Abdulrahim Ahmad Alzahrani
@kau.edu.sa
Professor, Chemical and Materials Engineering Dept., College of Engineering
King Abdulaziz University
Dr. Abdulrahim Al-Zahrani is Professor at the Chemical and Materials Engineering Department, King Abdulaziz University. He obtained his B.Sc. degree in Chemical Engineering from King Fahd University for Petroleum & Minerals (KFUPM) in 1982 and M.Sc. and Ph.D. degrees in 1985, 1989, respectively from Oregon State University (USA).
His research interests are varied and cover a wide spectrum of the chemical engineering. These include process modeling, control and simulation, Catalysis, fluidization engineering, industrial waste treatment and recycling and use of local ores in industries. He has over 118 published Journal papers, over 38 published conference papers, over 30 research reports and over 8 patents.
Dr. Al-Zahrani has served as a principal/co-principal investigator to 25 projects funded from Saudi Basic Industries Corporation (SABIC), King Abdulaziz City for Science and Technology (KACST) and King Abdulaziz University. He is a member of the research group of SABIC Chair for Heterogeneous Catalysis (two millions S.R, per year) during the period of 2006 to 2015. He is the head of the research group of SABIC Chair for Heterogeneous Catalysis during the period from 2016 to present. He served as the Chairman of Chemical & Materials Eng. Dept. for two years (2006 -2007) and Vice Dean of Engineering for Research and Graduate studies for six years (2008-2013). Dr. Zahrani is the Editor-in-Chief of King Abdulaziz Journal [Engineering Sciences] from 2014 until present. He has served as a principal/co-principal investigator to more than 10 Strategic Research Projects. He is a member of the King Abdulaziz University Promotion Committee and Research Ethics Committee from 2014 until Present.
EDUCATION
Ph.D. "Modeling and Control Studies of a Magnetically Staged Fluidized Bed", Chemical
Engineering Department, Oregon State University, Corvallis, Oregon, U. S. A., Jan. 1989.
Minor Electrical & Computer Engineering.
M.Sc. Chemical Engineering Department, Oregon State University, Corvallis, Oregon, USA, June 1985.
Minor Mathematics
B.Sc. Chemical Engineering Dept., College of Engineering Sciences, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia, June 1982.
RESEARCH INTERESTS
- Reactor Design and Catalysis
- Automatic Control, Modeling and Identification of Chemical Processes
- Recycling and Treatment of Industrial Wastes
- Use of Local Resources (Ores) in Industry
- Heat and Mass Transfer in Two and Three phase Fluidized Bed
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Arshid Mahmood Ali, Muhammad Shahbaz, Muddasser Inayat, Khurram Shahzad, Abdulrahim Ahmad Al-Zahrani, and Aishah Binti Mahpudz
Elsevier BV
Arshid Mahmood Ali, Abdul Waheed, Muhammad Shahbaz, Asif Ali Mirani, Khurram Shahzad, Abdulrahim Ahmad Al-Zahrani, Ayyaz Muhammad Nawaz, and Aishah Binti Mahpudz
Elsevier BV
Sami-ullah Rather, Hisham S. Bamufleh, Hesham Alhumade, Aqeel Ahmad Taimoor, Usman Saeed, Abdulrahim Ahmad Al-Zahrani, and O.M. Lemine
Elsevier BV
Arshid Mahmood Ali, Babar Azeem, Ahmad M. Alghamdi, Khurram Shahzad, Abdulrahim Ahmad Al-Zahrani, Muhammad Imtiaz Rashid, Aishah Binti Mahpudz, and Asif Jamil
MDPI AG
Controlled-release fertilizers are employed in precision agriculture to optimize technology-enabled farming without environmental deterioration. In this study, almond-shell lignocellulosic waste particles are chemically processed to synthesize a coating suspension for the production of controlled-release urea (CRU) in a Wurster fluidized-bed reactor. The interactive effect of process parameters such as atomizing air pressure (Pair), fluidized-bed temperature (Tfb), spray rate (Rspray), and fluidizing-air flow rate (Qair) on the (i) coating-film uniformity of CRU particles and (ii) longevity of nutrient-release from CRU is reported. CCRD is used with RSM to design the experiments for the optimization of nutrient-release performance and coating-film uniformity in terms of a coefficient-of-variance (CoV) of film thickness. The regression models indicate a good prediction of coating-film uniformity and nutrient-release time, with R2 = 0.971 and R2 = 0.98, respectively. The optimum conditions for coating-film uniformity are determined to be Pair = 3.5 bar, Tfb = 80 °C, Rspray = 0.15 mL/s, and Qair = 72 m3/h, with a predicted CoV film thickness of 11.5%. Similarly, Pair = 3.2 bar, Tfb = 78 °C, Rspray = 0.125 mL/s, and Qair = 75 m3/h are the optimum conditions for nutrient-release performance, with a prediction nutrient-release time = 56 h. The experimental validation yields a CoV of film thickness = 12.6% and a nutrient-release time = 49.5 h, indicating good agreement between predicted and experimental values. In addition, Tfb appears to be the most significant parameter.
Arshid Mahmood Ali, Muhammad Shahbaz, Khurram Shahzad, Muddasser Inayat, Salman Naqvi, Abdulrahim Ahmad Al-Zahrani, Muhammad Imtiaz Rashid, Mohammad Rehan, and Aishah Binti Mahpudz
Elsevier BV
Nagaraju Pasupulety, Abdurahim A. Al-zahrani, Muhammad A. Daous, Hafedh Driss, and Hesham Alhumade
Elsevier BV
Belal Al Zaitone, Abdulrahim Al-Zahrani, Osama Ahmed, Usman Saeed, and Aqeel Ahmad Taimoor
MDPI AG
The spray drying technique is suitable for different kinds of liquid dispersions and can be easily optimized to produce solid particles with tailored properties. The spray drying technique is a complex process. As an example, it is difficult to track drying kinetics, shape, and morphological changes on the scale of a single droplet. To better understand the effect of drying process variables on dried particle formation, it is useful to observe the drying of single droplets. Fundamental processes, such as mass and heat transfer, can then be easily monitored and compared with theoretical models. Acoustic levitation enables droplet/particle suspension in the air without any mechanical contact. Experiments in the acoustic levitator can be used to mimic the drying process in the spray dryer. The drying kinetics of single droplets of PEG6000 into solid particles was studied. Droplets with an initial polymer concentration (PEG6000 aqueous solution of 5%, 10%, and 15% (w/w)) were investigated at different gas drying temperatures. The size of the droplet, moisture content, and the shape evolution of the droplet/particle during the drying process were studied. The experimental drying curves were compared with the Reaction Engineering Approach (REA). The REA models were shown to provide a very good agreement for drying behavior, with a relative error of about ±3% between the initial and predicted droplet mass. This model can be implemented into the large-scale modeling of spray drying using Computational Fluid Dynamics (CFD).
Osama Atef Al-attar, Seetharamulu Podila, and Abdulrahim A. Al-Zahrani
Springer Science and Business Media LLC
Belal Al Zaitone, Muhammad Usman, Abdulrahim Al-Zahrani, Sami-ullah Rather, and Usman Saeed
Informa UK Limited
Abstract Most of the currently used fluid-solid heat transfer models assume that solid particles are perfect spheres. Heat transfer between non-spherical particles and flowing fluids acquires great importance in many engineering appliances. A numerical study is performed on airflow past a stationary confined prolate spheroid under the forced convective heat transfer regime, and the influence of non-sphericity of the particle on their heating rate is examined. The prolate spheroid is assumed to be maintained at a constant wall temperature. The effect of Reynolds number (Re) and Aspect Ratio (AR) on convective heat transfer rate and Nusselt number was investigated by solving steady-state Navier-Stokes and energy equations. The influence of the flow in terms of Reynolds number and the prolate spheroid aspect ratio was investigated. The spheroid’s surface temperature (Ts) was varied between 294 K and 1500 K. The simulations show that the mean Nusselt number has a positive dependence on Ts, AR, and Re. A new correlation was developed to predict the mean Nusselt number for a wide range of temperature differences. The new correlation consolidates the influence of aspect ratio, surface temperature, and Reynolds number, in contrast to the existing correlations that assume merely isothermal conditions to calculate the mean Nusselt number for spheroid particles.
Seetharamulu Podila, Hafedh Driss, Arshid M. Ali, Abdulrahim A. Al-Zahrani, and Muhammad A. Daous
Elsevier BV
Ali Shan Malik, Sharif F. Zaman, Abdulrahim A. Al-Zahrani, and Muhammad A. Daous
Elsevier BV
Hesham Alhumade, Ahmed Askalany, Hegazy Rezk, Abdulrahim A. Al-Zahrani, and Sharif F. Zaman
MDPI AG
In this paper, improving the overall heat transfer coefficient by adding aluminum species to silica gel has been studied theoretically. An adsorption desalination system is proposed, and a lumped theoretical model conducted to investigate employing the metal additives within the adsorbent bed with and without a heat recovery between condenser and evaporator. A 30% of the total mass of the adsorbent bed contents was considered to be replaced by aluminum species. According to this, the overall heat transfer coefficient has been increased by 260%, which shows a good impact on the performance of the adsorption system. Daily water productivity was increased by 70% at the worst-case, reaching up to 17 m3/day/ton of silica gel without heat recovery. By employing heat recovery with the metal filing, the daily water productivity reached 42 m3/day/ton of silica gel which is four times the productivity of the classic silica gel-based adsorption desalination system.
Nagaraju Pasupulety, Abdurrahim A. Al-Zahrani, Mohammad A. Daous, Hafedh Driss, and Lachezar A. Petrov
Elsevier BV
Hesham Alhumade, Hegazy Rezk, Abdulrahim A. Al-Zahrani, Sharif F. Zaman, and Ahmed Askalany
MDPI AG
The main target of this research work is to model the output performance of adsorption water desalination system (AWDS) in terms of switching and cycle time using artificial intelligence. The output performance of the ADC system is expressed by the specific daily water production (SDWP), the coefficient of performance (COP), and specific cooling power (SCP). A robust Adaptive Network-based Fuzzy Inference System (ANFIS) model of SDWP, COP, and SCP was built using the measured data. To demonstrate the superiority of the suggested ANFIS model, the model results were compared with those achieved by Analysis of Variance (ANOVA) based on the maximum coefficient of determination and minimum error between measured and estimated data in addition to the mean square error (MSE). Applying ANOVA, the average coefficient-of-determination values were 0.8872 and 0.8223, respectively, for training and testing. These values are increased to 1.0 and 0.9673, respectively, for training and testing thanks to ANFIS based modeling. In addition, ANFIS modelling decreased the RMSE value of all datasets by 83% compared with ANOVA. In sum, the main findings confirmed the superiority of ANFIS modeling of the output performance of adsorption water desalination system compared with ANOVA.
Belal Al Zaitone and Abdulrahim Al-Zahrani
Wiley
Sharif F. Zaman, Abdulrahim Al-Zahrani, and Aibibula Bake
Springer Science and Business Media LLC
Abstract Partial methanol oxidation (POM) is one of the possible routes for H 2 generation onboard for fuel cell-driven vehicles. The reaction was carried out with a stoichiometric ratio of CH 3 OH to O 2 in the feed following the equation CH 3 OH + ½O 2 → CO 2 + 2H 2 . Transition metals (Fe, Ni, Co, Cu, and Zn) were used as a promoter over Au/CeO 2 –ZrO 2 to catalyze POM reaction in the temperature range of 325–450 °C. The support was prepared from mechanically mixing of CeO 2 and ZrO 2 . Transition metals were deposited using the impregnation method, and the deposition–precipitation method was used to deposit Au on the samples containing transition metals. A combination of methods like low-temperature N 2 adsorption, powder XRD, TPR with H 2 , and XPS were used to evaluate the physicochemical, structural, and surface properties of the synthesized catalysts. Fe- and Cu-promoted catalysts were found less attractive due to low H 2 selectivity. Ni- and Co-promoted catalysts showed a promising H 2 selectivity but suffered from high CO selectivity. Interestingly, over 83% selectivity toward H 2 and less than a 16% CO selectivity with 95% CH 3 OH conversion were found for Zn-modified Au/CeO 2 –ZrO 2 samples at 450 °C, giving the highest yield for H 2 (~ 80%) among all the investigated catalysts in this study, which makes it a promising catalyst for this process. Moreover, below 400 °C, Zn-promoted catalyst showed the lowest CO selectivity compared to Co- and Ni-promoted one.
Hesham Alhumade, Ahmed Fathy, Abdulrahim Al-Zahrani, Muhyaddin Jamal Rawa, and Hegazy Rezk
MDPI AG
An optimal parameter estimation methodology of solid oxide fuel cell (SOFC) using modern optimization is proposed in this paper. An equilibrium optimizer (EO) has been used to identify the unidentified parameters of the SOFC equivalent circuit with the assistance of experimental results. This is presented via formulating the modeling process as an optimization problem considering the sum mean squared error (SMSE) between the observed and computed voltages as the target. Two modes of the SOFC-based model are investigated under variable operating conditions, namely, the steady-state and the dynamic-state based models. The proposed EO results are compared to those obtained via the Archimedes optimization algorithm (AOA), Heap-based optimizer (HBO), Seagull Optimization Algorithm (SOA), Student Psychology Based Optimization Algorithm (SPBO), Marine predator algorithm (MPA), Manta ray foraging optimization (MRFO), and comprehensive learning dynamic multi-swarm marine predators algorithm. The minimum fitness function at the steady-state model is obtained via the proposed EO with value of 1.5527 × 10−6 at 1173 K. In the dynamic based model, the minimum SMSE is 1.0406. The obtained results confirmed the reliability and superiority of the proposed EO in constructing a reliable model of SOFC.
Nagaraju Pasupulety, Abdurahim A. Al-Zahrani, Muhammad A. Daous, Seetharamulu Podila, and Hafedh Driss
Elsevier BV
Abstract Excellent CO2 hydrogenation activity results were obtained on Cu-Zn-Al-K (CZA-K) catalyst with 10% of CO2 conversion and 98% of methanol selectivity at 220 °C. The CZA-K catalyst was precipitated by using 4 M K2CO3/KOH solution. For comparison purpose, CZA-Na and CZA catalysts were synthesized by using 4 M solutions of Na2CO3/NaOH and (NH4)2CO3/NH4OH respectively. Characterization of these catalysts was done by using BET-poresize, XRD, FTIR-DRIFTs, high pressure-TPR, CO2-TPD-mass, XPS and HAADF-STEM-EDX techniques. Among the catalysts studied maximum methanol space time yield of 14.4 mmol·gcat−·h− was obtained on CZA-K at 240 °C with 2400 h− GHSV of CO2/H2 mole ratio equals to 1:4. Greater methanol yield was associated with superior surface Cu+/Cu0 content in CZA-K was obtained through K2CO3/KOH precipitation. Further, FTIR-DRIFTs spectra suggests the interaction of CO2 with the potassium existed in the CZA framework (0.65% K, EDX) led to the formation of K O (CO) O surface species. To some extent, CO2 dissociation to CO and subsequent CH4 formation was limited by this species in presence of H2. At 240 °C, steady catalytic activity was observed for 100 h of continuous operation on CZA-K. It was associated with fewer carbon deposits formation and segregated active metals in CZA-K catalyst. The decreasing order of CO2 hydrogenation activity at 240 °C with 3.0 MPa feed-gas pressure as follows: CZA-K (14% CO2 conversion and 96% methanol selectivity) > CZA-Na (11% and 94%) > CZA (9% and 92%).
Sami-ullah Rather, Usman Saeed, Abdulrahim Ahmad Al-Zahrani, Hisham S. Bamufleh, Hesham Abdulhamed Alhumade, Aqeel Ahmad Taimoor, O. M. Lemine, Arshid Mahmood Ali, Belal Al Zaitone, and Muhammad Mahmud Alam
Hindawi Limited
Nanocrystalline aluminum-doped manganese ferrite was synthesized by facile thermal treatment method. Nanostructure-doped ferrite with crystalline size that ranged between 3.71 and 6.35 nm was characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and vibrating-sample magnetometry (VSM). The Scherrer and Williamson-Hall hypothesis techniques were utilized to determine lattice constants and strain. Various types of structural properties including octahedral and tetrahedral site radius, bond lengths and angles, hopping parameter, oxygen positional parameters, site bonds, and edge lengths were determined from XRD spectrum analysis. Discrepancy in the hypothetically expected angle indicates improvement of A-B superexchange intercommunication. Furthermore, magnetic-hysteresis (M-H) and XPS analysis support the claim of enhancement. The presence of the ionic nature of iron and manganese in ferrite is FeII, FeIII, MnII, and MnIV as revealed by the results of XPS. Moreover, XPS assists in an excellent way to understand the properties such as configuration, chemical nature, and average inversion degree of doped ferrite samples. The spin noncollinearity and exquisite interaction amid the sublattice are responsible for the decrease in the saturation and remnant magnetization determined from the hysteresis loop at ambient temperature with maximum magnetic field of 1.8 T.
Arshid M Ali, Seetharamulu Podila, Muhammad A Daous, Abdulrahim A Al-Zahrani, and Aishah Mahpudz
Springer Science and Business Media LLC
Abstract The influence of Pd loading was studied for the gas phase catalytic hydrodechlorination of 1,2,4-trichlorobenzene over Pd supported on Mg-Al mixed oxide support with Mg:Al ratio 2:1. The Mg-Al support was prepared from hydrotalcite precursor. A series of catalysts was prepared with different loadings of Pd (1–6 wt%) on Mg-Al mixed oxide support. The performance of catalytic material was evaluated at different temperatures ranging from 425–575K. The fresh and used catalysts were characterized with different analytical techniques such as BET surface area, X-ray diffraction studies, Temperature programmed reduction, X-ray photoelectron spectroscopy and CO-chemisorption studies. H 2 -Temperature programmed desorption studies was also performed to understand the metal-support interaction and suitable active sites. The 4wt% of Pd on Mg-Al mixed oxide catalyst showed the highest conversion and selectivity among all catalysts and maintained steady activity with 10 h of time-on-stream studies. The main reasons for high activity are suitable metal-support interactions, Pd particle size, high surface area, and high surface Pd atomic concentration. Graphic abstract The influence of Pd loading was studied for gas phase catalytic hydrodechlorination of 1,2,4-trichlorobenzene over Pd supported on Mg-Al mixed oxide support with Mg:Al ratio 2:1. The different Pd-loadings in catalyst was studied for hydrodechlorination. The 4wt% of Pd on Mg-Al mixed oxide catalyst showed the highest performance among all the catalysts.
Belal Al Zaitone and Abdulrahim Al-Zahrani
Springer Science and Business Media LLC
Spray drying of Chitosan solutions to prepare microparticles either using pilot or industrial scale spray dryer is a complex process; tracking morphological changes and obtaining drying kinetics of a single droplet would be very difficult. The acoustic levitator being a non-intrusive method is a useful experimental apparatus that enables particle/droplet suspension in the gaseous medium and capable of mimicking the drying process in a spray dryer. The drying of chitosan aqueous solutions into solid particles was investigated. The prediction of the size and drying kinetics until the formation of the solid structure was performed in an acoustic levitator. Studying the drying of single droplets is crucial for revealing the influence of the drying process parameters on the formation of dried particles. Droplets with initial chitosan concentration (10, 20, and 30 mg/ml) were investigated at different air-drying temperatures. A Reaction Engineering Approach (REA) model was developed and compared with the experimental drying curves, a very well agreement was found between the drying experiments and the REA model with a relative error of about 3% between the initial droplet mass and predicted droplet mass by the REA model.
Sharif F. Zaman, Abdulrahim A. Alzahrani, Seetharamulu Podila, and Yahia Al Hamed
Wiley
Ali Shan Malik, Sharif F. Zaman, Abdulrahim A. Al-Zahrani, Muhammad A. Daous, Hafedh Driss, and Lachezar A. Petrov
Elsevier BV
Abstract PdZn-based catalysts have evolved as a very effective catalytic material for CO2 hydrogenation to methanol. ZrO2-supported PdZn and Ca-PdZn catalysts, synthesized by the simple impregnation method, exhibited excellent catalytic activity with impressive selectivity to methanol when tested for direct CO2 hydrogenation reaction. These catalysts were able to achieve up to 97–100 % methanol selectivity with significant CO2 conversion (single-pass of more than 10% in the case of Ca-doped PdZn/ZrO2) under reaction conditions of 20–30 bar, 2400 mL/g-h, H2/CO2 = 3:1, 220–270 °C. Addition of calcium to PdZn/ZrO2 catalyst had a positive impact on overall catalytic performance and catalyst lifetime. Ca-doped PdZn/ZrO2 catalyst also showed high stability for at least 100 h (on stream) implying the catalyst was very stable and resistant to sintering. The catalysts were characterized using BET, CO-chemisorption, CO2-TPD, XRD, XPS, SEM-EDS and TPR. Whereas, in-situ DRIFT study identified surface reaction transient intermediates, formates and methoxy species, and therefore, a reaction mechanism of formate pathway is proposed based on the DRIFT analysis.
Seetharamulu Podila, Hafedh Driss, Sharif F. Zaman, Abdulrahim A. Al-Zahrani, Muhammad A. Daous, and Lachezar A. Petrov
Elsevier BV
Abstract High surface area tungsten nitride catalysts synthesized from ammonium meta-tungstate and employed as catalysts for ecofriendly H2 production from NH3. A series of tungsten nitride catalysts synthesized by using CiA (citric acid) as chelating agent with different molar ratio of W and CiA. The synthesized materials characterized using BET-surface area, X-ray diffraction, X-ray photoelectron spectroscopy and SEM techniques. The BET value of as-synthesized tungsten nitride was raised from 25 to 80 m2 g−1. The influence of amount of CiA in preparation on the catalyst's surface area was investigated. The catalyst performance measured within the desired range of temperature 300–600 °C. A pure phase of tungsten nitride was formed by this preparation method. The catalyst with the ratio of CiA/W = 3 exhibited the best catalytic performance. The increased activity of WN-31 catalyst was mainly due to increased surface area, decreased particle size and high surface concentration. The WN-31 catalyst showed stable performance during time on study for 25 h. These bulk tungsten-based materials are easy to synthesize and highly stable material in the reaction atmosphere.
Nagaraju Pasupulety, Abdurrahim A. Al-Zahrani, Mohammad A. Daous, Hafedh Driss, and Lachezar A. Petrov
Elsevier BV
Abstract Here in, for the first time we are reporting molybdenum carbide reduction into metallic molybdenum during methane aromatization on HZSM-5 (Si/Al ratio = 23, 30, 50 and 80) at methane space velocity of 1800 mL.gcat−.h−. Benzene yield was influenced by the surface metallic molybdenum through the non-aromatic carbon deposits formation via linear hydrocarbons degradation on HZSM-5 with fewer acidity (Si/Al ratio = 30, 50 and 80). Our XPS analysis results demonstrated improved surface metallic molybdenum in spent Mo2C/HZSM-5 = 80 (0.71 atom. %) and 50 (0.54 atom. %) samples over Mo2C/HZSM-5 = 30 (0.33 atom. %) and 23 (0.20 atom. %) samples. Furthermore, HR-TEM and FFT analysis images clearly established fine distribution of distorted spherical shaped Mo2C particles with 6–14 nm size in spent Mo2C/HZSM-5 = 23. On the other hand, Mo2C particle size was increased upto 22 nm in Mo2C/HZSM-5 = 80. The ease reduction of Mo2C into metallic molybdenum and aggregation of Mo2C particles in spent higher Si to Al ratio (50 and 80) samples was associated with weak interactions between Mo2C and the HZSM-5 with fewer acidity. At 700 °C, the order of benzene yield as follows: Mo2C/HZSM-5 = 80 (2.2%)
RECENT SCHOLAR PUBLICATIONS
MOST CITED SCHOLAR PUBLICATIONS
Publications
1- Levein, K. L. and Al-Zahrani, A. A., " Magnetically Staged Fluidized bed for Counter Current Gas/Solids Contacting, Powder Technology, 64, 1990, p. 133-143.
2- Noorwali, N. M., and Al-Zahrani, A. A., "Optimal Heat Exchanger Network for Energy Conservation of a Crude Oil Refinery", Journal of King Abdulaziz University: Engineering Science (Special Issue), 1991, p17.
3- Al-Zahrani, A. A. and Noorwali, M. M., "Heat transfer Coefficient in Annuli of Different Diameter Ratios and Different Bulk Temperatures", Journal of King Abdulaziz University: Engineering Science (Special Issue), 1991, p.25.
4- Al-Zahrani, A . A. and Hussien, M., "Regeneration of Spent Bleaching Clay and Oil Recovery", Science International, 4(4), 1992, p. 373.
5- Al-Zahrani, A. A. and Noorwali, M. M.," An Adaptive Bilinear Model-Predictive Control Algorithm for a Plate Heat Exchanger", Developments in Chemical & Material Processing Engineering, 2, 1994, p. 158.
6- Al-Zahrani, A. A. and Noorwali, M. M., "A study of Pressure Fluctuations in a Bubbling Fluidized Bed", Powder Technology, 1993, p. 185.
7- Al-Zahrani, A. A. and Noorwali, M. M., "Advance logarithms for Average Level Control", J. of Control and Computers, vol. 23, , p. 79-83.
8- Al-Zahrani, A. A., "Adaptive Bilinear Model-Predictive Control", Inter. J. for Computer Applications in Technology, Vol. 8, No. 5/6, 1995, p. 393-399.
9- Al-Zahrani, A.A. and Al-Tajam, M.A., "Measurement of Heat Transfer Coefficient in Liquid- Solid Fluidized Bed Reactor", Powder Technology, 80(1994)25.
10- Al-Zahrani, A. A. and Al-hamed, Y. A., "Regeneration of Spent Bleaching Clay and Oil Recovery by Boil-off Method and Acid Treatment", Middle East Forum, 1 (1995), p. 17-28.
11- Al-Zahrani, A.A.," Bilinear Development of Bilinear Models for Some Chemical Processes, King Abdulaziz University J.: Eng. , , pp. 3-12.
12- Al-Zahrani A. A. and Daous, M. A., "Bed Expansion and Average Bubble Rise Velocity in a Gas-Solid Fluidized Bed", Powder Technology, 87 (1996), p. 255-257.
13- Al-Zahrani, A. A. and Al-hamed, Y. A., "Regeneration of Spent Bleaching Clay by Calcination and Acid Treatment", Journal of Indian Institute of Chemical Engineers, 38(3), 1996, p. 71-75.
14- Al-Hamed, A. S. and Al-Zahrani, A. A.," A Model for Extraction of Oil from Spent Bleaching Clays", Arabian Journal for Science and Engineering, 23 (2B), 1998, p. 165-176.
15- Daous, M. A. and Al-Zahrani, A.A., “Modeling solids and gas flow through an L-Valve”, Powder Technology, 99, 1998, p.86-89.
16- Al-Hamed, Y. A. and Al-Zahrani, A. A., “Techno-Economical Evaluation of Oil Recovery and Regeneration of Spent Bleaching Clay", Journal of King AbdulAziz University: Engineering Science, 11 (2), 1999, p. 115-126.
17- Al-Zahrani, A. A., “Heat Transfer Coefficient in Liquid-Solids Fluidized Beds”, Indian Chemical Engineer: Section A., Vol. 41, No.4, 1999, p.282.
18- Al-Zahrani, A. A., Al Shahrani, S. S. and Al Tawil, Y. A., “Study on the Activation of Saudi Clays”, Chemical Engineering World, v 34, n 12, 1999, p 91-101
19- Al-Zahrani, A. A.,” Particle Size Distribution in a Continuous Gas-Solid Fluidized Bed”, Powder Technology, 107, 2000, p. 54- 59.
20- Al-Zahrani, A. A. and Daous, M. A., “Recycling of Spent Bleaching Clay and Oil Recovery”, Trans IChemE, 78, Part B, 2000, p. 22-24.
21- Al-Zahrani, A. A, “An Adaptive Bilinear Model-Predictive Control Algorithm for a Continuous Stirred Tank Reactor”, International Journal of Computer Applications in Technology, 2000, Vol. 13, Nos. 3/ 4/ 5, 261 - 265 (2000).
22- Al-Zahrani, A. A., “Process and Economical Evaluation for the Production of Active Clay from Local Row Clay by Sulfuric Acid Treatment”, Science International, 12(1), 59-66, 2000.
23- Al-Zahrani, A. A., Al Shahrani, S. S. and Al Tawil, Y. A., “Study on the Activation of Saudi Natural Bentonite, Part I: Investigation of Optimum Conditions and Kinetics of the Sulfuric Acid Activation Process”, Journal of King Saud University, Vol. 13 (1), Eng. , PP. 57-72 (2001).
24- Al-Zahrani, A.A. and Al-hamed, Y.S., Solvent Extraction of Oil from Spent Bleaching Clay, Journal of Environmental Science and Health, Part A: Toxic / Hazardous Substance & Environmental Engineering, A35(9), 15577-1590 (2001).
25- Al-Zahrani, A. A., Al Shahrani, S. S. and Al Tawil, Y. A., “Study on the Activation of Saudi Natural Bentonite, Part II: Characterization of the produced active clay and its Test as an Adsorbing agent”, Journal of King Saud University,13(2), Eng. , p. 203-224 (2002).
26- Al-Zahrani, A.A., “Decomposition of Saudi Phosphate Rock with Nitric Acid”, Alexandria Engineering Journal, V. 39 (2000), No. 6, 977-981.
27- Al-Zahrani, A . A. and Hussien, M., “Production of Liquid Alum Coagulant from Local Saudi Clays”, King AbdulAziz University: Engineering Science, 15(1), 2004, p. 3 -17.
28- Daous, M. A. and Al-Zahrani, A.A, “ A Simple Approach to Measure the Gas Phase Heat and Mass Transfer Coefficients in a Bubble Column”, Chemical Engineering Technology, 29(12) 2006, 1438 – 1443.
29- Al-Zahrani, A. A. and Hussien, M. , " Extraction of Alumina From Local Clays by Hydrochloric Acid Process ", King AbdulAziz University: Engineering Science, 20(2), 2009. p. 29 - 41.
30- Abdulrahim Al-Zahrani ; Gaber IDRIS, “Biological Treatment of Hydrocarbon Contaminants: Petroleum Hydrocarbon uptake by Pseudomonas alkanolytica”, Journal of King Abdulaziz University : Engineering Sciences, (2010) 39-53.
31- K. Kumbilieva, L. Petrov, Y. Alhamed, A. Al Zahrani, Reaction mechanism and deactivation modes of heterogeneous catalytic systems, Chin. J. Catal., 32(3) (2011) 387-404. DOI: 10.1016/S1872-2067(10)60181-7 Published: MAR 2011.
32- A. H. El-Shazly, A.A. Al-Zahrani, S.S. Al-Shahrani, “ Improvement of NO3 Removal from Wastewater by Using Batch Electrocoagulation Unit with Vertical Monopolar Aluminum Electrodes”, Int. J. Electrochem. Sci., 6(2011) 4141 -4149.
33- L. Petrov, Y. Alhamed, A. Al Zahrani, M. Daous, Role of chemical kinetics in the heterogeneous catalysis studies, Chin. J. Catal., 32 (7) (2011) 1085-1112. DOI: 10.1016/S1872-2067(10)60181-7.
34- F. Abdel-Hady, Abdulrahim Alzahrany and Mostafa Hamed, "Experimental validation of upward electrospinning process", ISRN NanotechnologyVolume 2011 (2011), Article ID 851317, 14 pages, doi:10.5402/2011/851317.
35- L. Petrov, M. Daous, Y. Alhamed, A. Al-Zahrani, Kh. Maximov, Use of intraparticle mass transfer parameters as a design tool for catalyst pellets, Chin. J. Catal., 33 (2012) 1166-1175.
36- Zytoon, Mohamed; El-Shazly, Ahmed; Noweir, Madbuli; Al-zahrani, Abdulraheem ,"Quantitative Safety Analysis of a Lab-Scale Bioreactor for Hydrogen Sulfide Biotreatment Using Fault Tree Analysis" , Process Safety Progress, Volume: 32 Issue: 4 Pages: 376-386 DOI: 10.1002/ Published: DEC 2013.
37- A.H. El-Shazlya, A.A. Al-Zahrani, Y.A. Al-Hamed, S.A. Nosiera, "Effect of fixed bed characteristics on the performance of pulsed water flow humidification-dehumidification solar desalination unit", Desalination and Water Treatment, Vol. 51, Issue 4-6( 2013) p. 863-871.
38- A.H. El-Shazlya, A.A. Al-Zahrani, Y.A. Al-Hamed, S.A. Nosiera, "Productivity Intensification of Humidification Dehumidification Desalination Unit by Using Pulsed Water Flow Regime" Desalination, 293(2012)53-60.
39- Hossein Jafari, Haleh Tajadodi, Dumitru Baleanu, Abdulrahim A. Al-Zahrani,Yahia A. Alhamed,Adnan H. Zahid, “Fractional sub-equation method for the fractional generalized reaction Duffing model and nonlinear fractional Sharma-Tasso-Olver equation”, Cent. Eur. J. Phys., 11(10) • 2013 • 1482-1486 (2013), DOI: 10.2478/S 11534-013-0203-7.
40- J. A. T. Machado, Dumitru Baleanu, Abdulrahim A. Al-ZahraniI, Y A. Alhamed, Adnan Zahid, Tamer E. Yousif , “On Similarities In Infrares Spectra of Complex Drugs”, Rom. Rep. Phys. Volume: 66 Issue: 2 Pages: 382-393 (2014).
41- A.H. El-Shazlya, A.A. Al-Zahrani, Y.A. Al-Hamed,”Kinetics and Performance Analysis of Batch Electrocoagulation Unit for the Removal of a Mixtue of Phosphate and Nitrate Ions from Industrial Effluents”, Int. J. Electrochem. Sci. 8 (2013) 3176 -3185.
GRANT DETAILS
Last 10 years
21- Catalysts Development for Dehydrogenation of Propane to Propene, sponsored by King Abdulaziz City for Science and Technology, 2010- 2012 (Project Budget: SR 1,800,000)
22- H2S biological treatment, Funded by King Abdulaziz University, 2012.
23- Gold Supported Catalysts for CO and VOCs Oxidation. A collaboration research program between King Abdulaziz University (KAU) and The Queens University of Belfast, Supported by KAU, 2011- 2015 (Project Budget: SR 3,148,000).
24- Investigation of Mo2N catalyst for syngas conversion to higher oxygenates, supported by King Abdulaziz City for Science and Technology, 2015-2018 (Project Budget: SR 1,750,200).
25- Development of a new polymer modified electrode using polyaniline coated graphite: Application to electrooxidation of organic effluent. Sponsored by King Abdulaziz City for Science and Technology, 2014-2015 (Project Budget: SR 1,748,800).
26- Partial oxidation of methanol (POM) over transition metal promoted nanostructure gold catalysts supported on CeO2-ZrO2 . supported by SABIC Chair, 2014-2015 (Project Budget: SR 350,000).
27- Catalytic synthesis of light olefins using CO2 and H2, sponsored by SABIC, Jan 2017-Dec. 2018 (Project Budget: SR 2,245,600).
28- Catalytic Dehydrogenation of n-Butane to Butene Isomers, sponsored by SABIC, Jan 2017-Dec 2018 (Project Budget: SR 1,950,600).
29- Potential cost reduction by an innovative design of closed parabolic trough solar collector, . Sponsored by King Abdulaziz City for Science and Technology, 2018-2020, (Project Budget: SR 1,748,800). 1,840,400 SR
RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)
Patents
1. Al-hamed, Y., Al-zahrani, A., Daous, M. & El-yahyaoui, K. (2008), Process of Oxidative Dehydrogenation Using a Boria-Alumina Catalyst. PCT International Publication Number WO 2008/141827 A1. World Intellectual Property Organization.
2. L. Petrov, Y. Alhamed, A. Al Zahrani, M. Daous, M. Umar, M. Al-Hazmi, Platinum containing catalysts for propane dehydrogenation, EPA № 12005440.8/26.07.2012
3. L. Petrov, Y. Alhamed, A. Al Zahrani, M. Daous, M. Umar, M. Al-Hazmi, Alkane dehydrogenation catalyst and process for its preparation, EPA № 12006767.3/27-09-2012,
4. L. Petrov, Y. Alhamed, A. Arafat, A. Al Zahrani, M. Daous, M. Al-Hazmi (2014) Gold containing catalysts for propane dehydrogenation. PCT International Publication Number WO 2014/181289 A2. World Intellectual Property Organization.
5. H. Zhang, L. Petrov, Y. Alhamed, A. Al-Zahrani, M. Daous, M. Al-Hazmi, Mixed oxide catalysts for ammonia decomposition, PCT International Publication Number WO2015177773A1. World Intellectual Property Organization.
6. S. Zaman, M. Daous, Y. Alhamed, A. Al-Zahrani, L. Petrov, J.Touitou, Zn-CeO2-ZrO2 Catalyst for Hydrogen production via methanol partial oxidation, US20180185823, NOV. 2018.
7. H. Inokawa, S. Zaman, M. Daous, A. Al-Zahrani, L. Petrov, Vanadium Oxide catalyst supported on CeO2-ZrO2 for Formaldehyde Production via Partial Oxidation of Methanol, Patent No . : US 10 , 207 , 253 B1 ( 45 ) Date of Patent : Feb . 19 , 2019.
8. S. Zaman, H Inokawa, M. Daous, A. Al-Zahrani, L. Petrov; Mn-CeO2 Catalyst for Dimethyl Ether Production via Oxidative Dehydration of Methanol, Pub. No. US: 2020/0129960 A1. Apr. 2020 .