Dr. Rama Rao Karri
@utb.edu.bn
Senior Assistant Professor, Petroleum and Chemical Engineering,
Universiti Teknologi Brunei
Dr. Rama Rao Karri is a Professor (Sr. Asst) in Universiti Teknologi Brunei, Brunei Darussalam. He has PhD from Indian Institute of Technology (IIT) Delhi, Masters from IIT Kanpur in Chemical Engineering. He has worked as Post-Doctoral research fellow at NUS, Singapore for about six years and has over 20 years of working experience in Academics, Industry, and Research. He has experience of working in multidisciplinary fields and has expertise in various evolutionary optimization techniques and process modeling. As of 15 May 2024, he has published 230 research articles in reputed journals, book chapters, and conference proceedings with a combined Impact factor of 853.13 and has an h-index of 42 (Scopus-citations: 5600+) and 45 (Google Scholar-citations: 6400+). He is an editorial board member in 10 renowned journals and a peer-review member for more than 100 reputed journals. Listed in the top 2% of the world’s most influential scientists for the last 3 years (2021-23).
EDUCATION
Post-Doc at National University of Singapore
PhD in Chemical Engineering from Indian Institute of Technology (IIT) Delhi
M.Tech from IIT Kanpur, India
B. Tech from Andhra University College of Engineering, Visakhapatnam.
RESEARCH, TEACHING, or OTHER INTERESTS
Engineering, Environmental Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Sumalatha Jorepalli, Sreedevi Adikay, Radha Rani Chinthaparthi, Chandra Sekhar Reddy Gangireddy, Janardhan Reddy Koduru, and Rama Rao Karri
Springer Science and Business Media LLC
AbstractA series of novel chromone derivatives of (N-(4-oxo-2-(trifluoromethyl)-4H-chromen-6-yl) benzamides) were synthesized by treating 7-amino-2-(trifluoromethyl)-4H-chromen-4-one with K2CO3 and/or NaH, suitable alkyl halides and acetonitrile and/or 1,4-dioxane. The obtained products are in high yields (87 to 96%) with various substituents in short reaction times with no more by-products and confirmed by FT-IR, 1H, and 13C-NMR Spectral data. The in vitro cytotoxic activity was examined against two human cancer cell lines, namely the human lung adenocarcinoma (A-549) and the human breast (MCF-7) cancer cell line. Compound 4h showed promising cytotoxicity against both cell lines with IC50 values of 22.09 and 6.40 ± 0.26 µg/mL respectively, compared to that of the standard drug. We also performed the in vitro antioxidant activity by DPPH radical, hydrogen peroxide, NO scavenging, and total antioxidant capacity (TAC) assay methods, and they showed significant activities. The possible binding interactions of all the synthesized chromone derivatives are also investigated against selective pharmacological targets of human beings, such as HERA protein for cytotoxic activity and Peroxiredoxins (3MNG) for antioxidant activity which showed closer binding free energies than the standard drugs and evidencing the above two types of activities.
Chua Qi Yi, Muhammad Na’im Bin Haji Bujang Haji Bojeng, Siti Khadijah Binti Haji Kamis, Nabisab Mujawar Mubarak, Rama Rao Karri, and Hazwan Azri
Springer Science and Business Media LLC
AbstractPlastic waste is being manufactured for the production of hydrogen. The amount of plastic waste collected annually is 189,953 tonnes from adjacent nations like Indonesia and Malaysia. Polyethylene (PE), Polypropylene (PP), Polyethylene Terephthalate (PET), Polyvinyl chloride (PVC), and Polystyrene (PS) are the five most prevalent forms of plastic found in most waste. Pyrolysis, water gas shift and steam reforming reaction, and pressure swing adsorption are the three main phases utilized and studied. In this research, authors examines the energy consumption on every stage. The plastic waste can be utilized to manufacture many hydrocarbons using the pyrolysis reaction. For this process, fast pyrolysis is being used at a temperature of 500 °C. A neutralization process is also needed due to the presence of Hydrochloric acid from the pyrolysis reaction, with the addition of sodium hydroxide. This is being carried to prevent any damage to the reactor during the process. Secondly, the steam reforming process continues after the water gas shift reaction has produced steam and carbon monoxide, followed by carbon dioxide and hydrogen formation. Lastly, pressure swing adsorption is designed to extract H2S and CO2 from the water gas shift and steam reforming reaction for greater purity of hydrogen. From the simulation study, it is observed that using various types of plastic waste procured (total input of 20,000 kg per hour of plastics) from, Brunei Darussalam, Malaysia and Indonesia, can produce about 340,000 tons of Hydrogen per year. Additionally, the annual profit of the Hydrogen production is estimated to be between $ 271,158,100 and $ 358,480,200. As per the economic analysis, it can be said that its a good to start hydrogen production plant in these regions.
Lakshmi Prasanna Lingamdinne, Ganesh Kumar Reddy Angaru, Chandrika Ashwinikumar Pal, Janardhan Reddy Koduru, Rama Rao Karri, Nabisab Mujawar Mubarak, and Yoon-Young Chang
Springer Science and Business Media LLC
AbstractThis study synthesized a highly efficient KOH-treated sunflower stem activated carbon (KOH-SSAC) using a two-step pyrolysis process and chemical activation using KOH. The resulting material exhibited exceptional properties, such as a high specific surface area (452 m2/g) and excellent adsorption capacities for phenol (333.03 mg/g) and bisphenol A (BPA) (365.81 mg/g). The adsorption process was spontaneous and exothermic, benefiting from the synergistic effects of hydrogen bonding, electrostatic attraction, and stacking interactions. Comparative analysis also showed that KOH-SSAC performed approximately twice as well as sunflower stem biochar (SSB), indicating its potential for water treatment and pollutant removal applications. The study suggests the exploration of optimization strategies to further enhance the efficiency of KOH-SSAC in large-scale scenarios. These findings contribute to the development of improved materials for efficient water treatment and pollution control.
Syed Noeman Taqui, Akheel Ahmed Syed, Nabisab Mujawar Mubarak, Rizwan Abutaleeb Farade, M. A. Majeed Khan, Md. Abul Kalam, Mohammad Hadi Dehghani, Manzoore Elahi Mohammad Soudagar, Rauoof Ahmad Rather, Sathgatta Zaheeruddin Mohamed Shamshuddin,et al.
Springer Science and Business Media LLC
Nadeem Hussain Solangi, Rama Rao Karri, Nabisab Mujawar Mubarak, and Shaukat Ali Mazari
Elsevier BV
Yao Zu Tan, Yie Hua Tan, Jibrail Kansedo, N. M. Mubarak, Bridgid Lai Fui Chin, Rama Rao Karri, Mohd Lokman Ibrahim, and Peter Nai Yuh Yek
Springer Science and Business Media LLC
Nabisab Mujawar Mubarak, Nadeem Hussain Solangi, Rama Rao Karri, Yie Hua Tan, Shahriar Shams, Khairunnisa Nabilah Ruslan, Shaukat Ali Mazari, and Mohammad Khalid
Springer Science and Business Media LLC
Mohammad Hadi Dehghani, Shabnam Ahmadi, Soumya Ghosh, M. Shahnawaz Khan, Amina Othmani, Waheed Ahmad Khanday, Ömür Gökkuş, Christian Osagie, Md. Ahmaruzzaman, Soumya Ranjan Mishra,et al.
Elsevier BV
Shivam Pandey, Ajay Singh, Anuj Kumar, Inderjeet Tyagi, Rama Rao Karri, Rama Gaur, Hamedreza Javadian, and Monu Verma
Elsevier BV
Safia Khan, Awais Ahmad, Rama Rao Karri, Mohamed Ouladsmane, Naveed Kausar Janjua, and Hu Li
Elsevier BV
Leila Rasuli, Mohammad Hadi Dehghani, Mehdi Salari, Rama Rao Karri, Nabisab Mujawar Mubarak, Nadeem A. Khan, Nadeem Hussain Solangi, and Natarajan Rajamohan
Springer Science and Business Media LLC
Mina Aghaei, Nahid Khoshnamvand, Hosna Janjani, Mohammad Hadi Dehghani, and Rama Rao Karri
Springer Science and Business Media LLC
Nadeem Hussain Solangi, Rama Rao Karri, Nabisab Mujawar Mubarak, and Shaukat Ali Mazari
Elsevier BV
Nadeem Hussain Solangi, Nabisab Mujawar Mubarak, Rama Rao Karri, Shaukat Ali Mazari, and Janardhan Reddy Koduru
Elsevier BV
Rakesh Kulkarni, Lakshmi Prasanna Lingamdinne, Rama Rao Karri, Zahid Husain Momin, Janardhan Reddy Koduru, and Yoon-Young Chang
Elsevier BV
Syed Noeman Taqui, Akheel Ahmed Syed, Nabisab Mujawar Mubarak, Rizwan Abutaleeb Farade, M. A. Majeed Khan, Md. Abul Kalam, Mohammad Hadi Dehghani, Manzoore Elahi Mohammad Soudagar, Rauoof Ahmad Rather, Sathgatta Zaheeruddin Mohamed Shamshuddin,et al.
Springer Science and Business Media LLC
AbstractResearch studies have been carried out to accentuate Fennel Seed Spent, a by-product of the Nutraceutical Industry, as an inexpensive, recyclable and operational biosorbent for bioremediation of Acid Blue 113 (AB113) in simulated water-dye samples and textile industrial effluent (TIE). The physical process of adhesion of AB113 on the surface of the biosorbent depends on various parameters, such as the initial amount of the dye, amount and expanse of the biosorbent particles, pH of the solution and temperature of the medium. The data obtained was analyzed using three two-parameter and five three-parameter adsorption isotherm models to glean the adsorbent affinities and interaction mechanism of the adsorbate molecules and adsorbent surface. The adsorption feature study is conducted employing models of Weber-Morris, pseudo 1st and 2nd order, diffusion film model, Dumwald-Wagner and Avrami model. The study through 2nd order pseudo and Avrami models produced complementary results for the authentication of experimental data. The thermodynamic features, ΔG0, ΔH0, and ΔS0 of the adsorption process are acclaimed to be almost spontaneous, physical in nature and endothermic in their manifestation. Surface characterization was carried out using Scanner Electron Microscopy, and identification and determination of chemical species and molecular structure was performed using Infrared Spectroscopy (IR). Maximum adsorption evaluated using statistical optimization with different combinations of five independent variables to study the individual as well as combined effects by Fractional Factorial Experimental Design (FFED) was 236.18 mg g−1 under optimized conditions; pH of 2, adsorbent dosage of 0.500 g L−1, and an initial dye concentration of 209.47 mg L−1 for an adsorption time of 126.62 min with orbital shaking of 165 rpm at temperature 49.95 °C.
Abdul Sattar Jatoi, Jawad Ahmed, Nabisab Mujawar Mubarak, Muhammad Shuaib Shaikh, Sandeep Kumar, Muhammad Ismail Ahmed, and Rama Rao Karri
Springer Science and Business Media LLC
Mohammad Hadi Dehghani, Shabnam Ahmadi, Soumya Ghosh, Amina Othmani, Christian Osagie, Maryam Meskini, Samar Sami AlKafaas, Alhadji Malloum, Waheed Ahmad Khanday, Ajala Oluwaseun Jacob,et al.
Elsevier BV
Mahboobeh Kasraee, Mohammad Hadi Dehghani, Farshad Hamidi, Nabisab Mujawar Mubarak, Rama Rao Karri, Natarajan Rajamohan, and Nadeem Hussain Solangi
Springer Science and Business Media LLC
AbstractDischarging untreated dye-containing wastewater gives rise to environmental pollution. The present study investigated the removal efficiency and adsorption mechanism of Acid Red 18 (AR18) utilizing hexadecyl-trimethyl ammonium chloride (HDTMA.Cl) modified Nano-pumice (HMNP), which is a novel adsorbent for AR18 removal. The HDTMA.Cl is characterized by XRD, XRF, FESEM, TEM, BET and FTIR analysis. pH, contact time, initial concentration of dye and adsorbent dose were the four different parameters for investigating their effects on the adsorption process. Response surface methodology-central composite design was used to model and improve the study to reduce expenses and the number of experiments. According to the findings, at the ideal conditions (pH = 4.5, sorbent dosage = 2.375 g/l, AR18 concentration = 25 mg/l, and contact time = 70 min), the maximum removal effectiveness was 99%. The Langmuir (R2 = 0.996) and pseudo-second-order (R2 = 0.999) models were obeyed by the adsorption isotherm and kinetic, respectively. The nature of HMNP was discovered to be spontaneous, and thermodynamic investigations revealed that the AR18 adsorption process is endothermic. By tracking the adsorption capacity of the adsorbent for five cycles under ideal conditions, the reusability of HMNP was examined, which showed a reduction in HMNP's adsorption effectiveness from 99 to 85% after five consecutive recycles.
Moslem Tazik, Mohammad Hadi Dehghani, Kamyar Yaghmaeian, Shahrokh Nazmara, Mehdi Salari, Amir Hossein Mahvi, Simin Nasseri, Hamed Soleimani, and Rama Rao Karri
Springer Science and Business Media LLC
Abstract4-Chlorophenol pollution is a significant environmental concern. In this study, powdered activated carbon modified with amine groups is synthesized and investigated its efficiency in removing 4-chlorophenols from aqueous environments. Response surface methodology (RSM) and central composite design (CCD) were used to investigate the effect of different parameters, including pH, contact time, adsorbent dosage, and initial 4-chlorophenol concentration, on 4-chlorophenol removal efficiency. The RSM-CCD approach was implemented in R software to design and analyze the experiments. The statistical analysis of variance (ANOVA) was used to describe the roles of effecting parameters on response. Isotherm and kinetic studies were done with three Langmuir, Freundlich, and Temkin isotherm models and four pseudo-first-order, pseudo-second-order, Elovich, and intraparticle kinetic models in both linear and non-linear forms. The synthesized adsorbent was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) analyses. The results showed that the synthesized modified activated carbon had a maximum adsorption capacity of 316.1 mg/g and exhibited high efficiency in removing 4-chlorophenols. The optimal conditions for the highest removal efficiency were an adsorbent dosage of 0.55 g/L, contact time of 35 min, initial concentration of 4-chlorophenol of 110 mg/L, and pH of 3. The thermodynamic study indicated that the adsorption process was exothermic and spontaneous. The synthesized adsorbent also showed excellent reusability even after five successive cycles. These findings demonstrate the potential of modified activated carbon as an effective method for removing 4-chlorophenols from aqueous environments and contributing to developing sustainable and efficient water treatment technologies.
Vinayak Talugeri, Nagaraj Basavaraj Pattana, Veeranna Basawannappa Nasi, Kiran Shahapurkar, Manzoore Elahi Mohammad Soudagar, Tansir Ahamad, Md. Abul Kalam, Kiran Madrahalli Chidanandamurthy, Nabisab Mujawar Mubarak, and Rama Rao Karri
Springer Science and Business Media LLC
AbstractA limited experimental work was on multi-walled carbon nanotube (MWCNT)—water nanofluid with surfactant in the solar parabolic collector at low volume concentrations. At high-volume concentrated nanofluid, the pressure drop was more due to an increase in the viscosity of the working fluid and an increase in the nanoparticle cost; hence it is not economical. This report attempted to use Sodium Dodecyl Benzene Sulfonate (SDBS) surfactant in the low-volume concentrated MWCNT-water nanofluid to establish effective heat transfer in solar parabolic collector applications. The stable MWCNT-water nanofluid was prepared at 0.0158, 0.0238, and 0.0317 volume concentrations. The experiments were conducted from 10:00 to 16:00 at 6, 6.5 and 7 L/min flow rates concerning ASHRAE Standards. At the 7 L/min flow rate of the working fluid, having a minimum temperature difference between the working fluid and absorber tube leads to better heat transfer. The increased volume concentration of MWCNT in the water enhances the surface area interaction between water and MWCNT nanoparticles. This results in maximum solar parabolic collector efficiency at 0.0317 vol% with a 7 L/min flow rate and 10–11% higher than the distilled water.
Nadeem A. Khan, Simranjeet Singh, Eduardo Alberto López-Maldonado, Pavithra N., Perla Fabiola Méndez-Herrera, Juan Ramón López-López, Umair Baig, Praveen C. Ramamurthy, Nabisab Mujawar Mubarak, Rama Rao Karri,et al.
Elsevier BV
Nadeem Hussain Solangi, Rama Rao Karri, Nabisab Mujawar Mubarak, Shaukat Ali Mazari, and Abul Kalam Azad
Elsevier BV
Gnanasambandam Anbuchezhiyan, Nabisab Mujawar Mubarak, Rama Rao Karri, Bashir Suleman Abusahmin, Faisal Abnisa, and Muhammad Ekhlasur Rahman
Elsevier BV
Muhammad Waseem, Awais Ahmad, Muhammad Sagir, Umer Younas, Zohaib Saeed, Muhammad Pervaiz, Faisal Ali, Ahmed Muteb Aljuwayid, Mohamed A. Habila, and Rama Rao Karri
Elsevier BV