Jose Mansur Assaf

Scopus Publications

Effect of Synthesis Methods for ZnZrOx Oxides Associated with SAPO-34 on the Production of Light Olefins By CO2 Hydrogenation
Ananda Vallezi Paladino Lino, Elisabete Moreira Assaf, José Mansur Assaf
Catalysis Letters, 2026
Ethanolic Transesterification with Methyl Acetate Catalyzed by SBA-15 Functionalized with Imidazolium–Sulfonic Groups
Fernando Gazola, Iago Zapelini, José Assaf
Crystals, 2026
The global demand for biodiesel production is steadily increasing. Conventional homogeneous basic catalysts, while widely used in the industry, face significant drawbacks, such as the requirement for high-quality feedstock, excessive waste generation, and multiple purification steps. In this study, an acidic silane (IM-CPTMS-BS-H2SO4) containing imidazolium and sulfonic groups was synthesized. Heterogeneous catalysts were then prepared by anchoring varying proportions of the silane onto SBA-15 mesoporous solids. These materials were characterized by FTIR, 13C and 29Si NMR, TGA, XRD, CHNS and acidity measurements. The catalysts were evaluated in the transesterification of methyl acetate with ethanol, with increasing catalytic conversions with the amount of grafted IM-CPTMS-BS-H2SO4. Furthermore, increasing the catalyst loading (from 2% to 5% wt.) and the reaction temperature (from 50 °C to 65 °C) led to higher methyl acetate conversion rates.
Enhanced oxygen mobility in NiAg alloy catalysts for methane dry reforming: The role of AgO nanoparticles
Alberth Renne Gonzalez Caranton, Ananda Vallezi Paladino Lino, Calazans Macchiutti, Jilder Dandy Peña serna, Noemi Raquel Checca Huaman, et al.
Catalysis Today, 2025
Exploring N2 capturing in Liquid Argon using Li-FAU Mol Sieve in the Iceberg Cryostat
Pedro Bianchi Neto, Renato Soccol Junior, Flor de Maria Blaszczyk, Sergey Koshelev, Alan Hahn, et al.
Journal of Instrumentation, 2025
Liquefied ultrapure noble gases are typically the chosen target for neutrino and dark matter experiments. Commonly, the required grade of purity of such cryogenic liquids in terms of O2 contamination is less than 100 ppt, which makes it necessary for the argon to circulate through adsorption columns filled, typically, with BASF Cu-0226S and Mol Sieve 4A for capturing O2 and H2O. Another requirement that emerged during the design of LBNF-DUNE is the purity of the Liquid Argon (LAr) in terms of N2 concentration, as it was observed that both N2 and O2 contaminations can cause the reduction of the LAr scintillation light emission. In particular, a decreasing behavior in the lifetime and the relative amplitude of the slow component is relevant from concentrations of 1 ppm of N2 and 0.1 ppm of O2. Recently, exploratory experiments performed in the Liquid Argon Purification Cryostat (PuLArC — ∼90 L of LAr) had been successfully used to purify LAr from N2 using an innovative solid adsorbent based on a Li-FAU Molecular Sieve. Here, we report experiments of N2 capturing in LAr carried out at the ICEBERG Cryostat (∼3000 L of LAr) at Fermilab. For the experiments, several controlled injections of N2 were made into the cryostat, and the impurity concentrations in the LAr (both for N2 and O2) were monitored using a calibrated gas analyzer during the purification process. The experimental data confirmed that the Li-FAU is capable of capturing the N2 from the LAr. A numerical methodology based on the mass and energy balances of the system was applied to better understand the behavior of the adsorption process and to help with the scale-up of the process. A Pore Diffusion Model (PDM) coupled with parameter optimization was proposed to predict the N2 concentration in the ICEBERG cryostat over time. The model parameters applied in this work were determined based on experimental data acquired in the PuLArC. The model was able to accurately reproduce the data from the ICEBERG, indicating that the mathematical model could be a valuable tool to design and operate the GAr/LAr system of LBNF-DUNE. It was possible to predict from simulations the necessary time to reach the required purity from an initial contamination concentration and also the number of purification cycles until solid saturation.
Evaluation of the potassium incorporation method in MgFe catalysts derived from layered double hydroxides in the hydrogenation of CO2
Rosembergue Gabriel Lima Gonçalves, Gabriel Liscia Catuzo, José Mansur Assaf, Elisabete Moreira Assaf
Catalysis Today, 2025
Comparing the performance of CuO dispersive media for O2 capturing in Liquid Argon
A.M. Caffer, R.G. Gonçalves, H.B. Pizzi, D.S. Passos, M.H. Carvalho, et al.
Journal of Instrumentation, 2025
In this work, we have explored the potential of oxygen capture in Liquid Argon (LAr) of the innovative CuO dispersive layered double hydroxide media (R-LDH) and the Ce-doped R-LDH. Low-temperature experiments in the LAr Purification Cryostat (PuLArC) at IFGW/Unicamp were performed using LAr circulation through two filters, one containing the R-LDH (or the Ce-doped R-LDH) material and the other the BASF commercial copper material (Cu-02265 — proposed as a reference O2 getter media by Fermilab) for comparison. Interestingly, the experiments performed in PuLArC revealed that the R-LDH and Ce-doped R-LDH innovative media were capable of capturing O2 from recirculating LAr in PuLArC. For instance, the R-LDH media reduced the O2 contaminants concentration by 80% of its initial values after 200 min of LAr circulation. As for the reference media BASF Cu-S0226, this media reduced the O2 concentration by 40% of its initial value in the same time window. The performance/kg of the studied media will be compared and we will discuss the putative higher potential of the innovative Ce-doped and pure R-LDH media for O2 capturing in LAr which may invoke further tests of these media in larger scale LAr cryostats, possibly at Fermilab and CERN.
Influence of La2O3 Addition on CuO/CeO2 Catalysts for the Water-Gas Shift Reaction
Tatiana de Freitas Silva, José Mansur Assaf, Alessandra Fonseca Lucrédio, Cristhiane Guimarães Maciel Reis, Karina Arruda Almeida
Langmuir, 2025
CuO/CeO2 and CuO/xCeO2-yLa2O3 catalysts, synthesized with varying CeO2 and La2O3 molar ratios (1:1, 1:2, and 2:1), were prepared via the hydrothermal method and tested in the water-gas shift reaction (150-350 °C). La2O3 addition altered structural properties, reducing surface area and copper dispersion. XANES and in situ XRD confirmed metallic Cu species during reduction and reaction. Catalytic tests revealed CuO/CeO2 excelled at low temperatures, while La2O3-doped catalysts, especially CuO/1CeO2-1 La2O3, performed better at 250-350 °C. Stability tests showed La2O3-doped catalysts resisted deactivation and sintering better than CuO/CeO2, even with CO2 and H2 in the feed.
Impact of the copper load on the performance of Cu/UiO-67 in CO2 hydrogenation to ethanol at atmospheric pressure
Luana do Nascimento Rocha de Paula, Janaina Fernandes Gomes, José Mansur Assaf
Catalysis Today, 2025
Improving Coking Resistance and Catalytic Performance of Ni Catalyst from LaNiO3 Perovskite by Dispersion on SBA-15 Mesoporous Silica for Hydrogen Production by Steam Reforming of Ethanol
Isa Carolina Silva Costa, Elisabete Moreira Assaf, José Mansur Assaf
Topics in Catalysis, 2024
A strategic option for the production of H2 from renewable resources is use of the ethanol steam reforming reaction. Catalysts based on nickel have been widely investigated for this reaction, offering the advantages of low cost and high activity. However, a difficulty is that nickel may be strongly deactivated by coke formation. Perovskite-type mixed oxides are promising precursors for nickel-based catalysts, since their reduction leads to the formation of highly dispersed metal particles that can mitigate carbon deposition. However, high calcination temperatures are required for perovskite structure formation, resulting in low surface areas and limiting the effectiveness of this method. In order to address this difficulty, the present work proposes a novel strategy whereby the perovskite-type oxide LaNiO3 is supported on SBA-15. Characterization of the catalysts was performed using XRF, XRD, SEM, TPR, TEM, BET, H2-TPD, and TGA techniques. Their performances were then evaluated in catalysis of the ethanol steam reforming reaction to produce hydrogen. Calcination at 750 °C resulted in formation of highly dispersed perovskite on a support that presented high specific surface area. The catalyst obtained from reduced LaNiO3/SBA-15 with 33 wt% perovskite was the most active in the reaction. Analyses using TGA and SEM showed the formation of carbon mainly over Ni catalysts obtained from bulk LaNiO3 perovskite, while supporting LaNiO3 on SBA-15 led to lower deposition of carbon. The superior performance of this material in catalysis could be attributed to the dispersion of the perovskite on SBA-15, resulting in smaller size of the Ni metal particles formed during the reduction, compared to the catalyst derived from bulk perovskite. This promising method could be used in the production of a wide range of other catalysts.
Syngas production via methane tri-reforming on Ni/La2O3–αAl2O3 catalysts
Brazilian Journal of Chemical Engineering, 2024
CO2 Hydrogenation to Methanol over Mesoporous SiO2-Coated Cu-Based Catalysts
Luiz H. Vieira, Marco A. Rossi, Letícia F. Rasteiro, José M. Assaf, Elisabete M. Assaf
ACS Nanoscience Au, 2024
Innovative proposal for N2 capturing in Liquid Argon using the Li-FAU molecular Sieve
Dilson Cardoso, Ettore Segreto, Ivana Cruz, Edilene Deise da Silva, Iago William Zapelini, et al.
Journal of Instrumentation, 2024
Recent Understanding of Water-Assisted CO2 Hydrogenation to Alcohols
Luiz H. Vieira, Alisson H. M. da Silva, Cássia S. Santana, Elisabete M. Assaf, José M. Assaf, et al.
Chemcatchem, 2024
Investigation of intermediates formation in the CO2 hydrogenation to methanol reaction over Ni5Ga3-ZrO2-SBA-15 materials prepared via ZrO2 atomic layer deposition
Letícia F. Rasteiro, José M. Assaf, Elisabete M. Assaf
Applied Surface Science, 2024
Effects of the potassium incorporation in Fe–Ce–Zr based catalysts and activation condition in CO2 hydrogenation to C2/C3 olefins at atmospheric pressure
Ananda Vallezi Paladino Lino, Luiz Henrique Vieira, Elisabete Moreira Assaf, José Mansur Assaf
International Journal of Hydrogen Energy, 2024
Introduction to high-value chemicals and energy production from CO2
Gabriel L. Catuzo, Ananda V.P. Lino, Elisabete M. Assaf, José M. Assaf, Rita M.B. Alves
Advances and Technology Development in Greenhouse Gases Emission Capture and Conversion Carbon Dioxide Conversion to Chemicals and Energy, 2024
Supported Cu catalysts on UiO-66 toward enhanced methanol selectivity by CO2 hydrogenation: Effect of Cu loading
Francielle Candian Firmino Marcos, Maria Jose Fonseca Costa, Gabriel L. Catuzo, Daniel Angeli de Moraes, Marcos de Oliveira Junior, et al.
Journal of Catalysis, 2023
Investigation of In Promotion on Cu/ZrO2 Catalysts and Application in CO2 Hydrogenation to Methanol
Marco A. Rossi, Letícia F. Rasteiro, Luiz H. Vieira, Marco A. Fraga, José M. Assaf, et al.
Catalysis Letters, 2023
Cooperative effect of Pt and Cu on CeO2 for the CO-PROX reaction under CO2–H2O feed stream
Aline R.M. Cruz, Luiz H. Vieira, Elisabete M. Assaf, Janaina F. Gomes, José M. Assaf
International Journal of Hydrogen Energy, 2023
Noble Metals in Recent Developments of Heterogeneous Catalysts for CO2 Conversion Processes
Luiz H. Vieira, Letícia F. Rasteiro, Cássia S. Santana, Gabriel L. Catuzo, Alisson H. M. da Silva, et al.
Chemcatchem, 2023
Enhancing Catalytic Performance with Sol-Gel Hydrotalcite-Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation
Alberth Renne Gonzalez Caranton, Fernando Stavale, Emilia Annese, Carolina Gaioto, Nohemi Raquel Checca, et al.
Chemcatchem, 2023
Ethanol formation from CO2 hydrogenation at atmospheric pressure using Cu catalysts: Water as a key component
Alisson H.M. da Silva, Luiz H. Vieira, Cássia S. Santanta, Marc T.M. Koper, Elisabete M. Assaf, et al.
Applied Catalysis B Environmental, 2023
Highly porous CuZnAl layered double hydroxides prepared by biochar-templated co-precipitation method as catalysts for the preferential oxidation of CO reaction
Rosembergue Gabriel Lima Gonçalves, Davi Domingos Petrolini, Francielle Candian Firmino Marcos, José Mansur Assaf, Elisabete Moreira Assaf
Applied Clay Science, 2023
The role of copper crystallization and segregation toward enhanced methanol synthesis via CO2 hydrogenation over CuZrO2 catalysts: A combined experimental and computational study
Francielle C.F. Marcos, Raphael S. Alvim, Lili Lin, Luis E. Betancourt, Davi D. Petrolini, et al.
Chemical Engineering Journal, 2023
In situ study of low-temperature dry reforming of methane over La2Ce2O7 and LaNiO3 mixed oxides
Adriana P. Ramon, Xiansheng Li, Adam H. Clark, Olga V. Safonova, Francielle C. Marcos, et al.
Applied Catalysis B Environmental, 2022

RECENT SCHOLAR PUBLICATIONS

Effect of Synthesis Methods for ZnZrOx Oxides Associated with SAPO-34 on the Production of Light Olefins By CO2 Hydrogenation
AVP Lino, EM Assaf, JM Assaf
Catalysis Letters 156 (5), 143 , 2026
2026
Ethanolic Transesterification with Methyl Acetate Catalyzed by SBA-15 Functionalized with Imidazolium–Sulfonic Groups
F Gazola, I Zapelini, J Assaf
Crystals 16 (4), 258 , 2026
2026
Uso de surfactantes orgânicos na síntese de catalisadores de CuO-ZnO para hidrogenação de CO2 a metanol
RA Angeli, GM de Paula, JM Assaf, JF Gomes
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Catalisadores Funcionais para a Produção de Hidrocarbonetos via Fischer–Tropsch: Ênfase nas Rotas de Síntese
LNR de Paula, GM de Paula, LA Branco, JM Assaf, JF Gomes
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Efeito da carga de Cu e Fe na hidrogenação do CO2 para etanol sobre catalisadores CuFe/ZIF-8
ME Ribeiro, GL Catuzo, JM Assaf, EM Assaf
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Aplicação de catalisadores zeolíticos multifuncionais para conversão direta do furfural em γ-valerolactona
Y Lima, L Vieira, J Assaf, E Assaf
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Hidrogenação catalítica do CO2 à metanol sob óxidos de terras raras combinados com ZnO
WD de Macêdo Souza, JM Assaf
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Eficiência de Catalisadores ZnO-CeO2/H+-ZSM-5 na Conversão Catalítica de CH4 e CO2 em Ácido Acético
G de Freitas Lopes, AF Lucrédio, LH Vieira, JF Gomes, JM Assaf, ...
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Influência do precursor do catalisador CuO-ZnO na hidrogenação de CO2 a metanol
GM de Paula, RA Angeli, LNR de Paula, JM Assaf, JF Gomes
23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
2025
Oxidative Coupling of Methane
GL Catuzo, LF Rasteiro, LB Lopes, LH Vieira, JM Assaf, EM Assaf
2025
Enhanced oxygen mobility in NiAg alloy catalysts for methane dry reforming: The role of AgO nanoparticles
ARG Caranton, AVP Lino, C Macchiutti, NRC Huaman, E Annese, ...
Catalysis Today 455, 115316 , 2025
2025
Citations: 3
CuO-ZnO Oxides Derived from Lamellar Structures As Catalysts for the Hydrogenation of CO 2 to Methanol
RA Angeli, JF Gomes, L Paula, J Assaf, JF Gomes
The 29th North American Catalysis Society Meeting , 2025
2025
Hollow Iron-Based LDH Structures Applied to Low-Temperature Rwgs Reaction
RGL Gonçalves, PR Kasala, J Assaf, J Rodriguez, E Assaf
The 29th North American Catalysis Society Meeting , 2025
2025
Impact of the Metal Center (Zr or Hf) of the Cu/Uio-67 on the Catalytic Performance for Alcohols Production Via CO 2 Hydrogenation
LNR de Paula, JF Gomes, JM Assaf
The 29th North American Catalysis Society Meeting , 2025
2025
Exploring N 2 capturing in Liquid Argon using Li-FAU Mol Sieve in the Iceberg Cryostat
P Bianchi Neto, R Soccol Junior, FM Blaszczyk, S Koshelev, A Hahn, ...
Journal of Instrumentation 20 (06), C06045 , 2025
2025
Citations: 1
Ensuring High-Purity Liquid Argon for the LBNF FDC: Collaborative Cryogenics Research Between UNICAMP and Fermilab
R Doubnik, M Adamowski, C Adriano, TPM Alegre, EM Assaf, JM Assaf, ...
No journal information , 2025
2025
Citations: 1
Evaluation of the potassium incorporation method in MgFe catalysts derived from layered double hydroxides in the hydrogenation of CO2
RGL Goncalves, GL Catuzo, JM Assaf, EM Assaf
Catalysis Today 448, 115166 , 2025
2025
Citations: 1
Comparing the performance of CuO dispersive media for O 2 capturing in Liquid Argon
AM Caffer, RGL Gonçalves, HB Pizzi, DS Passos, MH Carvalho, C Reis, ...
Journal of Instrumentation 20 (03), C03043 , 2025
2025
Impact of the K and Fe insertion methods in KFeCeZr catalysts on the CO2 hydrogenation to C2/C3 olefins at room pressure
AVP Lino, LH Vieira, EM Assaf, JM Assaf
Chemical Engineering Science 302, 120898 , 2025
2025
Citations: 6
Influence of La 2 O 3 Addition on CuO/CeO 2 Catalysts for the Water–Gas Shift Reaction
T de Freitas Silva, JM Assaf, AF Lucrédio, CGM Reis, KA Almeida
Langmuir 41 (5), 3108-3120 , 2025
2025
Citations: 14

MOST CITED SCHOLAR PUBLICATIONS

High efficiency steam reforming of ethanol by cobalt-based catalysts
MS Batista, RKS Santos, EM Assaf, JM Assaf, EA Ticianelli
Journal of Power Sources 134 (1), 27-32 , 2004
2004
Citations: 337
Characterization of the activity and stability of supported cobalt catalysts for the steam reforming of ethanol
MS Batista, RKS Santos, EM Assaf, JM Assaf, EA Ticianelli
Journal of Power Sources 124 (1), 99-103 , 2003
2003
Citations: 302
Structural features of La1− xCexNiO3 mixed oxides and performance for the dry reforming of methane
SM Lima, JM Assaf, MA Pena, JLG Fierro
Applied Catalysis A: General 311, 94-104 , 2006
2006
Citations: 272
Evaluation of the performance of Ni/La2O3 catalyst prepared from LaNiO3 perovskite-type oxides for the production of hydrogen through steam reforming and oxidative steam …
SM de Lima, AM da Silva, LOO da Costa, JM Assaf, G Jacobs, BH Davis, ...
Applied Catalysis A: General 377 (1-2), 181-190 , 2010
2010
Citations: 219
Influence of calcium content in Ni/CaO/γ-Al2O3 catalysts for CO2-reforming of methane
JAC Dias, JM Assaf
Catalysis today 85 (1), 59-68 , 2003
2003
Citations: 206
Catalytic evaluation of perovskite-type oxide LaNi1− x RuxO3 in methane dry reforming
GC Araujo, SM Lima, JM Assaf, MA Peña, JLG Fierro, ...
Catalysis Today 133, 129-135 , 2008
2008
Citations: 163
Autothermal reforming of methane over Ni/γ-Al 2O3 catalysts: the enhancement effect of small quantities of noble metals
JAC Dias, JM Assaf
Journal of power sources 130 (1), 106-110 , 2004
2004
Citations: 163
Dry reforming of methane on Ni–Mg–Al nano-spheroid oxide catalysts prepared by the sol–gel method from hydrotalcite-like precursors
AR González, YJO Asencios, EM Assaf, JM Assaf
Applied Surface Science 280, 876-887 , 2013
2013
Citations: 156
Hydrogen production by steam reforming of ethanol over Ni-based catalysts promoted with noble metals
LPR Profeti, JAC Dias, JM Assaf, EM Assaf
Journal of Power Sources 190 (2), 525-533 , 2009
2009
Citations: 131
Hydrogen production through oxidative steam reforming of ethanol over Ni-based catalysts derived from La 1-x Ce x NiO 3 perovskite-type oxides
SM de Lima, AM da Silva, LOO da Costa, JM Assaf, LV Mattos, R Sarkari, ...
Applied Catalysis B: Environmental , 2012
2012
Citations: 129
Methane conversion reactions on Ni catalysts promoted with Rh: Influence of support
AF Lucrédio, JM Assaf, EM Assaf
Applied Catalysis A: General 400 (1-2), 156-165 , 2011
2011
Citations: 125
Influence of the supramolecular structure and physicochemical properties of cellulose on its dissolution in a lithium chloride/N, N-dimethylacetamide solvent system
LA Ramos, JM Assaf, OA El Seoud, E Frollini
Biomacromolecules 6 (5), 2638-2647 , 2005
2005
Citations: 124
Ni–Fe catalysts based on perovskite-type oxides for dry reforming of methane to syngas
SM de Lima, JM Assaf
Catalysis Letters 108 (1), 63-70 , 2006
2006
Citations: 121
Electrocatalytic CO2 reduction to C2+ products on Cu and CuxZny electrodes: effects of chemical composition and surface morphology
AHM da Silva, SJ Raaijman, CS Santana, JM Assaf, JF Gomes, ...
Journal of Electroanalytical Chemistry 880, 114750 , 2021
2021
Citations: 95
Reforming of a model biogas on Ni and Rh–Ni catalysts: Effect of adding La
AF Lucrédio, JM Assaf, EM Assaf
Fuel Processing Technology 102, 124-131 , 2012
2012
Citations: 94
Insights into the methanol synthesis mechanism via CO2 hydrogenation over Cu-ZnO-ZrO2 catalysts: Effects of surfactant/Cu-Zn-Zr molar ratio
FCF Marcos, L Lin, LE Betancourt, SD Senanayake, JA Rodriguez, ...
Journal of CO2 Utilization 41, 101215 , 2020
2020
Citations: 91
Effect of nature of ceria support in CuO/CeO2 catalyst for PROX-CO reaction
CG Maciel, TF Silva, MI Hirooka, MN Belgacem, JM Assaf
Fuel , 2012
2012
Citations: 86
Noble Metals in Recent Developments of Heterogeneous Catalysts for CO 2 Conversion Processes
LH Vieira, LF Rasteiro, CS Santana, GL Catuzo, AHM da Silva, JM Assaf, ...
ChemCatChem 15 (14), e202300493 , 2023
2023
Citations: 83
La 1− x Ca x NiO 3 Perovskite Oxides: Characterization and Catalytic Reactivity in Dry Reforming of Methane
SM De Lima, MA Pena, JLG Fierro, JM Assaf
Catalysis letters 124 (3), 195-203 , 2008
2008
Citations: 80
Insights into the alloy-support synergistic effects for the CO2 hydrogenation towards methanol on oxide-supported Ni5Ga3 catalysts: An experimental and DFT study
LF Rasteiro, RA De Sousa, LH Vieira, VK Ocampo-Restrepo, LG Verga, ...
Applied Catalysis B: Environmental 302, 120842 , 2022
2022
Citations: 74

Jose Mansur Assaf

RESEARCH INTERESTS

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS