Article
Energy & Fuels
Norshakirah Ahmad Rashidi, Elnida Mustapha, Yeow Yean Theng, Noor Azira Abdul Razak, Najihah Abdul Bar, Khairul Basyar Baharudin, Darfizzi Derawi
Summary: Waste cooking oil is an attractive feedstock for producing advanced biofuels due to its low cost and abundant availability. This study focused on the synthesis and analysis of mesoporous bimetallic catalysts for the catalytic deoxygenation of waste cooking oil. The results showed that the catalyst with 10% Ni-Fe/SBA-15 had the highest liquid yield but low selectivity towards the diesel fraction, while the catalyst with 5% Ni-Co/SBA-15 had the highest selectivity towards the diesel fraction.
Article
Chemistry, Applied
Vahide Nuran Mutlu, Selahattin Yilmaz
Summary: The glycosidation of glucose with n-butanol was studied using sulphated Zr and tungstophosphoric acid incorporated SBA-15 catalysts, showing improved acidity and higher yields of butyl glucoside. The TPA-SBA-15 catalyst demonstrated the highest activity and selectivity, with stable and reusable performance. Further studies on reaction temperature and catalyst amount were conducted to optimize the reaction parameters.
Article
Engineering, Chemical
Rafael F. Perez, Luiz E. P. Borges, Marco A. Fraga
Summary: The study found that Zr-SBA-15 mesoporous catalysts can effectively convert xylose to furfuryl alcohol, but the activity and product distribution are significantly affected by the ratio of water to 2-propanol in the liquid phase.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Argam Akopyan, Polina D. Polikarpova, Nina Arzyaeva, Alexander Anisimov, Olga Maslova, Olga Senko, Elena N. Efremenko
Summary: This study investigated the effect of the hydrophobicity of mesoporous silicate SBA-15 on the catalytic activity and service life in the peroxide oxidation of sulfur-containing compounds. The immobilization of molybdate anion on SBA-15 support resulted in lower reaction temperature and longer catalyst lifespan. The hydrophobic catalyst showed insensitivity to initial sulfur content and hydrogen peroxide amount, retaining activity for at least six oxidation cycles.
Article
Engineering, Environmental
Hongbiao Tang, Qiqi Dai, Yang Cao, Xiaocui Wei, Khalil Jibran, Jin Li
Summary: The novel IL/Zr-SBA-15 catalyst showed promising catalytic activity for HDO of phenol, leading to significant improvement in conversion rate and yield, while maintaining good stability even after multiple uses.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Lifang Chen, Jin An Wang, Natali de la Fuente, Sinong Zhou, Peng Jiang, Yueqin Song, Xiaolong Zhou
Summary: This study focuses on the roles of structural defects, surface acidity, and catalytic properties of phosphotungstic acid grafted on Zr-doped MCM-41 catalysts in oxidative desulfurization, demonstrating the importance of these factors in improving catalytic activity for ultralow-sulfur fuel production.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Rui Tang, Niamat Ullah, Zhenhua Li
Summary: Introducing promoters on Ni-based catalysts has been proven to enhance their performance in CO2 methanation. The correlation between the promotion mechanism and the reaction pathway is significant for designing efficient catalysts. In this study, Zr-promoted SBA-15 supported Ni catalysts were prepared, and it was found that the addition of citric acid improved CH4 selectivity and the presence of Zr species on the support activated CO2. The ZrNi-1.7(CI) catalyst showed excellent catalytic performance with high CO2 conversion and CH4 selectivity, as well as good stability without carbon deposits after 50 hours of testing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhe Zhang, Jian Wang, Ming Chen, Tao Zhang, Biao Yang, Xuelian Peng, Du Tian, Linfeng Zhang, Huadong Wu, Jia Guo
Summary: Y-SBA-15 was synthesized by doping yttrium into SBA-15 using a solvent-free solid-state grinding method, and [Bmim] PMoO was also synthesized. The amphiphilic catalyst 25[Bmim] PMoO/10Y-SBA-15 exhibited high catalytic activity in ODS, and sulfur compounds can be removed completely within a short period of time.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Arzu Kanca, Zeynep Alpsoy, Osman Nuri Ata
Summary: Coal is widely used as a fossil fuel resource, and clean coal technologies can improve the efficiency of clean energy production. This study aims to develop efficient sorbents to remove H2S from hot flue gas. Ca-based binary mixed metal oxides were synthesized as sulfur sorbents, and their crystal structure and surface properties were analyzed. The desulfurization performance of the sorbents was examined using a simulated gas mixture, and the sorbent with the best performance was identified.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Zhuoyi Ren, Qibin Yuan, Chunyan Dai, Linhua Zhu
Summary: Oxidative desulfurization (ODS) using heteropolyacid catalysts has been demonstrated to be an efficient method for removing aromatic sulfur compounds from diesel oils. In this study, a series of novel imidazole-based heteropolyacid catalysts were prepared for deep ODS of fuel, achieving a high desulfurization performance of up to 99.9% under mild conditions. The catalyst also exhibited excellent recovery performance, maintaining a desulfurization activity of 97.7% after seven cycles. Density functional theory calculation revealed that the imidazole-based heteropolyacid catalyst had a lower energy barrier compared to phosphotungstic acid catalyst.
Article
Chemistry, Physical
Jesus Miguel Ramos, Jin An Wang, Sergio Odin Flores, Lifang Chen, Ulises Arellano, Luis Enrique Norena, Julio Gonzalez, Juan Navarrete
Summary: This study reports the ultrasound-assisted hydrothermal synthesis of V2O5 dispersed on SBA-15 and Zr doped SBA-15 catalysts for DBT oxidation reaction. It found that Lewis acidity significantly affects DBT conversion and proposed two pathways for DBT oxidation reaction.
Article
Energy & Fuels
Yang Liu, Junjie Liao, Liping Chang, Weiren Bao
Summary: This paper investigates the adsorption performance of silver-modified mesoporous materials in removing thiophenic compounds. The results show that the adsorption of thiophene by the sorbents involves S-Ag and pi complexation reactions, and the adsorption efficiency is greatly affected by benzene. XPS analysis reveals that silver interacts strongly with the carrier and forms Ag-O-Si bonds as the active centers for thiophenic compounds. The Mulliken charges of sulfur atoms have an impact on the interactions between silver and thiophene sulfur compounds.
Article
Engineering, Chemical
Santhana Krishnan Perumal, Umasankar Samidurai, Venu Gopal Balashanmugam, Hyun Sung Kim, Preeti Aghalayam
Summary: High surface area mesoporous solid support is used to develop cost-effective catalysts for NOx abatement at low temperatures. In this study, Al, Ti, and Zr were incorporated into SBA-15, a high surface area mesoporous material, through a direct synthesis approach. The developed MnCu bimetallic catalyst, supported by the modified SBA-15, showed superior deNOx activity for SCR of NO with NH3 at temperatures as low as 260 degrees C. Physicochemical studies were conducted on the catalysts, and the optimal deNOx condition and activity were discussed. The exceptional deNOx activity can be attributed to the morphology, oxygen vacancies, and high ratio of Mn3+ + Mn4+/Mn on the catalyst surface.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mohammed Hachemaoui, Bouhadjar Boukoussa, Issam Ismail, Adel Mokhtar, Inas Taha, Jibran Iqbal, Salih Hacini, Abdelkader Bengueddach, Rachida Hamacha
Summary: This work involves the preparation of mesoporous silica SBA-15 functionalized with different amines to stabilize copper nanoparticles for catalytic reduction of dyes. The nature of the functionalized amines significantly influences the size and dispersion of copper nanoparticles, with triamine functionalized SBA-15 showing the best performance. The catalyst Cu@SBA-3 exhibited complete conversion of MB to Leuco-MB within 3 minutes and promising selectivity for the reduction of OG dye.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Zhentao Chen, Bo Wang, Haoxuan Yang, Tao Jiang, Jiahuan Yu, Jianxun Wu, Chunming Xu
Summary: This study validates that the diffusion of vanadyl porphyrins is significantly hindered in catalyst pores, which has a pronounced effect on the reaction. The diffusion effect is larger for vanadyl-TPP than vanadyl octaethylporphine, attributed to its higher intrinsic activity and more severe diffusion resistance. The restrictive correlation is more severe than the theoretical prediction, resulting from the non-spherical configuration of reactants and simultaneous counter diffusion of products.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
C. I. Morgan, S. P. Paredes, S. O. Flores, S. Alfaro
Article
Materials Science, Multidisciplinary
E. I. Moreno-Valencia, S. P. Paredes-Carrera, J. C. Sanchez-Ochoa, S. O. Flores-Valle, J. R. Avendano-Gomez
MATERIALS RESEARCH EXPRESS
(2017)
Article
Chemistry, Applied
Maria Manriquez-Ramirez, Ricardo Gomez, J. G. Hernandez-Cortez, Abel Zuniga-Moreno, Carmen M. Reza-San German, Sergio O. Flores-Valle
Article
Energy & Fuels
Felipe Sanchez-Minero, Jorge Ancheyta, Guadalupe Silva-Oliver, Sergio Flores-Valle
Article
Biochemistry & Molecular Biology
Sergio Odin Flores-Valle, Omar Rios-Berny, Jorge Chanona-Perez, Tomas Fregoso-Aguilar, Jose A. Morales-Gonzalez, Oscar Jesus Prado-Rubianes, Rafael Herrera-Bucio, Pablo Lopez-Albaran, Angel Morales-Gonzalez, Vicente Garibay-Febles, Enrique Godinez Dominguez, Christian Kennes, Ma. Carmen Veiga-Barbazan, Jorge Alberto Mendoza-Perez
Article
Chemistry, Applied
R. E. Peralta-Robledo, C. E. Santolalla-Vargas, F. Sanchez-Minero, Victor Santes, S. O. Flores-Valle, O. Elizalde Solis
Article
Biochemistry & Molecular Biology
Rosa Martha Perez Gutierrez, Abraham Heriberto Garcia Campoy, Silvia Patricia Paredes Carrera, Alethia Muniz Ramirez, Jose Maria Mota Flores, Sergio Odin Flores Valle
Article
Chemistry, Multidisciplinary
Isis S. Rodriguez-Clavel, Silvia P. Paredes-Carrera, Sergio O. Flores-Valle, Eri J. Paz-Garcia, Jesus C. Sanchez-Ochoa, Rosa M. Perez-Gutierrez
JOURNAL OF CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Eri J. Paz-Garcia, Silvia P. Paredes-Carrera, Sergio O. Flores-Valle, Isis S. Rodriguez-Clavel, Jesus C. Sanchez-Ochoa, Rosa M. Perez-Gutierrez
APPLIED SCIENCES-BASEL
(2019)
Article
Chemistry, Applied
Y. Zarazua-Aguilar, S. P. Paredes-Carrera, J. C. Sanchez-Ochoa, J. R. Avendano-Gomez, S. O. Flores-Valle
REVISTA MEXICANA DE INGENIERIA QUIMICA
(2017)
Article
Chemistry, Applied
M. C. Lopez-Chavez, G. Osorio-Revilla, S. Arellano-Cardenas, T. Gallardo-Velazquez, S. O. Flores-Valle, Ms. Lopez-Cortez
REVISTA MEXICANA DE INGENIERIA QUIMICA
(2017)
Article
Chemistry, Multidisciplinary
Elim Albiter Escobar, Miguel Angel Valenzuela Zapata, Salvador Alfaro Hernandez, Sergio Odin Flores Valle, Omar Rios Berny, Victor Jesus Gonzalez Angeles, Ivan Cordova Reyes
JOURNAL OF THE MEXICAN CHEMICAL SOCIETY
(2010)
Article
Food Science & Technology
Rosa Martha Perez-Gutierrez, Alethia Muniz-Ramirez, Abraham Heriberto Garcia Campoy, Jose Maria Mota Flores, Sergio Odin Flores
FUNCTIONAL FOODS IN HEALTH AND DISEASE
(2018)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.