Article
Chemistry, Physical
Penghui Yan, Eric Kennedy, Michael Stockenhuber
Summary: Ion-exchanged Ru/ZSM-5 and Ru/BEA catalysts show high intrinsic HDO activity with finely dispersed metal particles interacting strongly with oxygen atoms. High H2 adsorption activity facilitates hydrogenation reaction, while acid sites play a pivotal role in deoxygenation reaction.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Hui Wang, Wenru Zhao, Mooeez Ur Rehman, Wei Liu, Yuxi Xu, Huijiang Huang, Shengping Wang, Yujun Zhao, Donghai Mei, Xinbin Ma
Summary: In this study, a series of CuPSNT catalysts were prepared and applied in the HDO reaction of phenol, achieving high cyclohexane yield. The synergy between Cu0 and Cu+ species in the catalyst was found to play a critical role in the phenol HDO process.
Article
Chemistry, Applied
Zhiquan Yu, Kaibo Yao, Yao Wang, Yunlong Yao, Zhichao Sun, Yingya Liu, Chuan Shi, Wei Wang, Anjie Wang
Summary: Three representative nickel phosphides were characterized and compared in terms of their structure and catalytic performance. The transfer of electron density between Ni and P decreased with increasing Ni/P molar ratio, as did the total acid amounts. In the hydrodeoxygenation reaction of phenol, the nickel phosphides exhibited different activation energy orders for the hydrogenation of phenol.
Article
Chemistry, Applied
Qi Wang, Jinlei Chen, Xingyong Li, Xinyu Yang, Yankun Wu, Shuirong Li, Yueyuan Ye, Duo Wang, Dechao Wang, Zhifeng Zheng
Summary: This study reports the application of Ni supported red mud (RM) for efficient hydrodeoxygenation (HDO) of waste oils to produce carbon-based biofuels. The results show that low-temperature calcination of RM leads to good dispersion of Ni and a larger specific surface area, while high-temperature calcination results in sintering of metal oxides and lower Ni dispersion. Ni/RM-500 exhibits the best catalytic performance with a high conversion rate.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Zhensheng Shen, Gewei Zhang, Chengxiang Shi, Juncong Qu, Lun Pan, Zhenfeng Huang, Xiangwen Zhang, Ji-Jun Zou
Summary: The synthesis of fuels from lignin bio-oil feedstock helps to solve energy crises and reduce environmental pollution. Alkylation of phenol, the simplest model compound for lignin bio-oil feedstocks, has gained attention for fuel production. In this study, a one-pot strategy using bifunctional Pt/H beta catalysts was developed for synthesizing high-density polycyclic alkane fuels from phenol and cyclohexanol. The optimized conditions achieved high conversions and selectivity, making it a promising method for the direct synthesis of fuel from lignin oil or other biomass compounds.
Article
Chemistry, Inorganic & Nuclear
Qiao Han, Hui Wang, Mooeez Ur Rehman, Xin Shang, Haijun Chen, Na Ji, Xinli Tong, Hui Shi, Yujun Zhao
Summary: The phyllosilicate-derived NiFe/SiO2-AE catalyst showed significantly high catalytic performance in the hydrodeoxygenation of phenol to cyclohexane. The synergy between the Ni-Fe alloy and metallic Ni sites, enhanced by the AE strategy, ensures superior intrinsic activity in the HDO process.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Penghui Yan, Jim Mensah, Matthew Drewery, Eric Kennedy, Thomas Maschmeyer, Michael Stockenhuber
Summary: The study investigates the impact of support properties on the hydrodeoxygenation of guaiacol and biocrude oil using Ru-based catalysts. Lower Si/Al ratio of support leads to higher cyclo-hexane yield in guaiacol HDO. Ru/BEA shows high activity for both guaiacol and biocrude oil HDO.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Heyu Li, Minghua Liu, Wenqi Zou, Yuancai Lv, Yifan Liu, Lihui Chen
Summary: Ni-metal-organic frameworks (MOFs) were used as precursors to synthesize carbon-supported nickel composites (Ni@C). The hydrodeoxygenation properties of model compounds and corncob lignin were studied without an external hydrogenation source and initial pressure. The degradation of model compounds, corncob lignin, and benzyl phenyl ether (BPE) with Ni@C under different conditions was investigated. Isopropanol was found to be an effective in situ hydrogen source, achieving high conversion percentages and yields of phenol.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Tianqi Chen, Ohhun Kwon, Renjing Huang, Chao Lin, John M. Vohs
Summary: Decorating the surface of a Ni catalyst with WOx enhances the HDO selectivity of m-cresol, indicating the reaction proceeds via a direct HDO pathway. XPS analysis shows synergistic interactions between WOx and Ni help maintain a high concentration of oxygen vacancies in monolayer WOx.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Md Zakir Hossain, Md Razaul Karim, Sourav Sutradhar, Muhammad Badrul Islam Chowdhury, Paul A. Charpentier
Summary: By synthesizing nickel nanoparticles on supported mesoporous alumina and controlling their size, the efficiency and yield of hydrogen production in hydrothermal gasification can be significantly improved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Soumyadeep Chakrabortty, Nils Rockstroh, Stephan Bartling, Henrik Lund, Bernd H. Mueller, Paul C. J. Kamer, Johannes G. de Vries
Summary: In this study, alkyl cyclohexanes were synthesized with high selectivity via a combined hydrogenation/hydrodeoxygenation of aromatic ketones using ligand-free RhCl3 as pre-catalyst in trifluoroethanol as solvent. The true catalyst, rhodium nanoparticles, was generated in situ during the reaction. Various conjugated and non-conjugated aromatic ketones were successfully converted to saturated cyclohexane derivatives under relatively mild conditions, with the solvent playing a crucial role in determining the selectivity of ketone hydrogenation. Using water as a solvent resulted in the formation of cyclohexyl alkyl-alcohols as products.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Fei Wang, Robert Pace, Yaying Ji, Jianchun Jiang, Xiaoxiang Jiang, Anna Krystianiak, Olivier Heintz, Gilles Caboche, Eduardo Santillan-Jimenez, Mark Crocker
Summary: In this study, the catalytic activity of Ni catalysts in the decarboxylation/decarbonylation of triglycerides to hydrocarbons was improved by employing Pd as a promoter and using multifunctional supports. Pd addition promoted Ni reduction, leading to an increase in the number of active sites. The use of SiO2-Al2O3 as a support further enhanced the catalyst performance by promoting Ni reduction, as well as providing a high surface area and strong acidity.
Article
Chemistry, Physical
Guilherme de Souza Garrido, Lucas Ribeiro Francisco, Raimundo C. Rabelo-Neto, Yutao T. Xing, John Munera, Jonas Marcelle, Gary Jacobs, Fabio B. Noronha
Summary: This study investigates the effect of different vanadia loadings on the performance of Pd/VOx/SiO2 catalysts for the gas phase hydrodeoxygenation (HDO) of phenol. In situ XANES experiments reveal a mixture of V2O4 and V4O7 species for all catalysts after reduction. In situ XRD and XANES show that the close contact between Pd particles and VOx species is likely due to the presence of polymerized vanadate species.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Zhiquan Yu, Yunlong Yao, Yao Wang, Yan Li, Zhichao Sun, Ying-Ya Liu, Chuan Shi, Jiaxu Liu, Wei Wang, Anjie Wang
Summary: The bifunctional Ni3P/gamma-Al2O3 catalyst was prepared using a specific method and exhibited good dispersion of nanoparticles, high performance in the hydrodeoxygenation of phenol, and remarkable stability in catalytic activity and structure during long-term operation.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Mengting Chen, Qifeng Zhong, Jiao Ma, Zhiyang Zhang, Yingxin Liu, Zuojun Wei, Shuguang Deng
Summary: In this study, non-noble Ni-Mn/SiO2 catalysts with low Ni loading were designed for the selective hydrogenation of levulinic acid (LA) to gamma-valerolactone (GVL). The catalyst exhibited excellent activity, selectivity, and reusability, providing new insights for the rational design of non-noble metal catalysts for the conversion of LA to GVL.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Applied
C. E. Santolalla-Vargas, V Santes, Claudio Ortega-Nino, A. Hernandez-Gordillo, Felipe Sanchez-Minero, L. Lartundo-Rojas, Raul Borja-Urby, J. C. Lopez-Curiel, Oscar Goiz, I. I. Padilla-Martinez
Article
Food Science & Technology
Elizabeth Gordillo-Cruz, Daniel Gomez-Luria, Omar U. Valdes-Martinez, Jose A. De los Reyes-Heredia, Jose Alvarez-Ramirez, Eduardo J. Vernon-Carter
Article
Chemistry, Applied
R. E. Peralta-Robledo, C. E. Santolalla-Vargas, F. Sanchez-Minero, Victor Santes, S. O. Flores-Valle, O. Elizalde Solis
Article
Chemistry, Applied
C. E. Santolalla-Vargas, Victor Santes, Elizabeth Gomez, Felipe Sanchez-Minero, Issis Romero-Ibarra, O. Goiz, L. Lartundo-Rojas, Leonardo Diaz, Rosario Luna-Ramirez, J. A. de los Reyes, O. U. Valdes
Article
Engineering, Chemical
O. J. Solis Marcial, A. Najera Bastida, J. E. Banuelos, O. U. Valdes Martinez, L. A. Luevano, B. Serrano Rosales
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2019)
Article
Materials Science, Ceramics
Mariano Casas-Luna, Jorge Alberto Torres-Rodriguez, Omar Uriel Valdes-Martinez, Nina Obradovic, Karel Slamecka, Karel Maca, Jozef Kaiser, Edgar B. Montufar, Ladislav Celko
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
H. Cervantes-Cuevas, M. Jimenez-Hernandez, G. Chavez-Esquivel, Dwight Acosta, J. A. Tavizon-Pozos, C. E. Santolalla-Vargas, A. Talavera-Lopez
MATERIALS RESEARCH EXPRESS
(2020)
Article
Chemistry, Applied
Esthela Ramos-Ramirez, Norma L. Gutierrez-Ortega, Francisco Tzompantzi-Morales, Arturo Barrera-Rodriguez, J. C. Castillo-Rodriguez, Clara Tzompantzi-Flores, Carlos E. Santolalla-Vargas, Maria del Pilar Guevara-Hornedo
TOPICS IN CATALYSIS
(2020)
Article
Chemistry, Applied
C. E. Santolalla-Vargas, Victor Santes, V. A. Suarez-Toriello, J. A. de los Reyes, B. Pawelec, J. L. G. Fierro, E. Dominguez Garcia, L. Oliviero, F. Mauge
Summary: In this study, NiW/gamma-Al2O3 catalysts were prepared with the structural control of the nickel ion precursor using a chelating agent. The influence of sulfidation pressure on the catalysts' activity and structure was investigated, with catalysts prepared under high pressure showing the highest HDS activity. The addition of a chelating agent and sulfidation under high pressure also led to improved catalytic activity and butene-over-butane ratio.
Article
Chemistry, Physical
Jose P. Ruelas-Leyva, Luis F. Maldonado-Garcia, Alfonso Talavera-Lopez, Ivan A. Santos-Lopez, Lorenzo A. Picos-Corrales, Carlos E. Santolalla-Vargas, Sergio A. Gomez Torres, Gustavo A. Fuentes
Summary: This study synthesized and evaluated a series of Pt-Sn bimetallic catalysts, finding that bimetallic catalysts were more active than those containing only Pt, and that there were two types of coke deposits on the catalyst surface.
Review
Energy & Fuels
Jesus Andres Tavizon-Pozos, Gerardo Chavez-Esquivel, Victor Alejandro Suarez-Toriello, Carlos Eduardo Santolalla-Vargas, Oscar Abel Luevano-Rivas, Omar Uriel Valdes-Martinez, Alfonso Talavera-Lopez, Jose Antonio Rodriguez
Summary: Alkaline earth metal oxides are gaining popularity as catalysts for biodiesel production due to their availability, non-toxicity, reusability, low cost, and high concentration of surface basic sites. Strategies to improve surface basic sites density and strength, as well as stability and reusability, include mixing or supporting these oxides, as well as modifying acid-base properties and avoiding catalyst leaching. Additionally, the impact of various operation conditions on oil transesterification reactions is reviewed to determine the optimal parameters for different oils.
Article
Chemistry, Physical
Diego Alvarez-Bustos, Felipe Sanchez-Minero, Victor Santes, Issis Claudette Romero-Ibarra, Jose Antonio de los Reyes Heredia, Reyna Rios-Escobedo, Francisco Tzompantzi-Morales, Carlos Eduardo Santolalla-Vargas
Summary: The study evaluated the photocatalytic activity of FeS-2Cl/TiO2 catalyst on visible-light degradation of phenol, showing significantly improved degradation compared to unmodified TiO2.
Article
Engineering, Environmental
F. Cancino-Trejo, Victor Santes, Juan Alberto Alcantara Cardenas, Marisol Gallardo, Yadira G. Maldonado, A. Lopez Miranda, Omar Valdes, J. A. de los Reyes, C. E. Santolalla-Vargas
Summary: Ni/Al2O3 and NiFe/Al2O3 catalysts were studied for oxidative dehydrogenation of ethane to ethylene. NiFe32 catalyst showed the highest activity, possibly due to the spinel-type structure and the predominance of Ni and Fe in tetrahedral symmetry.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
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.
