Article
Energy & Fuels
Dalia Liuzzi, Francisco J. Perez-Alonso, Sergio Rojas
Summary: Ru-Co/Al2O3 and Ru-Fe/Al2O3 catalysts prepared by reduction-deposition method exhibit high activity in Fischer-Tropsch Synthesis, showing different conversion rates and product selectivity. The interaction between Ru and Co in Ru-Co/Al2O3 enhances the activity, while Ru-Fe/Al2O3 displays superior initial performance but declines over time, with less enriched products compared to Ru/Al2O3.
Article
Energy & Fuels
Agija Stanke, Valdis Kampars
Summary: The transportation sector's significant contribution to greenhouse gas emissions has prompted the search for sustainable and renewable alternatives to fossil fuels. This study focused on the synthesis of mesoporous Fe/SBA-15 catalysts using natural clays as binders and promoters. The results showed that catalysts agglomerated with kaolin exhibited better performance, and catalysts in powdered form had higher CO conversion rates.
Article
Green & Sustainable Science & Technology
P. Jain, M. Chimote, C. P. Vinod
Summary: Bimetallic nanoparticles with synergistic effects can enhance the catalytic activity, selectivity, and stability of solid materials. The study synthesized Au@Co core-shell bimetallic nanoparticles and demonstrated efficient and stable CO conversion in the FT reaction.
MATERIALS TODAY SUSTAINABILITY
(2021)
Review
Chemistry, Physical
Zahra Gholami, Zdenek Tisler, Vlastimil Rubas
Summary: The Fischer-Tropsch (FT) process is a promising method for producing liquid fuels and valuable chemicals through CO hydrogenation. Catalyst activity and product selectivity are influenced by parameters such as support and promoters, which affect metal-support interaction, crystallite size, and more. This paper reviews the history of the FT process, the impact of different supports and promoters on cobalt-based catalyst performance, and the importance of proper reactor design for handling the heat of the exothermic reaction.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Kristina Mazurova, Aleksandr Glotov, Mikhail Kotelev, Oleg Eliseev, Pavel Gushchin, Maria Rubtsova, Anna Vutolkina, Ruslan Kazantsev, Vladimir Vinokurov, Anna Stavitskaya
Summary: A nanoarchitectural approach was used to load mesoporous halloysite nanotubes with RuCo nanoparticles for Fischer-Tropsch catalysis. The resulting catalyst exhibited high activity, low selectivity to methane and CO2, high selectivity to C5+ hydrocarbons, and a chain growth index of 0.853. The choice of reducing agent during synthesis played a crucial role in the reducibility and selectivity of the RuCo catalysts.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Energy & Fuels
Hong Du, Miao Jiang, Hejun Zhu, Chuande Huang, Ziang Zhao, Wenda Dong, Wei Lu, Tao Liu, Z. Conrad Zhang, Yunjie Ding
Summary: A highly efficient activated carbon supported cobalt based catalyst for Fischer-Tropsch synthesis was prepared and activated through multistep processes, exhibiting superior performance in CO conversion and CH4 selectivity compared to conventional catalysts. The catalyst's excellent performance was attributed to its increased amount of active sites and dominant hcp metallic cobalt phases. Further improvements in catalytic performance were achieved by adjusting the content of hcp metallic cobalt phase stacking through proper treatment conditions in the multistep activation method.
Article
Chemistry, Applied
C. F. Toncon-Leal, J. F. Munera, J. J. Arroyo-Gomez, K. Sapag
Summary: Iron, cobalt, and bimetallic catalysts were synthesized and impregnated on mesoporous silica support to study their behavior in Fischer-Tropsch Synthesis. Bimetallic catalysts exhibited higher catalytic activity than monometallic catalysts.
Article
Chemistry, Physical
Sophia Mohammadnasabomran, Carlos Marquez-Alvarez, Joaquin Perez-Pariente, Agustin Martinez
Summary: Grafting aluminum onto SBA-15 improves Co dispersion and results in a more homogeneous distribution of metal species. However, the Al-grafted CoRu/Al-SBA-15 catalyst shows lower activity in Fischer-Tropsch synthesis compared to the all-silica CoRu/SBA-15 counterpart, but exhibits enhanced selectivity towards liquid hydrocarbons.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lebohang Macheli, Emanuela Carleschi, Bryan P. Doyle, Gerard Leteba, Eric van Steen
Summary: Metal-support interactions in inverse catalysts prepared by adsorbing TEOS on Co3O4 can be manipulated by varying the solvent mixture. Deposition of TEOS on Co3O4 nanoparticles in n-hexane results in the formation of silica oligomers interacting strongly with cobalt(II,III)oxide after calcination at 573 K. Modification of Co3O4 nanoparticles with TEOS in a hydrolysing environment results in a stronger interaction due to the formation of surface cobalt silicate through hydrolysis.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Madita Einemann, Simon Haida, Nico Fischer, Nattawut Osakoo, Jatuporn Wittayakun, Frank Roessner
Summary: The role of cobalt chloride hexahydrate as a precursor of cobalt bulk catalysts was investigated for the Fischer-Tropsch reaction. Different oxygen-containing cobalt compounds were detected through in situ DRIFTS, in situ XANES, in situ XRD, and inverse TPR techniques. The reaction network of cobalt chloride transformation was discussed, taking into account the back mixing in different geometries of measuring cells. The choice of catalyst activation procedure is important for the formation of cobalt oxide and subsequent activity in the Fischer-Tropsch reaction.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xin Li, Yao Chen, Shize Liu, Ning Zhao, Xiangning Jiang, Meng Su, Zhenhua Li
Summary: This study investigated the impact of the combination of Co-based catalysts and HZSM-5 on product distribution in Fischer-Tropsch synthesis. Results showed that proximity and reaction temperature significantly affected the selectivity, providing guidance for the rational design of bifunctional catalysts.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Yanping Chen, Lixuan Ma, Riguang Zhang, Runping Ye, Wei Liu, Jiatong Wei, Vitaly V. Ordomsky, Jian Liu
Summary: This study reports the design of a low-cost and scalable carbon-supported iron catalyst (K-Fe/NC) with tunable alcohol selectivity in Fischer-Tropsch synthesis. The catalyst exhibits a core-shell structure and facilitates the investigation of iron structural evolution. The dissociation and association of CO are thoroughly verified through theoretical calculations and experimental reactions. The synergistic effect between chi-Fe5C2/epsilon-Fe2C and Fe3O4 dual active sites is proposed as the mechanism for alcohol formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Kun Gong, Yao Wei, Tiejun Lin, Xingzhen Qi, Fanfei Sun, Zheng Jiang, Liangshu Zhong
Summary: By designing alloy carbide structures to maximize the interface of dual active sites, a highly efficient catalyst for the selective synthesis of higher oxygenates from syngas has been developed. The catalyst showed excellent stability and achieved high selectivity and yield of oxygenates.
Article
Chemistry, Physical
Chelsea L. Tucker, Yatheshthrao Ragoo, Silethukuthula Mathe, Lebohang Macheli, Ankur Bordoloi, Tulio C. R. Rocha, Sandeeran Govender, Patricia J. Kooyman, Eric van Steen
Summary: The addition of manganese to cobalt-based Fischer-Tropsch catalysts improves their activity and liquid fuel yield by reducing CO2 and CH4 selectivity. DFT calculations suggest that the promotion of manganese is associated with improved oxygen removal from the catalytically active surface, leading to reduced selectivity towards CO2 and increased liquid fuel yield.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Chemical
Nikita Sharkov, Zahra Gholami, Ivana Hradecka, Zdenek Tisler, Josef Simek
Summary: This study compared the catalytic activity and product selectivity of cobalt and iron catalysts supported on SBA-15, with and without a carbide phase and reduction treatment before the reaction. The presence of carbide phase and reduction treatment were found to significantly influence the catalytic behavior and product selectivity. The findings provide new insights into the role of carbide in the performance of cobalt and iron catalysts in Fischer-Tropsch synthesis.
Article
Chemistry, Applied
M. Lam-Maldonado, J. A. Melo-Banda, D. Macias-Ferrer, B. Portales-Martinez, J. M. Dominguez, R. Silva-Rodrigo, U. Paramo-Garcia, J. M. Mata-Padilla
Article
Chemistry, Applied
O. Morelos-Santos, A. I. Reyes de la Torre, P. Schacht-Hernandez, B. Portales-Martinez, I. Soto-Escalante, A. M. Mendoza-Martinez, R. Mendoza-Cruz, J. Jesus Velazquez-Salazar, M. Jose-Yacaman
Summary: In this study, the effect of NiFe2O4 nanoparticles as catalysts in heavy crude oil upgrading under low hydrogen/feedstock ratio was investigated. The experiments showed that the nanoparticles significantly improved the efficiency of heavy oil upgrading.
Article
Chemistry, Physical
Pedro Martin Garcia-Vite, Brenda Lizeth Reyes-Garcia, Cynthia Lucero Valdez-Hernandez, A. L. Martinez-Salazar
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Physical
M. A. Coronel-Garcia, J. G. Salazar-Barrera, J. J. Malpica-Maldonado, A. L. Martinez-Salazar, J. A. Melo-Banda
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Green & Sustainable Science & Technology
A. L. Martinez-Salazar, J. A. Melo-Banda, M. A. Coronel-Garcia, Jj. Gonzalez-Barbosa, J. M. Dominguez-Esquivel
Article
Chemistry, Applied
O. Morelos-Santos, A. Reyes de la Torre, J. A. Melo-Banda, A. M. Mendoza-Martinez, P. Schacht-Hernandez, B. Portales-Martinez, I Soto-Escalante, J. M. Dominguez-Esquivel, M. Jose-Yacaman
TOPICS IN CATALYSIS
(2020)
Article
Chemistry, Inorganic & Nuclear
Alejandro Serrano-Maldonado, Antonio Reina, Benjamin Portales-Martinez, Itzel Guerrero-Rios
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Energy & Fuels
Yosadara Ruiz-Morales, Alma Delia Miranda-Olvera, Benjamin Portales-Martinez, J. M. Dominguez
Article
Energy & Fuels
Gabriela Barbosa-Moreno, Adriana Isabel Reyes de la Torre, Nohra Violeta Gallardo-Rivas, Benjamin Portales-Martinez, Oscar Morelos Santos, Mayda Lam-Maldonado, Jose Aaron Melo Banda, Margarita Garcia-Hernandez, Ana Maria Mendoza Martinez
Summary: This study investigates the use of ionic liquid materials as stabilizers for water-oil emulsions, particularly in the case of heavy oils. The findings reveal that the alkyl chain length of the ionic liquids has an impact on the stability of the emulsion, with longer chain lengths resulting in better performance.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Alfredo Guevara-Lara, Acela Lopez-Benitez, Gilles Berhault, Jose Aaron Melo-Banda, Rebeca Silva-Rodrigo
Summary: The present study investigates the effect of adding cerium oxide to NiMo/Al2O3 hydrodesulfurization catalysts. The results show that the pH of impregnation used influences the final HDS activity more than the amount of cerium, with an optimum observed using 1 mol% of cerium and a pH of impregnation of 9. The analysis of spectroscopy results suggests that impregnation under basic conditions helps to improve the dispersion of the cerium oxide phase onto the alumina support, leading to a significant increase in HDS activity.
TOPICS IN CATALYSIS
(2022)
Article
Green & Sustainable Science & Technology
Jose Antonio Cabello Mendez, Jose de Jesus Perez Bueno, Yunny Meas Vong, Benjamin Portales Martinez
Summary: This study investigates the formation of cerium hydroxide and evaluates its capacity as a corrosion inhibitor on aluminum substrates. By immersing the substrate in a solution of cerium nitrate and hydrogen peroxide, the cerium particles are deposited on the surface. The morphological and chemical analysis of the coatings were performed, and the electrochemical corrosion behavior was studied. The results show that the presence of cerium particles can both inhibit and promote corrosion, depending on the immersion time and concentration.
Article
Chemistry, Inorganic & Nuclear
Israel T. Pulido-Diaz, Alejandro Serrano-Maldonado, Carlos Cesar Lopez-Suarez, Pedro A. Mendez-Ocampo, Benjamin Portales-Martinez, Aida Gutierrez-Alejandre, Karla P. Salas-Martin, Itzel Guerrero-Rios
Summary: The study demonstrates that nicotinamide groups grafted on ordered mesoporous silica (OMS) can serve as stabilizers for RhNPs used as catalysts, forming spherical rhodium nanoparticles with a narrow size distribution. On the contrary, amine-functionalized OMS tends to form RhNP aggregates after catalytic reactions, affecting the reaction efficiency. Supported RhNPs also exhibit selective reduction of different groups and show high activity in reductive amination reactions.
DALTON TRANSACTIONS
(2021)
