Article
Chemistry, Physical
Tae-Young Kim, Seongbin Jo, Yeji Lee, Suk-Hwan Kang, Joon-Woo Kim, Soo-Chool Lee, Jae-Chang Kim
Summary: Fe-Ni and Co-Fe-Ni catalysts were prepared using the wet impregnation method for high-calorific synthetic natural gas production. The addition of nickel increased the formation of Ni-Fe alloy, promoted metal dispersion, and decreased the reduction temperature, leading to higher CO conversion rates. A higher Ni amount in the catalysts resulted in increased C1-C4 hydrocarbon production and reduced byproduct formation. Among the catalysts tested, the 5Co-15Fe-5Ni/gamma-Al2O3 catalyst showed the highest light hydrocarbon yield and lowest byproduct formation.
Article
Engineering, Chemical
Jeongyoon Ahn, Woojin Chung
Summary: Greenhouse gases, generated largely in the energy sector, are the main cause of global warming. The need for technology that reduces greenhouse gas emissions while producing energy has led to increased attention on CCU technology, which uses CO2 to produce synthetic natural gas (SNG). This study focused on CO2 methanation and examined the efficiency and durability of CO gas, rather than CO2 and H-2 gas, in the reaction.
Review
Acoustics
Ingrid V. Machado, Jhonathan R. N. dos Santos, Marcelo A. P. Januario, Arlene G. Correa
Summary: By utilizing ultrasound-assisted multicomponent reactions under heterogeneous catalysis, it is possible to efficiently synthesize biologically active organic compounds with reduced costs and energy consumption.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Chalempol Khajonvittayakul, Vut Tongnan, Suksun Amornraksa, Navadol Laosiripojana, Matthew Hartley, Unalome Wetwatana Hartley
Summary: CO2 methanation was studied using monometallic catalysts Ni, Fe, and Co on CeO2-Cr2O3 support. Among them, Ni-based catalyst showed the best performance, with 40% NiO/CeO2-Cr2O3 achieving the highest CO2 conversion rate of 97.67% and 100% CH4 selectivity at 290°C. The catalytic stability of NiO/CeO2-Cr2O3 was also tested over 50 hours, showing good stability in terms of catalytic activity.
Review
Chemistry, Physical
A. H. Hatta, A. A. Jalil, N. S. Hassan, M. Y. S. Hamid, A. F. A. Rahman, L. P. Teh, D. Prasetyoko
Summary: This paper provides a detailed overview of bimetallic catalysts for CO methanation, including the synthesis method and its effect on physicochemical characteristics. The bimetallic catalyst can enhance reaction effectiveness by adjusting the interaction between metal-support and metal-metal, and it also improves particle size and dispersion. The paper also presents the mechanism of CO methanation over the bimetallic catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Patryk Blaszczak, Marcin Zajac, Agata Ducka, Krzysztof Matlak, Barbara Wolanin, Sea-Fue Wang, Anna Mandziak, Beata Bochentyn, Piotr Jasinski
Summary: In this study, a series of SOECs modified with a small amount of Co ions were used to investigate the synergy between transition metals for enhancing electrochemical and chemical activity. The addition of Co significantly increased the concentration of CH4 and improved the electrochemical efficiency of water and CO2 co-electrolysis. The characterization analysis revealed the mechanism of synergy between Ni and Co host metals and identified the causes of increased activity. Additionally, a novel discovery was made regarding the catalytic performance of NiCo2O4 spinel structure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Fatemeh Zarei-Jelyani, Fatemeh Salahi, Mohammad Farsi, Mohammad Reza Rahimpour
Summary: Steam methane reforming is an important reaction for producing environmentally-friendly hydrogen from methane. In this study, Ni-Co co-impregnated catalysts were synthesized using a hollow sphere alumina support, leading to improved stability and performance. Among the catalysts tested, Ni-2-Co-1/H-Al2O3 showed the highest methane conversion and hydrogen yield at 700 ℃.
Article
Chemistry, Physical
Seung Ju Han, Tsegay Gebrekidan Gebreyohannes, Sung Woo Lee, Seok Ki Kim, Hyun Woo Kim, Jungho Shin, Yong Tae Kim
Summary: In this study, MeFe-SiO2 (Me = Co, Ni, Pd, Pt) catalysts with bimetallic sites entrapped in a highly crystalline SiO2 structure were successfully synthesized and used for the conversion of methane to olefins, aromatics, and hydrogen (MTOAH) at 1020 degrees C. The presence of Pt in 0.5Pt1.0Fe-SiO2 catalyst enhanced methane conversion and hydrocarbon selectivity by inhibiting coke deposition. Density functional theory calculations confirmed the energetically favorable role of Pt-Fe3C surface in methane activation.
MOLECULAR CATALYSIS
(2023)
Article
Engineering, Environmental
Tao Xie, Zhen-Yu Zhang, Hao-Ye Zheng, Kai-Di Xu, Zhun Hu, Yu Lei
Summary: Developing new highly efficient catalytic techniques for solar photo-thermal-chemical conversion is crucial. In this paper, a Ni/mesoporous TiO2 photothermal catalyst was prepared and applied to methane dry reforming. Results showed that the prepared catalyst exhibited superior catalytic performance compared to reported catalysts. The synergistic effect of photothermal catalysis significantly improved product formation rates and reactant conversions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yuan Gao, Liguang Dou, Shuai Zhang, Lijun Zong, Jie Pan, Xiucui Hu, Hao Sun, Kostya (Ken) Ostrikov, Tao Shao
Summary: Research utilized highly-adjustable pulsed power and nickel foam based catalysts to achieve high-performance plasma-enabled CO2 methanation. In-situ optical diagnosis, zero-dimension kinetic modelling, and in-line electrical measurements provided insights into the synergistic effect on electron-induced reaction and vibrational distributions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Multidisciplinary Sciences
Natalia Pino, Jennifer Quinchia, Santiago Gomez, Juan F. Espinal, Alejandro Montoya, Diana Lopez
Summary: The study found that the bimetallic Pt-Co/SiO2 catalyst is more stable and active in the hydrodeoxygenation reaction compared to monometallic Pt/SiO2 and Co/SiO2. The product distribution is influenced by the catalyst type and reaction time, with the presence of an organic solvent having minimal impact on product yields.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Chemistry, Physical
Defang Liang, Yishuang Wang, Mingqiang Chen, Xuanlan Xie, Chang Li, Jun Wang, Liang Yuan
Summary: This study successfully synthesized a highly efficient Ni-Co alloy catalyst, which can effectively treat greenhouse gases and produce high-value products through methane dry reforming. The research provides important guidance for the development of clay-based metallic Ni catalysts and their applications in syngas production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Jinqiang Zhang, Kun Xie, Yichen Jiang, Meng Li, Xiaojie Tan, Ye Yang, Xiaoli Zhao, Liang Wang, Yinfeng Wang, Xiaoyuan Wang, Yuezhao Zhu, Haijun Chen, Mingbo Wu, Hongqi Sun, Shaobin Wang
Summary: A comprehensive mechanistic investigation of bimetal NiCo/SiO2 in photothermo- and thermocatalytic DRM reveals that Co substitution inhibits thermocatalysis but promotes the reaction under light irradiation. Energetic hot carriers in the NiCo alloy under light irradiation directly activate reactant molecules and overcome thermodynamic barriers, selectively promoting the generation of CO. Thus, NiCo/SiO2 achieves higher photo-to-thermal efficiency and prominent performance in photothermal catalytic DRM.
Article
Chemistry, Physical
Dong Ji, Peng Guo, Yongjie Xi, Jinlei Li, Jia Wang, Tingting Wang, Fuwei Li
Summary: Selective tandem hydrogenation of bulk phthalic anhydride to produce hexahydrophthalide is achieved using phosphorus-promoted Ni-Co bimetallic alloy nanoparticle catalysts. The catalyst's surface composition can be controlled to enhance selectivity and stability of the tandem process. The optimized Ni3Co1@NC-P catalyst exhibits 88% selectivity for the desired product and shows promising stability.
Article
Biochemistry & Molecular Biology
Abbas Amini, Azadeh Fallah, Ahmad Sedaghat, Ahmad Gholami, Chun Cheng, Anju R. Gupta
Summary: Natural phosphate and synthetic fluorapatite phosphate have been proposed as stable, inexpensive, readily available, and recyclable catalysts for the synthesis of quinoxaline at room temperature. Natural phosphate showed higher catalytic activity compared to synthetic fluorapatite phosphate, and the recycling process did not significantly impact the catalytic property of natural phosphate.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Lin Zhang, Qian Zhang, Yi Liu, Yi Zhang
APPLIED SURFACE SCIENCE
(2016)
Article
Chemistry, Physical
Yi Liu, Zhenhao Li, Bin Wang, Yi Zhang
Article
Chemistry, Multidisciplinary
Yi Liu, Wei Sheng, Zhanggui Hou, Yi Zhang
Article
Chemistry, Physical
Yi Liu, Yuliu Liu, Yi Zhang
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
Sanpeng Zhang, Dailin Li, Yi Liu, Yi Zhang, Qing Wu
Article
Chemistry, Physical
Yi Liu, Yuliu Liu, Qing Wu, Yi Zhang
CATALYSIS COMMUNICATIONS
(2019)
Article
Chemistry, Physical
Yi Liu, Fangxu Lu, Yu Tang, Minyang Liu, Franklin Feng Tao, Yi Zhang
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Chemistry, Physical
Debing Li, Zhikai Liu, Yi Liu, Yi Zhang
Article
Chemistry, Physical
Yiming Chen, Baocheng Qiu, Yi Liu, Yi Zhang
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Chemistry, Physical
Jiacheng Ji, Ying Xu, Yi Liu, Yi Zhang
CATALYSIS COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Baocheng Qiu, Yakun Zhang, Yi Liu, Yi Zhang
Summary: The utilization of Pt@HZSM-5 catalyst has achieved efficient and stable conversion of ethane to ethylene, avoiding issues such as coke deposition and aromatization. It does not require regeneration and shows relatively high ethane conversion rate under severe reaction conditions.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Applied
Yunshan Shang, Yi Liu, Delin Yuan, Jingyun Chen, Hua Liu, Fu-Kuo Chiang, Hui Wei, Aihua Xing, Shengfu Ji
Summary: In this study, bifunctional catalysts composed of SAPO-34 zeolite and Mn-doped ZnCrAlOy oxide were used for the direct conversion of syngas to light olefins. It was found that Mn doping could decrease the particle size of ZnCrAlOy spinel and increase the formation of oxygen vacancies, which protected more light olefins and intermediates from hydrogenation.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xu Pan, Xin Huang, Ruizhuang Wang, Haiyong Zhang, Hui Wei, Jingyun Chen, Suyao Liu, Liping Sun, Deping Xu, Yi Liu
Summary: The preparation of zeolite catalysts with a silicalite-1 outer layer can enhance the selectivity of p-xylene, suppress carbon deposition, and improve the separation efficiency of p-xylene from other isomers.
Article
Chemistry, Physical
Lin Zhang, Dong-Xue Gu, Yi Liu, Yi Zhang
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.