Article
Chemistry, Physical
Jia Liu, Xiaoren Wu, Yaqi Chen, Yang Zhang, Tengfei Zhang, Hongmei Ai, Qing Liu
Summary: Two catalysts, impregnated Ni/CeO2 with an array structure and phyllosilicate-based Ni/SiO2 prepared by hydrothermal method, were designed for CO2 methanation. The Ni/CeO2 catalyst showed small Ni particle size and more oxygen vacancies, resulting in enhanced CO2 activation and high low-temperature activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Applied
Yan Xu, Hongri Wan, Xihua Du, Bing Yao, Shuai Wei, Yan Chen, Wenchang Zhuang, Huamei Yang, Limei Sun, Xumei Tao, Peng Wang
Summary: A highly active Ni/CeO2/SiO2 catalyst is developed by a combustion-impregnation method for CO2 methanation. The addition of CeO2 promoter enhances the catalyst reducibility and facilitates CO2 activation. The optimal performance is achieved on the Ni-5Ce catalyst with small Ni particles and an optimal amount of CeO2 promoter.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhihe Zhang, Zihang Yu, Kai Feng, Binhang Yan
Summary: In this study, the introduction of Eu3+ to Ni/CeO2 is found to enhance the Ni-CeO2 interaction, leading to higher dispersion and more interfacial sites. This results in improved catalytic activity for CO2 methanation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Thuy Ha Nguyen, Han Bom Kim, Eun Duck Park
Summary: CO2 methanation using ceria-supported cobalt catalysts with low cobalt contents was studied. The catalytic performance and physicochemical properties were influenced by the preparation method and treatment temperature. Among the catalysts tested, the ceria-supported cobalt catalyst prepared by wet impregnation method and calcined in air at 500 degrees C, then reduced in H-2 at 500 degrees C, showed the best catalytic performance.
Article
Engineering, Environmental
Yan Resing Dias, Oscar W. Perez-Lopez
Summary: Mitigating CO2 emissions has become an important issue nowadays, and converting CO2 to CH4 as a natural gas substitute and H2 storage source is an interesting alternative. In this study, Ni/SiO2 catalysts promoted by Fe, Co and Zn were prepared and showed improved performance in CO2 conversion to methane, with Ni-Co/SiO2 achieving the best results in terms of CO2 conversion and CH4 selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Yu Xie, Jianjun Chen, Xi Wu, Junjie Wen, Ru Zhao, Zonglin Li, Guocai Tian, Qiulin Zhang, Ping Ning, Jiming Hao
Summary: This study investigates the relationship between the active-site structure and CO2 methanation mechanism over Ni-based catalysts. The results show that Ni/CeO2 nanorods with enriched frustrated Lewis pair (FLP) structures exhibit higher CO2 conversion and methane selectivity at low temperatures.
Article
Energy & Fuels
Run-Ping Ye, Lin Liao, Tomas Ramirez Reina, Jiaxu Liu, Durgaiah Chevella, Yonggang Jin, Maohong Fan, Jian Liu
Summary: The study introduces an improved sol-gel method for loading Ni-MOF onto a silica support to create a Ni/SiO2 catalyst. The catalyst demonstrates excellent catalytic performance under low temperature and high GHSV conditions, with high CO2 conversion and CH4 selectivity. This work provides a groundbreaking strategy for loading MOF derived catalysts and may offer insights for preparing highly dispersed Ni/SiO2 catalysts.
Article
Chemistry, Physical
Ning Rui, Xiaoshan Zhang, Feng Zhang, Zongyuan Liu, Xinxiang Cao, Zhenhua Xie, Rui Zou, Sanjaya D. Senanayake, Yanhui Yang, Jose A. Rodriguez, Chang-Jun Liu
Summary: The Ni/CeO2 catalyst prepared via gas discharge plasma and hydrogen reduction shows high activity in CO2 methanation at low temperatures, with excellent CH4 formation rate and redox property. The unique interfacial structure and metal-support interaction lead to the formation of rich interfacial Ni-CeO2 sites, improving the catalyst's performance significantly in H-2 splitting and CO2 activation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Paola Riani, Ioannis Valsamakis, Tullio Cavattoni, Vicente Sanchez Escribano, Guido Busca, Gabriella Garbarino
Summary: Ni-based catalysts with enhanced thermal stability and catalytic performance for CO2 methanation have been synthesized, and it was found that La2O3 plays a promoting role in the reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(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.
Article
Chemistry, Physical
Jinchuan Zhang, Yingju Yang, Jing Liu, Bo Xiong
Summary: Ni/CeO2 is considered a potentially efficient catalyst for CO2 methanation, with strong metal-support interaction and Ni nanocluster as the most active site for CO2 activation. The main reaction pathway is governed by RWGS + CO-hydro pathway, with H-assisted C-O bond breakage as the rate-limiting step.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Zhongliang Huang, Yujia Yuan, Miaomiao Song, Zhimian Hao, Jingran Xiao, Dongren Cai, Abdul-Rauf Ibrahim, Guowu Zhan
Summary: The study demonstrates the importance of Pt/Ni ratio in determining the product selectivity in CO2 hydrogenation. Methane becomes the major product only when the Ni/Pt ratio is increased to 9. The enrichment of Pt on the catalyst surface is crucial for improving catalytic performance and stability.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Viktoria Golovanova, Maria Chiara Spadaro, Jordi Arbiol, Viacheslav Golovanov, Tapio T. Rantala, Teresa Andreu, Joan Ramon Morante
Summary: The study utilizes solar light harvesting in the thermocatalytic approach to carbon dioxide methanation, revealing a dual effect of incident photons on the catalytic properties of the Ni/CeO2 catalyst. The approach increases the reaction rate up to 2.4 times and decreases power consumption by 20% under solar illumination, replacing conventional thermal activation with a green energy source.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Parisa Shafiee, Seyed Mehdi Alavi, Mehran Rezaei, Farzad Jokar
Summary: Fe, Mn, La, Ce, and Ba-promoted 15 wt%Ni-12.5 wt%Co-Al2O3 catalysts show improved catalytic performance in CO2 methanation reaction, with the Fe-promoted catalyst exhibiting the highest catalytic activity. The study also evaluated the effect of calcination temperature, feed composition, and gas hourly space velocity (GHSV) on the catalyst performance, confirming the Fe-promoted catalyst's superior performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Sakhon Ratchahat, Sethanat Surathitimethakul, Anyanee Thamungkit, Phanatchakorn Mala, Masao Sudoh, Ryo Watanabe, Choji Fukuhara, Season S. Chen, Kevin C-W Wu, Tawatchai Charinpanitkul
Summary: In this study, Ni/CeO2 catalysts were prepared using different heating methods and a one-step co-precipitation method. The catalysts contained highly crystalline CeO2 and NiO nanoparticles with good dispersion. The catalysts showed promising CO2 methanation activity, with the MW method demonstrating superior catalytic performance.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Multidisciplinary
Thien An Le, Tae Wook Kim, Sae Ha Lee, Eun Duck Park
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2017)
Article
Chemistry, Applied
Thien An Le, Min Sik Kim, Sae Ha Lee, Eun Duck Park
TOPICS IN CATALYSIS
(2017)
Article
Chemistry, Applied
Thien An Le, Jong Kyu Kang, Eun Duck Park
TOPICS IN CATALYSIS
(2018)
Article
Engineering, Environmental
Thien An Le, Hoang Vu Ly, Jinsoo Kim, Seung-Soo Kim, Jae Hyung Choi, Hee-Chul Woo, Mohd Roslee Othman
CHEMICAL ENGINEERING JOURNAL
(2014)
Article
Chemistry, Multidisciplinary
Thien An Le, Jong Kyu Kang, Sae Ha Lee, Eun Duck Park
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2019)
Article
Chemistry, Physical
Thien An Le, Jong Kyu Kang, Eun Duck Park
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Chemistry, Physical
Thien An Le, Jieun Kim, Yu Ri Jeong, Eun Duck Park
Article
Chemistry, Applied
Thien An Le, Jieun Kim, Jong Kyu Kang, Eun Duck Park
Article
Chemistry, Applied
Thien An Le, Jieun Kim, Jong Kyu Kang, Eun Duck Park
Article
Chemistry, Physical
Thien An Le, Youngmin Kim, Hyun Woo Kim, Su-Un Lee, Jeong-Rang Kim, Tae-Wan Kim, You-Jin Lee, Ho-Jeong Chae
Summary: In this study, Ru-doped LaxCe1-xOy composites were investigated for NH3 decomposition to generate COx-free H-2. The catalyst Ru/La0.33Ce0.67 showed superior catalytic activity and stability, highlighting the importance of Ru size and interaction with the composite for enhanced NH3 decomposition.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Chemistry, Multidisciplinary
Thien An Le, Quoc Cuong Do, Youngmin Kim, Tae-Wan Kim, Ho-Jeong Chae
Summary: The emerging H-2 economy is facing challenges in storage and transport, with recent attention on using ammonia (NH3) as a COx-free source of H-2 via NH3 decomposition. Noble Ru-based catalysts are efficient but costly, while Ni-based catalysts are considered a good alternative due to their low cost. Challenges still exist in improving the efficiency of both Ru- and Ni-based systems.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Youngmin Kim, Jeong-Rang Kim, Tae-Wan Kim, You-Jin Lee, Ho-Jeong Chae, Quoc Cuong Do, Thien An Le, Geo Jong Kim
Summary: Ni/Al(1)Ce(a)O(x) composites prepared by various synthetic methods, especially the one-pot CADH method, showed outstanding catalytic performance in ammonia decomposition for hydrogen generation. The Ce-containing catalysts exhibited superiority over Ni/Al2O3 catalyst due to the synergistic effects of NiO reducibility, surface oxygen vacancies, basicity, and Ni-support interaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Michaela Prachthauser, Jeffrey E. Cassisi, Thien-An Le, Andel Nicasio
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2020)
Article
Chemistry, Applied
Thien An Le, Min Sik Kim, Sae Ha Lee, Tae Wook Kim, Eun Duck Park
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.