Article
Chemistry, Physical
Hui Wang, Hao Zhu, Yuelan Zhang, Jianglong Pu
Summary: In this study, a series of Ni/Ce catalysts were synthesized with the assistance of CTAB, and their performance was evaluated. The results showed that CTAB improved the pore structure and reducibility of the catalysts, leading to higher activity and lower methane yield. Among them, Ni/Ce-C6 catalyst exhibited the best performance with high surface area and hydrogen yield, along with strong Ni-ceria interaction. Additionally, the CTAB assistance inhibited the formation of amorphous carbon.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Intan Clarissa Sophiana, Ferry Iskandar, Hary Devianto, Norikazu Nishiyama, Yogi Wibisono Budhi
Summary: Dry reforming of methane was studied using high-ratio zirconia in ceria-zirconia-mixed oxide-supported Ni catalysts. The effects of the catalyst support and Ni composition on the catalyst performance were investigated. The results showed that the 10%Ni/CeZrO2 catalyst exhibited the highest catalytic performance, with a high H-2/CO ratio indicating superior hydrogen production.
Article
Chemistry, Physical
Lucas G. Moura, Rafael P. Borges, Fabio B. Noronha, Carla E. Hori
Summary: The study investigated the catalytic activity and stability of nickel, platinum, rhodium, and ruthenium-based catalysts during hydrogen production from steam reforming of liquefied petroleum gas. It was found that rhodium and platinum catalysts exhibited higher catalytic activity and lower deactivation compared to nickel and ruthenium catalysts. Small increases in particle sizes of Ni(0) and Ru(0) during the process could contribute to the faster deactivation of Ru/CS and Ni/CS catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Do Ba Long, Bui Thanh Hau, Nguyen Thi Thuy Van, Nguyen Phung Anh, Thanh Gia-Thien Ho, Ha Cam Anh, Phan Hong Phuong, Cao Duc Huy, Nguyen Tri, Luu Cam Loc
Summary: Ce1-xLaxNiO3 catalysts with different La contents were prepared and investigated for methane bi-reforming. The effects of La content on catalytic activity were studied using various characterization techniques. The optimal substitution rate of La in Ce1-xLaxNiO3 was found to be x = 0.4, achieving high conversions of both CH4 and CO2.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Chemistry, Physical
Yu Zhang, Zhoujie Liang, Guojie Zhang, Jun Liu, Ying Wang, Yuqing Zhao, Guoqiang Li, Yongkang Lv
Summary: The Y-modified catalyst synthesized by modifying catalysts has shown excellent catalytic activity and anti-coking ability during dry methane reforming (DMR) process, with the potential to be an effective technology for mitigating the greenhouse effect.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yu Shi, Yiming Li, Shiwei Wang, Yuting Chu, Hongbo Yu, Tong Li, Hongfeng Yin
Summary: This study investigates the synergistic effect of metallic nickel and nickel phosphides in dry methane reforming reaction. The addition of phosphorus improves the dispersion of nickel species and enhances the resistance to carbon deposition. NiP-3/SiO2 catalyst exhibits the best activity, stability, and anti-coking properties.
Article
Chemistry, Physical
Qian Yang, Lihua Chen, Nannan Jin, Yanyan Zhu, Jiahui He, Peijie Zhao, Chuande Huang, Liping Wei, Xiaoxun Ma, Xiaodong Wang
Summary: The potential for carbon deposition over metallic Fe0 severely hampers the enhancement of methane-to-syngas selectivity through chemical looping technology. However, the in-situ formed CeFexAl1_xO3 over ceria-hexaaluminate was found to greatly improve carbon resistance even in the presence of Fe0. This CeFexAl1_xO3/Fe0/hexaaluminate sandwich-like structure provided a convenient pathway for CeFexAl1_xO3 as an oxygen pool to supply sufficient oxygen for timely oxidation of carbon over adjacent Fe0, resulting in outstanding carbon resistance and high CH4 conversion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Andrea Cardenas-Arenas, Esther Bailon-Garcia, Dolores Lozano-Castello, Patrick Da Costa, Agustin Bueno-Lopez
Summary: The study demonstrates that high surface area mixed oxide nanoparticles prepared using a reversed microemulsion method show good catalytic activity and carbon resistance in dry methane reforming. Compared to conventional catalysts, these nanoparticles reduce carbon accumulation during DRM tests.
JOURNAL OF RARE EARTHS
(2022)
Article
Multidisciplinary Sciences
Bo Yang, Jiang Deng, Hongrui Li, Tingting Yan, Jianping Zhang, Dengsong Zhang
Summary: The enhanced coking resistance of bound Ni in Ni/γ-Al2O3 catalysts for dry reforming of methane is attributed to its ability to facilitate CO desorption, suppress CO disproportionation, and reduce carbon deposition. Bound Ni exhibits higher activity due to its better methane cracking ability, stronger adsorption, and activation of CO2 by forming polydentate carbonate. The superior activation of CO2 by bound Ni also contributes to the gasification of formed coke.
Article
Chemistry, Physical
Yu Shi, Shiwei Wang, Yiming Li, Fan Yang, Hongbo Yu, Yuting Chu, Tong Li, Hongfeng Yin
Summary: By adjusting the ratio of metallic nickel to nickel phosphides, the properties of the catalyst were changed to investigate the synergistic effect of metallic nickel and nickel phosphides in dry methane reforming. It was found that the presence of phosphorus increased the dispersion of metallic nickel and its interaction with the alumina support, resulting in reduced carbon deposition.
Article
Chemistry, Physical
Ruifan Tan, Ping Wang, Luyao Guo, Zupeng Chen, Ronghe Lin, Xiaoling Mou, Yunjie Ding
Summary: The shape of the carriers plays a significant role in the catalytic performance of metal-supported catalysts. This study investigates the impact of different shapes of ZrO2 (nanorods-like, spherical, and irregular nanoparticles) on the catalytic performance in methane dry reforming by dispersing Ni species. Various characterization techniques are used to analyze the fresh and spent catalysts. The reducibility of NiO species is found to follow the order of Ni/RZ.
Article
Chemistry, Physical
Yaning Wang, Rongjun Zhang, Binhang Yan
Summary: In this study, Ni/Ce0.9Eu0.1O1.95 catalysts with better activity and enhanced stability were synthesized for dry reforming of methane. The catalysts exhibited stronger lattice oxygen mobility, higher oxygen storage capacity, and a strong metal-support interaction, which contributed to the reduction of carbon deposition and sintering. As a result, the catalyst achieved a balance between the rate of carbon generation and carbon consumption, leading to improved overall catalytic performance.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Boglarka Maroti, Gyorgy Safran, Giuseppe Pantaleo, Leonarda Francesca Liotta, Anna Maria Venezia, Valeria La Parola
Summary: The promotion effect of 0.3 wt% indium on different catalysts was studied and compared to the effects of ceria additive. NiIn/Al2O3 maintained activity in DRM, while NiIn/CeO2-Al2O3 reduced coke formation but also decreased catalytic activity.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Yaning Wang, Xiaohang Sun, Xiaohan Yu, Rongjun Zhang, Binhang Yan
Summary: The effects of A-site cation substitution and B-site active metal doping-segregation on the physicochemical properties and catalytic performance of Ni-doped perovskite-structured LnFe0.7Ni0.3O3 catalysts were investigated. The catalytic activity follows the order: NdFe0.7Ni0.3O3 > SmFe0.7Ni0.3O3 > EuFe0.7Ni0.3O3 > LaFe0.7Ni0.3O3. In-situ X-ray Diffraction (XRD) and X-ray Absorption Fine Structure (XAFS) measurements demonstrate the doping-segregation process of Ni, which enhances the dispersion of Ni and the interaction between metal and support. Oxygen vacancies generated by the exsolution of Ni play a crucial role in eliminating coke and shifting the product from surface carbon to gaseous CO, as observed from temperature-programmed surface reactions (TPSR) and pulse reactions. The excellent catalytic stability of NdFe0.7Ni0.3O3 without coke deposition or activity loss over 100 h is attributed to its strong resistance towards carbon deposition, as revealed by in-situ Raman experiments.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Engineering, Environmental
Jose L. Cerrillo, Natalia Morlanes, Shekhar R. Kulkarni, Natalia Realpe, Adrian Ramirez, Sai P. Katikaneni, Stephen N. Paglieri, Kunho Lee, Aadesh Harale, Bandar Solami, Aqil Jamal, S. Mani Sarathy, Pedro Castano, Jorge Gascon
Summary: The combination of catalytic decomposition of ammonia and in situ separation of hydrogen shows promise for producing clean energy. A combination of cobalt-based catalysts and a Pd-Au membrane has been found to efficiently produce high purity hydrogen. The membrane reactor offers operational advantages and energy-economic benefits compared to conventional reactors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Mohnnad H. Alabsi, Xilong Wang, Peng Zheng, Adrian Ramirez, Aijun Duan, Chunming Xu, Kuo-Wei Huang
Summary: In this study, different active metals (PdCu, PdZn, CuZn, CuGa, and CuNi) supported on novel dendritic Ce0.3Zr0.7O2 (CZ) were optimized to investigate their metal alloy interactions and utilize the unique surface properties of the spherical morphology and open pores. The best CO2 hydrogenation activity was observed with PdZn/CZ catalyst, which can be attributed to the CO2 adsorption capabilities of CZ support and hydrogen dissociation performance of the Pd-ZnO active site.
Article
Chemistry, Physical
Xilong Wang, Mohnnad H. Alabsi, Peng Zheng, Jinlin Mei, Adrian Ramirez, Aijun Duan, Chunming Xu, Kuo-Wei Huang
Summary: A dendritic PdCu/Ce0.3Zr0.7O2 catalyst with uniform spherical morphology was prepared and used for CO2 hydrogenation to methanol. The catalyst exhibited open dendritic pore channels and small particle sizes, which facilitated the diffusion process and increased the accessibility between active sites and reactants. The catalyst showed improved catalytic performance, with high CO2 conversion, methanol yield, PdCu-TOFMeOH, and long-term stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Alberto Rodriguez-Gomez, Samy Ould-Chikh, Javier Castells-Gil, Antonio Aguilar-Tapia, Pierre Bordet, Mogbel A. Alrushaid, Carlos Marti-Gastaldo, Jorge Gascon
Summary: We investigated the use of iron-based metal-organic frameworks as precursors for isobutane dehydrogenation catalysts and characterized the materials to determine their properties and active phases. The stabilization of Fe2+ species is crucial for achieving stable and selective catalysts, and the addition of potassium and titanium can improve the catalytic performance.
Article
Chemistry, Applied
Tomas Cordero-Lanzac, Adrian Ramirez, Alberto Navajas, Lieven Gevers, Sirio Brunialti, Luis M. Gandia, Andres T. Aguayo, S. Mani Sarathy, Jorge Gascon
Summary: This study provides a comprehensive analysis of the process of converting CO2 into green methanol, including kinetic analysis of catalysts, process simulation, techno-economic assessment, and life cycle evaluation. The results indicate that using renewable energy is crucial for CO2 abatement and profitable methanol production.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Mahmoud A. Abdulhamid, Rifan Hardian, Prashant M. Bhatt, Shuvo Jit Datta, Adrian Ramirez, Jorge Gascon, Mohamed Eddaoudi, Gyorgy Szekely
Summary: By introducing a kinked structure and crosslinking into the PBI backbone, the polymer properties were enhanced, significantly improving gas separation performance, with excellent performance in CO2 capture.
APPLIED MATERIALS TODAY
(2022)
Article
Multidisciplinary Sciences
Sheng Zhou, Osama Shekhah, Adrian Ramirez, Pengbo Lyu, Edy Abou-Hamad, Jiangtao Jia, Jiantang Li, Prashant M. Bhatt, Zhiyuan Huang, Hao Jiang, Tian Jin, Guillaume Maurin, Jorge Gascon, Mohamed Eddaoudi
Summary: A mixed-linker metal-organic framework (MOF) membrane, Zr-fum(67)-mes(33)-fcu-MOF, with a specific pore aperture shape, has been developed for efficient removal of nitrogen from natural gas while simultaneously removing carbon dioxide. Techno-economic analysis shows that this membrane has the potential to significantly reduce methane purification costs.
Article
Chemistry, Physical
Gontzal Lezcano, Shekhar R. Kulkarni, Vijay K. Velisoju, Valentina E. Musteata, Idoia Hita, Adrian Ramirez, Alla Dikhtiarenko, Jorge Gascon, Pedro Castano
Summary: This article investigates the effect of the support on the catalyst for the oxidative coupling of methane. The study shows that catalysts prepared using the spray-drying method exhibit promising selective catalytic performance. Additionally, the catalyst with the α+β SiC crystal phase demonstrates significantly higher activity compared to the β phase. The most promising catalyst is prepared using the spray-drying method and contains the α+β SiC crystal phase.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Hend Omar Mohamed, Rajesh K. Parsapur, Idoia Hita, Adrian Ramirez, Kuo-Wei Huang, Jorge Gascon, Pedro Castano
Summary: The nature and location of coke in zeolite catalysis have an interdependence with its true character in the mechanisms of ethylene oligomerization. Coke can improve the selectivity and yield of higher olefins and jet-fuel aliphatics, and this effect is better exploited in polymeric templated (hierarchical) ZSM-5 zeolite, which also exhibits good stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Chemical
Faisal Alahmadi, Anastasiya Bavykina, Daria Poloneeva, Adrian Ramirez, Robert Schucker, Jorge Gascon
Summary: Since its discovery in 1982, oxidative coupling of methane (OCM) has been considered a promising method for synthesizing ethylene. In this study, undoped neodymium oxide and neodymium oxide doped with different levels of strontium were tested under various operating conditions. The results showed that the catalysts achieved C2+ yields greater than 18%, with the space velocity impacting C2+ selectivity. The difference in activity between the catalysts was attributed to the contribution of different oxygen centers.
Article
Chemistry, Multidisciplinary
Tomas Cordero-Lanzac, Adrian Ramirez, Marta Cruz-Fernandez, Hans-Jorg Zander, Finn Joensen, Steven Woolass, Andreas Meiswinkel, Peter Styring, Jorge Gascon, Unni Olsbye
Summary: A study on the conversion of CO2 to propane through catalytic reactions was conducted, and a corresponding reactor was designed. The use of an advanced catalyst combination achieved good catalytic performance under optimal conditions. Life Cycle Assessment suggested that the use of green hydrogen can significantly reduce the global warming impact of propane production.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Kun Liu, Adrian Ramirez, Xin Zhang, Mustafa Caglayan, Xuan Gong, Jorge Gascon, Abhishek Dutta Chowdhury
Summary: The CO2-to-aromatics process converts carbon dioxide (CO2) into valuable petrochemicals, specifically aromatics like benzene, toluene, and xylene, using metal/zeolite bifunctional catalytic systems. These aromatics are currently derived exclusively from fossil fuels and are used in various industrial applications. This process can help mitigate climate change by reducing greenhouse gas emissions and promoting a more sustainable and circular economy by reducing reliance on fossil fuels.
Article
Energy & Fuels
Francisco Platero, Alfonso Caballero, Gerardo Colon
Summary: Cobalt supported TiO2 catalysts were prepared by wet-impregnation and by immobilization over APTES grafted TiO2. The impregnated system showed better catalytic performance after reduction at 260 degrees C, but significant deactivation was observed. In contrast, the functionalized catalyst showed better catalytic performance after reduction at 400 degrees C with notable stability. CO-DRIFT operando analysis revealed that the impregnated system was strongly affected by negative SMSI upon reduction at higher temperature, while immobilization on APTES hindered the loss of metal active sites. The study of spent catalysts indicated that Co was redispersed in the impregnated catalyst while functionalized catalyst tended to form agglomerates.
Article
Nanoscience & Nanotechnology
Alberto Rodriguez-Gomez, Samy Ould-Chikh, Wilson Henao, Giovanni Agostini, Gonzalo Prieto, Jorge Gascon
Summary: A series of Pt-Fe catalysts supported on mesoporous silica SBA-15 were prepared and studied, showing high activity and selectivity. However, detrimental structural changes occurred after reaction-regeneration cycles, which could be minimized by reactivation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Teng Li, Sang-Ho Chung, Stefan Nastase, Adrian Galilea, Yan Wang, Ildar Mukhambetov, Moussa Zaarour, Juan Carlos Navarro de Miguel, Jurjen Cazemier, Abhay Dokania, Liliana Panarone, Jorge Gascon, Luigi Cavallo, Javier Ruiz-Martinez
Summary: In this study, two H-ZSM-5 zeolites with different aluminum distributions were compared, and it was found that aluminum enrichment closer to the surface leads to more paired acid sites and enhanced catalytic activity. Furthermore, this aluminum distribution accelerates cascade reactions to produce aromatics and improves their diffusion out of the zeolite. By exploiting this feature, hollow zeolites were successfully fabricated, combining optimized active sites and improved diffusion and confinement properties to achieve the highest capacity for aromatic production.
