Article
Chemistry, Applied
Shuxiao Wang, Jing Gu, Rui Shan, Haoran Yuan, Chen Yong
Summary: This study investigates an effective method for catalytic reforming of toluene using peat char-supported Ni metal to achieve clean gas production. The results suggest that the SiO2 structure plays a significant role in the catalytic process, resulting in high catalytic performance.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Zhonghui Zhang, Changlei Qin, Zhiliang Ou, Hongqiang Xia, Jingyu Ran, Chunfei Wu
Summary: The study investigated the sorption enhanced steam reforming (SESR) of toluene using a Ni/perovskite catalyst and CaO sorbent, achieving high hydrogen purity at an appropriate temperature. Regeneration and characterization of the catalyst showed stable performance and compatibility in the SESR process for high-purity hydrogen production.
Article
Engineering, Chemical
Xianhua Wang, Chun Wang, Yue Liu, Xiong Zhang, Haiping Yang, Yingquan Chen, Hanping Chen
Summary: A micro-mesoporous Ni/ZSM-5 (ST) catalyst prepared with starch template showed high activity for catalytic cracking of toluene. Three metal promoters, Fe, Co, and Ce, were used to prepare nickel-based bimetallic catalysts to improve the stability of the Ni/ZSM-5 (ST) catalyst. Among them, Ni-Co/ZSM-5 (ST) catalyst exhibited the best performance with excellent anti-carbon deposition characteristics.
Article
Chemistry, Physical
Nanqi Li, Nan-qi Duan, Bo Liu, Qihao Li, Lichao Jia, Dong Yan, Jian Li
Summary: A Ni/CeO2-LCeCrN catalyst has been developed for steam reforming methanol, ethanol, and glycerol with excellent catalytic performance and durability in reducing carbon deposition, suitable for producing reformate gas for solid oxide fuel cell power generation.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Applied
Asiele Hernandez Martinez, Eduardo Lopez, Luis E. Cadus, Fabiola N. Aguero
Summary: The study found that partially replacing La with Ca and Ce in Rh/perovskite catalysts can improve the specific surface area of the support and activate oxygen mobility, leading to enhanced catalytic performance. However, for Rh/LaCeAlO3 0.3% catalyst, although it showed low carbon accumulation and longer reaction time, deactivation occurred after 14 hours.
Article
Chemistry, Physical
HuaLun Zhu, Ziyin Chen, Laura Pastor-Perez, Xiangyi Long, Marcos Millan
Summary: Tar removal by catalytic steam reforming is important in gasification hot gas treatment. The effect of a full syngas mixture on this reaction has not been comprehensively investigated. This study analyzes the effect of each component and their combinations on steam reforming of toluene as a biomass gasification tar model. The presence of H2 and CH4 promotes catalyst deactivation, while CO and CO2 have minor inhibitory effects.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Tingting Zhu, Ping Ning
Summary: This paper systematically investigates the adsorption behavior of H2O and toluene on different supports, revealing that MgAl2O4 may be the perfect support material for toluene steam reforming, and Ni-MgAl2O4 can exhibit perfect catalytic activity and stability in the reaction.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Leo Brody, Mahe Rukh, Runxia Cai, Azin Saberi Bosari, Reinhard Schomaecker, Fanxing Li
Summary: Sorption-enhanced steam reforming (SESR) of toluene using A- and B-site doped Sr(1-x)A'(x)Fe1-yB'(y)O3-delta perovskites in a chemical looping scheme shows promise in converting aromatic tar byproducts into hydrogen-rich syngas. Impregnating Ni on the perovskite surface improves toluene conversion, and a dual bed configuration enhances cyclic CO2 capture and release for H2-rich product syngas.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Chemistry, Physical
S. Sayas, N. Vivo, J. F. Da Costa-Serra, A. Chica
Summary: The study demonstrates that nickel catalyst supported on sepiolite exhibits promising catalytic performance in steam reforming of toluene, especially when prepared using precipitation method. This alternative method results in a catalyst with higher activity, selectivity to hydrogen, and lower production of undesirable by-products compared to the traditional incipient wetness impregnation method.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Wei Pan, Junguang Meng, Tingting Gu, Qian Zhang, Jubing Zhang, Xinye Wang, Changsheng Bu, Changqi Liu, Hao Xie, Guilin Piao
Summary: Non-thermal plasma (NTP) coupled Ni-based catalysts show promise in converting biomass tar to syngas. Catalysts supported on hydroxyapatite (Ni-HAP) and gamma Al2O3 (Ni-gamma Al2O3) were combined with a coaxial dielectric barrier discharge (DBD) plasma to degrade tar, with benzene as a model compound. The reaction temperature is crucial for catalysis, with the catalyst enhancing benzene conversion and total gas yield. Steam in the system has both positive and negative effects, promoting decomposition but inhibiting conversion when excessive. The Ni3-HAP catalyst exhibits the highest benzene conversion and energy efficiency due to its flexible ion exchange properties. Carbon deposition is the main cause of catalyst activity degradation. Balancing tar conversion, decomposition, steam content, and its decomposition rate is critical for efficient operation.
Article
Chemistry, Applied
Siqian Zhang, Wanpeng Hu, Xiaan Xiang, Haiyang Xu, Zhangfeng Shen, Yanan Liu, Qineng Xia, Zhigang Ge, Yangang Wang, Xi Li
Summary: In this study, efficient catalytic steam reforming of biomass tar was achieved using a Ni-Fe-Ce hydrotalcite-derived structured reactor, demonstrating superior catalytic performance and stability. The presence of Ce, the distorted channels of monolithic wood, and the graphitic carbon layer played key roles in improving catalyst dispersion and preventing coke formation. This work suggests that the Ni-Fe-Ce hydrotalcite-derived structured reactor is potentially cost-effective for various high-temperature applications.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Pawel Mierczynski, Magdalena Mosinska, Natalia Stepinska, Karolina Chalupka, Magdalena Nowosielska, Waldemar Maniukiewicz, Jacek Rogowski, Nirmal Goswami, Krasimir Vasilev, Malgorzata Szynkowska
Summary: This study investigated the catalytic properties of Ni catalysts supported on different oxide surfaces in the oxy-steam reforming process of methane. The Ni/CeO2·La2O3 (2:1) catalyst exhibited superior activity and selectivity towards hydrogen formation, attributed to the high content of Ni species on the catalyst surface. However, the low activity of Ni catalysts supported on La2O3 or oxide with high lanthanum content is due to the strong interaction of NiO with the support.
Article
Energy & Fuels
Dan Zhou, Zhiyuan Li, Yaoqi Deng, Chengxiong Dang, Weiquan Cai
Summary: Sorption-enhanced biogas steam reforming with a Pb-modified Ni-CaO catalyst shows excellent stability and can continuously produce high-purity hydrogen.
Article
Energy & Fuels
Omeralfaroug Khalifa, Mingxin Xu, Rongjun Zhang, Tahir Iqbal, Mingfeng Li, Qiang Lu
Summary: Catalytic steam reforming is a promising method for tar conversion to syngas during biomass gasification, but catalyst deactivation remains a challenge. A modified Ni-Co/Al2O3-CaO catalyst showed superior performance in toluene catalytic dissociation compared to a conventional Ni/Al2O3 catalyst. The presence of Ni-Co alloy and CaO doping enhanced the catalytic performance.
FRONTIERS IN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Mahmood Andache, Mehran Rezaei, Zohre Taherkhani
Summary: This article synthesized nanocrystalline gamma-alumina with high surface area and mesoporous structure as a carrier for Ni catalysts, which showed improved efficiency and stability in steam reforming of methane. The incorporation of MgO in nickel catalyst further enhanced the resistance to carbon deposition and catalytic activity, resulting in high stability of the promoted catalyst.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Applied
Evgeny A. Uslamin, Hikaru Saito, Yasushi Sekine, Emiel J. M. Hensen, Nikolay Kosinov
Summary: The modification of ZSM-5 zeolite with Ga and Mo enhances the aromatization of ethane, resulting in the formation of benzene-toluene-xylene mixtures. However, both catalysts suffer from coke formation, leading to rapid deactivation.
Article
Chemistry, Physical
Kota Murakami, Yuta Mizutani, Hiroshi Sampei, Atsushi Ishikawa, Yasushi Sekine
Summary: The study investigates the correlation between metal-oxide interactions and the properties of supported metal on CeO2, revealing that CO adsorption on Me-1 is strongly dependent on the binding energies of Me-1, which are influenced by charge transfer and metal oxophilicity. The results suggest that activities of Me-1 can be predicted based on the strength of anchoring by oxide supports, with smaller ionic radii of doped heterocations leading to more tightly bound Me-1.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Yukiko Hosono, Hikaru Saito, Takuma Higo, Kosuke Watanabe, Kazuharu Ito, Hideaki Tsuneki, Shun Maeda, Kunihide Hashimoto, Yasushi Sekine
Summary: The study demonstrates that Ce0.8Co0.2O2 catalyst doped with transition metal shows high activity and selectivity for ethylene production in the presence of steam, operating through the Mars-van Krevelen mechanism. The Co-CeO2 interactions play a crucial role in controlling the characteristics of the reactive lattice oxygen suitable for EDH.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Masahiko Matsukata, Yasushi Sekine, Eiichi Kikuchi, Motomu Sakai, Bharathi Subramanian, Makoto Toyoda, Taisuke Furuhata
Summary: Y-type zeolite membranes were prepared on a porous tubular a-alumina support by a secondary growth process. The experimental results showed that seed size, pH of seed solution, and degassing of support played significant roles in membrane deposition process. Optimization of these parameters resulted in crack-free compact membranes that effectively separated a mixture of isopropyl alcohol and water in a vapor-phase separation process.
Article
Chemistry, Multidisciplinary
Hiroshi Sampei, Koki Saegusa, Kenshin Chishima, Takuma Higo, Shu Tanaka, Yoshihiro Yayama, Makoto Nakamura, Koichi Kimura, Yasushi Sekine
Summary: Quantum annealing is used to predict molecular adsorption on solid surfaces. The evaluation of adsorption is crucial for various fields, but it is challenging to predict the stable coordination for multi-molecular adsorption. This report presents a novel method that uses the quantum annealing principle to quickly search for adsorption coordination, providing faster search speed and more stable molecular arrangement findings than conventional methods.
Article
Chemistry, Multidisciplinary
Keke Kang, Sota Kakihara, Takuma Higo, Hiroshi Sampei, Koki Saegusa, Yasushi Sekine
Summary: In this study, it was found that the reverse water gas shift (RWGS) reaction can be carried out at low temperatures without equilibrium constraints using chemical looping (CL) method. With the newly developed MGa2Ox materials, almost 100% CO2 conversion was achieved at temperatures as low as 673 K, greatly reducing the cost for CO2 separation. This finding is a significant advancement for the future utilization of CO2.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yasushi Sekine
Summary: Low-temperature ammonia synthesis using a solid heterogeneous catalyst under the influence of an electric field was studied. The reaction efficiency was improved by the associative mechanism facilitated by proton-conducting species on the catalyst support surface, leading to the formation of N2Had intermediates. Various analysis techniques were employed to investigate the role of metal and catalyst support structure, and computational chemistry was used for further analysis. The study showed that the catalytic activity shifted from N-2 dissociation to N2H formation, resulting in efficient ammonia synthesis at low temperatures even with base metal catalysts like Fe and Ni.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Multidisciplinary
Ayaka Motomura, Yuki Nakaya, Clarence Sampson, Takuma Higo, Maki Torimoto, Hideaki Tsuneki, Shinya Furukawa, Yasushi Sekine
Summary: Dry reforming of methane (DRM) is a promising reaction for converting greenhouse gases into syngas. By applying an electric field and using Ni-Fe bimetallic catalysts, the difficulties in conventional thermal catalytic reactions can be overcome.
Article
Chemistry, Multidisciplinary
Taku Matsuda, Ryo Ishibashi, Yoshiki Koshizuka, Hideaki Tsuneki, Yasushi Sekine
Summary: This study provides a quantitative analysis of oxide surface protonics in a dry H-2 atmosphere. The results show that the conductivity of porous CeO2 increases significantly when H-2 is supplied, with dissociative adsorption of H-2 playing a key role in conduction.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Kaho Nagakawa, Hiroshi Sampei, Ayako Takahashi, Jun Sasaki, Takuma Higo, Naoya Mori, Hideto Sato, Yasushi Sekine
Summary: The effect of OH-groups on the surface of a Ni catalyst for low-temperature steam reforming of methane in an electric field was investigated. It was found that adding hydrogen and steam in the pre-treatment, as well as the presence of an electric field, can enhance the catalyst activity by increasing the surface OH-groups and Ni(OH)2 content, thereby improving the surface proton conduction.
Article
Chemistry, Multidisciplinary
Kosuke Watanabe, Takuma Higo, Hideaki Tsuneki, Shun Maeda, Kunihide Hashimoto, Yasushi Sekine
Summary: This study found that the perovskite oxide YCrO3 exhibits higher catalytic activity and C2H4 selectivity in the presence of steam, which is significant for improving the efficient production of ethylene. Steam plays an important role in stabilizing the catalyst's high activity and inhibiting coke accumulation.
Article
Chemistry, Multidisciplinary
Naoya Nakano, Maki Torimoto, Hiroshi Sampei, Reiji Yamashita, Ryota Yamano, Koki Saegusa, Ayaka Motomura, Kaho Nagakawa, Hideaki Tsuneki, Shuhei Ogo, Yasushi Sekine
Summary: This study investigates the effect of an electric field on the dry reforming of methane. The results show that the application of an electric field significantly enhances the conversion rate of methane and carbon dioxide, and promotes the reaction between surface oxygen and methane at the Pt and CeO2 interface.
Article
Chemistry, Multidisciplinary
Jun-Ichiro Makiura, Sota Kakihara, Takuma Higo, Naoki Ito, Yuichiro Hirano, Yasushi Sekine
Summary: The conversion of CO2 to CO by reverse water-gas shift using chemical looping is an efficient process for CO production, and Co-In2O3 has been developed as a suitable oxygen storage material for this process, showing high CO2 splitting rate and durability.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Maki Torimoto, Yasushi Sekine
Summary: This article provides an overview of recent research on alloy catalysts, which have excellent catalytic performance in methane reforming reactions. Alloy catalysts can improve activity, stability, and resistance to carbon deposition, making them highly promising for various applications.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ayaka Shigemoto, Takuma Higo, Yuki Narita, Seiji Yamazoe, Toru Uenishi, Yasushi Sekine
Summary: With the increasing use of electrically driven automobiles and the combination of engines and motors, the exhaust temperatures of internal combustion engines are decreasing. Therefore, there is a need for improved performance of exhaust gas purification catalysts. This study found that applying a direct current electric field to a Pd-supported catalyst showed high purification rates even at low temperatures.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
