Article
Chemistry, Multidisciplinary
Luning Chen, Zhiyuan Qi, Xinxing Peng, Jeng-Lung Chen, Chih-Wen Pao, Xibo Zhang, Chaochao Dun, Melissa Young, David Prendergast, Jeffrey J. Urban, Jinghua Guo, Gabor A. Somorjai, Ji Su
Summary: This study demonstrates how the synergy between noble metal single sites and oxygen vacancies enhances hydrogen generation efficiency and CO2 selectivity in methanol steam reforming reactions. It lays the foundation for the rational design of single site catalysts at the atomic scale and the development of highly efficient and selective hydrogen evolution systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Energy & Fuels
Xinqi Yao, Shuaishuai Yuan, Chuandong Li, Lei Wang, Xinhai Yu, Pengfei Tian, Shan-tung Tu
Summary: Methanol steam reforming (MSR) is an efficient method for hydrogen production in fuel cell applications, and Pd-Zn catalysts are commonly used. To minimize Pd loading, PdZn nanoparticles (NPs) and Pd1/ZnO single-atom catalysts (SACs) were prepared through ball milling. The 2PdZn/Al2O3 NP catalyst exhibited excellent antioxidation ability and stability at 350 degrees C, with methanol conversion maintained at 99.5% and CO concentration below 0.71%. It showed promising potential for on-board hydrogen production for fuel cell vehicles.
Article
Chemistry, Physical
Catia Azenha, Tiago Lagarteira, Cecilia Mateos-Pedrero, Adelio Mendes
Summary: This study investigates the application of bimetallic catalysts in methanol steam reforming. By impregnating copper and Pd in different sequences, the surface composition of the catalyst was successfully tuned, resulting in improved methanol conversion and reforming selectivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Masoumeh Khanchi, Seyed Mohammad Ali Mousavian, Saeed Soltanali
Summary: The experimental results show that SiO2-Al2O3-based catalysts perform better than SiO2 and Al2O3-based catalysts, with the best performance observed at lower Si/Al ratios.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Magdalena Greluk, Wojciech Gac, Marek Rotko, Grzegorz Slowik, Sylwia Turczyniak-Surdacka
Summary: The addition of citric acid improved the dispersion and reduced particle size of metal particles, while catalysts prepared from ammonia solution showed the largest metal particle size. In steam reforming of ethanol, dehydrogenation of ethanol takes place preferentially on terrace sites, while cleavage of C-C bond is favored by edge/steps sites.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Xianglei Liu, Chuang Bao, Zhonghui Zhu, Hangbin Zheng, Chao Song, Qiao Xu
Summary: Mesoporous Cu/TiO2-CeO2 catalysts show excellent performance in methanol steam reforming, achieving enhanced hydrogen production rate through thermophoto synergic effects, paving the way for corresponding technology development.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Andrea Braga, Marina Armengol-Profitos, Laia Pascua-Sole, Xavier Vendrell, Lluis Soler, Isabel Serrano, Ignacio J. Villar-Garcia, Virginia Perez-Dieste, Nuria J. Divins, Jordi Llorca
Summary: The catalytic performance and mechanism of Ni-Fe nanocatalysts supported on CeO2 for methane steam reforming were investigated. It was found that the dry ball milling method resulted in a higher amount of defective carbon on the surface of the catalysts, which improved their coke resistance.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Ceramics
Chenxu Guo, Hanning Xiao, Wenming Guo, Tingting Bao, Jiawei Xie, Hang Qin, Pengzhao Gao
Summary: CuO-ZnO-CeO2 catalysts were prepared on Al2O3/cordierite monolith through sol-gel combustion method, and the effects of combustion temperature on the properties and performance of the catalysts were investigated. The catalyst (CZC-400) prepared at 400 degrees C showed uniform distribution on the monolith with smaller particle size (4.2 nm) and higher surface area (23.7 m(2) g(-1)). In methanol steam reforming, CZC-400 exhibited 100% methanol conversion at 260 degrees C without by-product CO, and maintained excellent catalytic activity and stability for 32 hours.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Shiqing Jin, Didi Li, Zhen Wang, Yiming Wang, Li Sun, Minghui Zhu
Summary: Cu/CeO2 catalysts prepared by a deposition-precipitation method with various loadings were investigated using in situ characterization techniques. The catalyst surface contains metallic Cu-0 and interfacial sites, with the latter being the key active sites for the methanol steam reforming reaction. Furthermore, the structures of both sites change dynamically in response to different environmental conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Chenxu Guo, Miao Li, Wenming Guo, Hang Qin, Moyu Liao, Pengzhao Gao, Li Ni, Yang Zhou, Hanning Xiao
Summary: In this study, a porous CeO2-based nanosheet array was grown on the surface of cordierite honeycomb ceramic via hydrothermal approach. This structured catalyst, decorated with CuO-ZnO catalysts, exhibited excellent catalytic activity and durability, making it a potential choice for hydrogen production in autonomous vehicles.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Opeoluwa O. Fasanya, Abdulazeez Y. Atta, Myo T. Z. Myint, Joydeep Dutta, Baba Y. Jibril
Summary: CuZn-based catalysts synthesized by different methods showed diverse physico-chemical properties. Catalysts prepared by one pot hydrothermal synthesis and coimpregnation exhibited the highest methanol conversion and H2 selectivity, indicating that catalytic activity is largely affected by the nature of Cu species within the catalyst matrix.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
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
Energy & Fuels
Ting Wang, Sibao Liu, Li Wang, Guozhu Liu
Summary: Catalytic steam reforming of toluene was investigated using Rh/CeO2 catalysts prepared by different methods. The Rh/CeO2(LDP-1) catalyst prepared by L-lysine assisted deposition precipitation method exhibited excellent catalytic activity, stability, and resistance to carbon deposition. The superior performance was attributed to the enhanced Rh dispersion, surface Rh0 content, and concentration of surface oxygen vacancy. A dual-site functional catalyst mechanism involving the -CHO group as a key intermediate for gas products generation was proposed. This study highlights the advantages of L-lysine-assisted deposition precipitation method for preparing highly active and stable metal-based catalysts for steam reforming reactions.
Article
Chemistry, Physical
M. R. Kosinski, A. J. Vizcaino, L. M. Gomez-Sainero, A. Carrero, R. T. Baker
Summary: Catalysts of 2 wt% Pd/Sm-doped Ceria were prepared and evaluated for hydrogen production by methanol reforming. Among the three preparation methods, Method B resulted in the best activity and CO2 selectivity due to the superior nanostructure of the catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
C. Scarfiello, M. Bellusci, L. Pilloni, D. Pietrogiacomi, A. La Barbera, F. Varsano
Summary: Ni60Co40 nanoparticles supported on gamma-Al2O3 are capable of catalysing the steam reforming of methane and providing the necessary heat by induction heating. The temperature reached on the catalyst surface is influenced by metal loading and particle size distribution, affecting the ability of ferromagnetic nanoparticles to convert the radio frequency field into heat effectively. The catalyst pellets demonstrated effectiveness in achieving high temperatures and methane conversion rates during the steam methane reforming reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Environmental Sciences
Ismael F. Mena, Elena Diaz, Juan J. Rodriguez, Angel F. Mohedano
Summary: Ionic liquids have exceptional properties but can cause environmental harm due to their high solubility in water. Cost-effective solutions are needed to deal with these pollutants, with advanced oxidation processes being an effective technology to remove them.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Daniel Martinez del Monte, Arturo J. Vizcaino, Javier Dufour, Carmen Martos
Summary: The combination of zeolites with Fischer-Tropsch catalysts increases the selectivity towards specific hydrocarbon ranges, allowing for the development of a tunable process for synthesis gas conversion.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
D. Sanz-Villanueva, D. Alique, A. J. Vizcaino, J. A. Calles, R. Sanz
Summary: This study investigates the use of TiO2-based particles as an intermediate layer for the fabrication of fully dense Pd membranes by Electroless Pore Plating. The results show that doping the ceramic particles with Pd nuclei prior to incorporation onto the porous support can reduce the Pd thickness and improve mechanical stability. However, some palladium penetration is observed in the porous structure, which affects the H-2 permeance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
A. Gomez-Aviles, M. Penas-Garzon, C. Belver, J. J. Rodriguez, J. Bedia
Summary: Activated carbons were prepared by chemical activation of lignin with FeCl3 using microwave heating, resulting in a microporous carbon with high surface area and acidic properties. The adsorption of acetaminophen reached about 300 mg.g(-1) at 60 degrees C, with an endothermic process and increased randomness observed. The kinetics was described by pseudo-second order model and breakthrough curves fitted well to various adsorption models, showing potential for application in water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Raul Gimenez-Aguirre, Javier Dufour, Jose A. Calles, Javier Marugan
Summary: This paper investigates a measurement technique to determine the asphaltene aggregation onset, kinetics, and size-related parameters, and explores the action of several commercial additives as inhibitors.
Article
Engineering, Chemical
I Sanchis, E. Diaz, A. H. Pizarro, J. J. Rodriguez, A. F. Mohedano
Summary: Nitrate pollution of water bodies is a serious global environmental problem, and there is a lack of cost-effective solutions for its removal. Catalytic reduction is an emerging technology that can transform nitrate into harmless nitrogen gas, but it faces challenges in stability and catalyst regeneration.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Reinaldo Juan Lee Pereira, Wenting Hu, Ian S. Metcalfe
Summary: Novel ammonia catalysts can achieve high reaction rates under milder conditions, leading to lower costs and energy requirements. The sensitivity of the energy and economic performance of a chemical looping process was evaluated based on gas-solid reaction thermodynamics, and it was found that thermodynamic parameters greatly influenced the system's performance.
Article
Chemistry, Physical
Ines Sanchis, Juan Jose Rodriguez, Angel F. Mohedano, Elena Diaz
Summary: This work investigates the impact of metal loading, impregnation order, and promoter metal type on a Pd bimetallic catalyst supported on gamma-alumina for the catalytic reduction of nitrate. The findings suggest that Pd-Sn catalysts exhibit higher activity and NH4+ selectivity, while their stability decreases in the presence of other ions.
Article
Engineering, Environmental
Y. L. Wang, M. Penas-Garzon, J. J. Rodriguez, J. Bedia, C. Belver
Summary: Novel Sr@TiO2/UiO-66-NH2 heterostructures were synthesized and used as photocatalysts for the degradation of acetaminophen. The heterostructures showed higher activity and stability compared to UiO-66-NH2, and exhibited excellent performance in a continuous flow reaction system.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Environmental Sciences
M. Pariente, Y. Segura, S. Alvarez-Torrellas, J. A. Casas, Z. M. de Pedro, E. Diaz, J. Garcia, M. J. Lopez-Munoz, J. Marugan, A. F. Mohedano, R. Molina, M. Munoz, C. Pablos, J. A. Perdigon-Melon, A. L. Petre, J. J. Rodriguez, M. Tobajas, F. Martinez
Summary: This review assesses different technologies for the on-site treatment of hospital wastewater from 2014 to 2020, focusing on the removal of pharmaceutical compounds. Antibiotics and psychiatric drugs were the main PhCs detected, with MBR and ozonation technologies showing promising results, but requiring further optimization for full-scale implementation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Physical
Pedro J. Megia, Anabel Morales, Arturo J. Vizcaino, Jose A. Calles, Alicia Carrero
Summary: By adjusting the O-2/AcOH molar ratio in the Ni/CeO2 catalyst, higher acetic acid conversion and hydrogen yield can be achieved with reduced coke deposition. The mesostructured Ni/CeO2 catalyst exhibits the best catalytic performance and the lowest coke formation.
Article
Engineering, Chemical
Alessio Caravella, David Martinez-Diaz, Giuseppe Prenesti, Valeria Michienzi, Jose Antonio Calles, Rail Sanz, David Alique
Summary: This paper elucidates the role of flux direction in composite supported metal membranes for hydrogen purification under pure-hydrogen and mixture conditions. It provides a mathematical proof that in pure-hydrogen conditions, the flux measured when hydrogen is fed from the support to the metal layer is always higher than the flux measured in the opposite direction. It also introduces the concept of swap point in mixture conditions, which represents the composition at which the fluxes in the two directions are equal.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Rafael R. Solis, Manuel Penas-Garzon, Carolina Belver, Juan J. Rodriguez, Jorge Bedia
Summary: This work introduces the novel use of a highly stable UiO-66-NH2 MOF in water, demonstrating its excellent catalytic performance and removal efficiency for sulfamethoxazole. The synthesis method and Zr precursor have significant effects on the properties of the MOF.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
