Article
Engineering, Chemical
Vinayak N. Kalekar, Prakash D. Vaidya
Summary: This study investigates hydrogen production through catalytic aqueous-phase reforming of model compounds of microalgae and activated sludge using Pt/Al2O3 and Pt/Al2O3-CeO2 catalysts in a batch reactor. The results show high H2 yields and gas phase conversions for glycerol, glucose, and alanine, while humic acid exhibits a low tendency to H2 production. These findings aim to enhance the technology for sustainable advanced biofuels production from aqueous biomass streams.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
A. S. Oliveira, T. Cordero-Lanzac, J. A. Baeza, L. Calvo, J. J. Rodriguez, M. A. Gilarranz
Summary: This study investigated the catalytic performance and deactivation in aqueous phase reforming of brewery wastewater for hydrogen production. Different catalysts were tested, with PtRe catalysts showing higher activity and Pt catalysts supported on modified activated carbon exhibiting higher hydrogen production. Despite the initial promising results, significant deactivation was observed, likely caused by the adsorption of organic species and coke-like matter deposition on the catalysts' surface.
Article
Chemistry, Applied
A. J. Reynoso, U. Iriarte-Velasco, M. A. Gutierrez-Ortiz, J. L. Ayastuy
Summary: The addition of Pt to cobalt aluminate resulted in a synergistic effect that promoted the reduction of both Pt and Co species, as well as cobalt dispersion, increasing the amount of exposed metallic sites. Bimetallic catalysts showed excellent stability and activity in glycerol APR and WGS, but had lower selectivity to hydrogen.
Article
Chemistry, Physical
Wen Cheng, Yishuang Wang, Mingqiang Chen, Defang Liang, Chang Li, Zhonglian Yang, Jun Wang
Summary: In this study, nickel-based catalysts supported on modified attapulgite (ATP) were prepared and applied to the aqueous phase reforming of glycerol (APRG). The results showed that the acid/base treatment of ATP significantly improved the catalytic performance, resulting in higher glycerol conversion and hydrogen selectivity. The bimetallic NiFe/MA-E catalyst exhibited the best performance at low temperature. Catalyst deactivation was mainly caused by particle agglomeration and carbon deposition.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Agricultural Engineering
Atte Aho, Matias Alvear, Juha Ahola, Jani Kangas, Juha Tanskanen, Irina Simakova, Jose Luis Santos, Kari Eranen, Tapio Salmi, Dmitry Yu Murzin, Henrik Grenman
Summary: The study focused on using organic acids from biorefineries to reform pine and birch hydrolysate from waste wood, demonstrating that direct processing of the hydrolysates is feasible for close to full conversion. The best results were achieved with a tailored bimetallic Pd-Pt/sibunit catalyst in a temperature range of 175°C-225°C.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
A. J. Reynoso, J. L. Ayastuy, U. Iriarte-Velasco, M. A. Gutierrez-Ortiz
Summary: This study investigated the influence of process variables on the catalytic performance in the glycerol hydrogenation reaction, finding that higher reaction temperature/pressure, lower space velocity, and more diluted feedstocks favored H2 production. Additionally, a threshold value for the ratio of dehydrogenation to dehydration liquid products was identified at 10% glycerol concentration. Characterization of the post-reaction catalyst revealed that Co leaching was the major drawback.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Rungsima Yeetsorn, Sabaithip Tungkamani, Yaowaret Maiket
Summary: This study investigates the manufacture of ceramic foam catalyst supports using a polymeric sponge replica process and polymer foams as a template. The cell architectures of polyurethane and polyvinyl alcohol foams are suitable for catalyst support preparation. The rheology of catalyst solution, polymer decomposition rate, and sintering rate greatly affect the characteristics of ceramic foam catalysts.
Article
Chemistry, Physical
A. S. Oliveira, A. Aho, J. A. Baeza, L. Calvo, I. L. Simakova, M. A. Gilarranz, D. Yu Murzin
Summary: Coupled hydrogenation and aqueous-phase reforming were studied for enhanced H-2 production from brewery wastewater, converting maltose to maltitol. Faster catalyst deactivation was observed in the APR of maltose than maltitol, leading to higher H-2 selectivity and yield in the latter. Increasing temperature changed reaction pathways, favoring C1-C2 alkane production, with higher liquid-phase product selectivity in maltose APR.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
A. Morales-Marin, J. L. Ayastuy, U. Iriarte-Velasco, M. A. Gutierrez-Ortiz
Summary: The study found that spinel-derived catalysts were more suitable than alumina supported nickel catalysts for biohydrogen production by Aqueous-Phase Reforming of glycerol, with Mg and Ce doping playing a positive role in increasing nickel dispersion and basicity. Furthermore, Mg doping helped hinder nickel reduction, and both promoters improved the stability of the catalyst's textural properties under APR conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Chemistry, Physical
Giuseppe Pipitone, Giulia Zoppi, Raffaele Pirone, Samir Bensaid
Summary: Aqueous phase reforming (APR) is a catalytic reaction that produces hydrogen from oxygenated compounds. Properly designing the catalyst, including preparation method, choice of active metal, support type, and other factors, plays a key role in achieving high conversion, selectivity, and stability. Both theoretical and experimental studies, including in-situ techniques, have been conducted to understand the catalytic phenomena involved in the reaction and to present the most up-to-date developments in the field.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Jessica Justicia, Jose Alberto Baeza, Adriana S. de Oliveira, Luisa Calvo, Francisco Heras, Miguel A. Gilarranz
Summary: Aqueous-phase reforming (APR) of model compounds from bio-oil aqueous fraction (AFB) was studied, and the effects of different operating conditions on substrate conversion, carbon-to-gas yield (CCgas), and hydrogen and alkanes production were evaluated. The results showed that APR is a feasible option for the valorization of AFB, with high hydrogen production and stable catalyst performance.
Article
Nanoscience & Nanotechnology
Jiao Yu, Xinke Li, Qingyao Wu, Hui Wang, Yang Liu, Hui Huang, Yunliang Liu, Mingwang Shao, Jian Fan, Haitao Li, Zhenhui Kang
Summary: This study investigated the H2 production performance of metal-free catalyst N-doped carbon dots/g-C3N4 composites for the MAPR reaction under low temperature and normal pressure conditions. The optimized catalyst displayed a H2 yield of 19.5 mu mol g(-1) h(-1) at 80 degrees C. In situ diffuse reflectance FTIR spectroscopy and transient photovoltage tests provided a clear understanding of the effective MAPR reaction at low temperature and normal pressure.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Zhipeng Tian, Yongheng Lu, Junyao Wang, Riyang Shu, Chao Wang, Ying Chen
Summary: Hydrogen is an environmentally friendly and renewable energy source that can be effectively generated through aqueous phase reforming of biomass derivatives, contributing to solving the problems of energy scarcity and environmental pollution caused by fossil fuels. This paper reviews and discusses the research progress in hydrogen production by aqueous phase reforming of biomass derivatives, summarizing the catalytic reaction mechanisms and the effect of catalyst properties, and briefly prospecting the current challenges and future developments in this research field.
Article
Chemistry, Applied
Farshad Gholizadeh, Ali Izadbakhsh, Jiankun Huang, Yan Zi-Feng
Summary: A series of Ni-based catalysts supported on cubic ordered mesoporous alumina (COMA) were synthesized and tested in dry reforming of methane reaction. The 15%NiO/COMA catalyst showed the best catalytic performance, with stability test results proving no activity loss after 210 hours, demonstrating excellent catalytic stability of the COMA structure in DRM reaction.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Environmental
Jian Wang, Zibiao Liu, Rui Liang, Beibei Yan, Junyu Tao, Hong Su, Guanyi Chen
Summary: A novel method combining aqueous phase reforming and activated carbon adsorption was proposed to treat distiller's grain derived biogas plant wastewater. The alpha-MoO3 nanosheets with oxygen vacancies catalyst showed optimal hydrogen yield and organic pollutants removal efficiency during the APR process. This performance was attributed to shorter van der Waals heterostructures and abundant oxygen vacancies in the catalyst.
CHEMICAL ENGINEERING JOURNAL
(2022)
