期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 49, 页码 25015-25028出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.05.049
关键词
WO3-ZrO2 supported ni; Ceria promotion; H-2-production; DRM; Reduction-oxidation-reduction cycle; Temperature programmed hydrogenation
资金
- Deanship of Scientific Research at the King Saud University [RGP119]
The ceria promoted 9 wt%WO3-91 wt%ZrO2 supported Nickel catalyst showed excellent activity and stability in methane conversion reaction, increasing H-2 yield and reducing carbon deposits.
ZrO2 supported Nickel catalyst, 9 wt%WO3-91 wt%ZrO2 supported Nickel catalyst and ceria promoted 9 wt%WO3-91 wt%ZrO2 supported Nickel catalyst (5NixCe/WZr catalyst) is synthesized via wet impregnation and characterized by XRD, UV-vis, CO2-TPD, H-2 TPR-CO2 TPD-H-2 TPR cycle, TPH, TPH followed by O-2-TPO and CO2-TPD followed by O-2-TPO. Due to limitation in surface re-oxidizing capability and shading of catalytic active sites by thermally stable carbonates; catalytic activity of unpromoted catalyst system is less. 5NixCe/WZr catalyst has extended CH4 decomposition sites, additional basic sites (during the reaction) for CO2 adsorption and excellent redox accompany (Ce (+4)/Ce (+3), W+(6)/W (+4)) for carbon oxidation and re-oxidizing capability of surface up to the pristine level. 2.5 wt% Ceria promotional addition is resulted into 78% H-2 yield constantly up to 420 min TOS. The carbon deposit over ceria promoted system (up to 2.5 wt%) is amorphous type, more easily/moderately reducible, oxidizable and removable. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据