The role of additives (Ba, Zr, and Nd) on Ce/Cu/Al2O3 catalyst for water-gas shift reaction

被引：16
作者：
Na, Hyun-Suk [1 ]
Ahn, Seon-Yong [1 ]
Lee, Yeol-Lim [1 ]
Kim, Kyoung-Jin [1 ]
Jang, Won-Jun [2 ]
Shim, Jae-Oh [3 ]
Roh, Hyun-Seog [1 ]
机构：
[1] Yonsei Univ, Dept Environm Engn, 1 Yonseidae Gil, Wonju 26493, Gangwon, South Korea
[2] Kyungnam Univ, Dept Environm & Energy Engn, 7 Kyungnamdaehak Ro, Chang Won 51767, Gyeongnam, South Korea
[3] Wonkwang Univ, Dept Chem Engn, 460 Iksandae Ro, Iksan 54538, Jeonbuk, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 46期
关键词：
High temperature water-gas shift; Oxygen vacancy concentration; Strong metal to support interaction; Barium; Zirconium; Neodymium; OXYGEN VACANCY CONCENTRATION; FREE HYDROGEN-PRODUCTION; OXIDE CATALYSTS; CEO2; SUPPORT; MIXED-OXIDE; TEMPERATURE; PERFORMANCE; CERIA; STEAM; CU;
D O I：
10.1016/j.ijhydene.2020.06.278
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Enhanced catalytic performance is required to increase the efficiency of hydrogen production from waste-derived synthesis gas via the high-temperature water-gas shift reaction (HT-WGSR). Herein, the effects of barium, zirconium, and neodymium doping on the physico-chemical properties of a Ce/Cu/Al2O3 catalyst as well as its catalytic performance for HT-WGSR are investigated. Ce/Cu/Al2O3 catalysts with various additives (barium, zirconium, and neodymium) prepared via a sequential impregnation method have been characterized by using N-2 adsorption-desorption isotherms, X-ray powder diffraction (XRPD), N2O-titration, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and hydrogen temperature-programmed reduction (H-2-TPR). Advantageously, barium and zirconium addition enhance the HT-WGSR activity and stability of the Ce/Cu/Al2O3 catalyst, whereas neodymium doping has a negative effect. Regarding the correlation of catalytic performance with the characterization results, it was found that catalytic activity and stability strongly depended on their oxygen vacancy concentration and strong-metal to support interaction. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码：24726 / 24737
页数：12
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