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A series of copper-free ternary oxide catalysts ZnAlCex used for hydrogen production via dimethyl ether steam reforming
Zhang, LJ; Meng, M; Wang, XJ; Zhou, S; Yang, LJ; Zhang, TY; Zheng, LR; Zhang, J; Hu, TD;郑黎荣; Zhang J(张静); Hu TD(胡天斗)
2014
发表期刊JOURNAL OF POWER SOURCES
卷号268页码:331-340
摘要Ce-substituted ternary oxide catalysts ZnAlCex were prepared and employed in dimethyl ether steam reforming (DME SR) to produce hydrogen. XRD, XAFS (XANES & EXAFS), H2O-TPD, CH3OH-TPD and TPSR techniques were used for catalyst characterization. It is found that the catalytic performance of these catalysts is dependent on Ce content. The catalyst containing 20 wt% CeO2 exhibits the best catalytic performance. Its calculated TOF (0.034 s(-1)) is nearly three times to that of ZnAlO. The kinetic results reveal that the addition of 20 wt% CeO2 to ZnAlCex greatly decreases the apparent activation energy (Ea) of DME SR, due to the formation of new reaction sites such as Ce4+-O-Zn2+ linkages. XRD and EXAFS analyses indicate that Ce addition can not only decrease the crystallite size of ZnO and ZnAl2O4, but also tune the relative contents of them. The results of H2O-TPD and CH3OH-TPD show that Ce addition can lower H-2 desorption temperature, which accounts well for the better catalytic performance of ZnAlCex. It is worth noting that the Zn-based catalysts display much lower CO selectivity than the Cu-based one, especially the Ce-substituted ZnAlCex. Start-off durability tests demonstrate that this series of catalysts also possess high catalytic stability. (C) 2014 Elsevier B.V. All rights reserved.
关键词Dimethyl ether Steam reforming Hydrogen production Zinc-based catalyst
学科领域Electrochemistry; Energy & Fuels
DOI10.1016/j.jpowsour.2014.06.045
收录类别SCI
WOS记录号WOS:000340311800043
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225155
专题多学科研究中心
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GB/T 7714
Zhang, LJ,Meng, M,Wang, XJ,et al. A series of copper-free ternary oxide catalysts ZnAlCex used for hydrogen production via dimethyl ether steam reforming[J]. JOURNAL OF POWER SOURCES,2014,268:331-340.
APA Zhang, LJ.,Meng, M.,Wang, XJ.,Zhou, S.,Yang, LJ.,...&胡天斗.(2014).A series of copper-free ternary oxide catalysts ZnAlCex used for hydrogen production via dimethyl ether steam reforming.JOURNAL OF POWER SOURCES,268,331-340.
MLA Zhang, LJ,et al."A series of copper-free ternary oxide catalysts ZnAlCex used for hydrogen production via dimethyl ether steam reforming".JOURNAL OF POWER SOURCES 268(2014):331-340.
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