A comparative study of Ni/Al2O3-SiC foam catalysts and powder catalysts for the liquid-phase hydrogenation of benzaldehyde

doi:10.1016/j.jmst.2018.09.018

IMR OpenIR

	A comparative study of Ni/Al2O3-SiC foam catalysts and powder catalysts for the liquid-phase hydrogenation of benzaldehyde
	Li, Kai 1,2; Jiao, Yilai 1; Yang, Zhenming 1; Zhang, Jinsong 1
通讯作者	Zhang, Jinsong(jshzhang@imr.ac.cn)
	2019
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	35 期号:1 页码:159-167
摘要	In this study, Al2O3-washcoated SiC (Al2O3-SiC) foams and Al2O3 powder were employed as the supports of a Ni catalyst for the liquid-phase hydrogenation of benzaldehyde. A series of Ni/Al2O3-SiC foam catalysts and Ni/Al2O3 powder catalysts with a Ni loading from 10 wt% to 37 wt% of the weight of Al2O3 were first prepared by a deposition-precipitation (DP) method. The catalytic activity and recyclability of both kinds of catalysts were then compared. Although it had a smaller accessible surface area with the reactant, the foam catalyst with a Ni loading of 16 wt% exhibited a slightly higher conversion of benzaldehyde after 6 h (of 99.3%) in comparison with the Ni/Al2O3 catalyst with identical Ni loading (conversion of 97.5%). When the Ni loading increased from 16 wt% to 37 wt%, the reaction rate obtained with the foam catalyst increased significantly from 0.108 to 0.204 mol L-1 h( -1), whereas the reaction rate obtained with the powder catalyst increased from 0.106 to 0.123 mol L-1 h( -1). Furthermore, the specific activity (moles of benzaldehyde consumed by 1 g min(-1) of Ni) of the foam catalyst with a Ni loading above 30 wt% was superior to that of the powder catalyst because of its smaller Ni-particle size and higher mass-transfer rate. The foam catalyst displayed a high recyclability as a function of run times owing to the strong interaction between the Ni component and the Al2O3 coating. The conversion of benzaldehyde over the foam catalyst remained almost unchanged after being used 8 times. In comparison, a drop of 43% in the conversion of benzaldehyde with the powder catalyst was observed after being used 7 times due to the leaching of the Ni component. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Foam catalyst Powder catalyst Benzaldehyde hydrogenation Ni loading Recyclability
资助者	National Key Research & Development Program of China
DOI	10.1016/j.jmst.2018.09.018
收录类别	SCI
语种	英语
资助项目	National Key Research & Development Program of China[2017YFB0310405]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000449263900022
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/130300
专题	中国科学院金属研究所
通讯作者	Zhang, Jinsong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Kai,Jiao, Yilai,Yang, Zhenming,et al. A comparative study of Ni/Al2O3-SiC foam catalysts and powder catalysts for the liquid-phase hydrogenation of benzaldehyde[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(1):159-167.
APA	Li, Kai,Jiao, Yilai,Yang, Zhenming,&Zhang, Jinsong.(2019).A comparative study of Ni/Al2O3-SiC foam catalysts and powder catalysts for the liquid-phase hydrogenation of benzaldehyde.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(1),159-167.
MLA	Li, Kai,et al."A comparative study of Ni/Al2O3-SiC foam catalysts and powder catalysts for the liquid-phase hydrogenation of benzaldehyde".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.1(2019):159-167.