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

CORC > 金属研究所 > 中国科学院金属研究所

	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 2; Yang, Zhenming 2; Zhang, Jinsong 2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2019
卷号	35 期号:1 页码:159-167
关键词	Foam catalyst Powder catalyst Benzaldehyde hydrogenation Ni loading Recyclability
ISSN号	1005-0302
DOI	10.1016/j.jmst.2018.09.018
通讯作者	Zhang, Jinsong(jshzhang@imr.ac.cn)
英文摘要	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.
资助项目	National Key Research & Development Program of China[2017YFB0310405]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000449263900022
资助机构	National Key Research & Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/130299]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Jinsong
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, 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.