Selective hydrogenation of acetylene in an ethylene-rich stream over silica supported Ag-Ni bimetallic catalysts

	Selective hydrogenation of acetylene in an ethylene-rich stream over silica supported Ag-Ni bimetallic catalysts
	Pei, Guang Xian 1,2; Liu, Xiao Yan 2; Wang, Aiqin 2; Su, Yang 2; Li, Lin 2; Zhang, Tao 2
刊名	APPLIED CATALYSIS A-GENERAL
	2017-09-05
卷号	545 页码:90-96
关键词	Ni Ag Acetylene Selective hydrogenation Excess ethylene
英文摘要	Semi-hydrogenation of acetylene in an ethylene-rich stream is an industrially important process. Recent work on the purification of ethylene mainly focuses on the modification of Pd catalysts; little attention has been paid to the development of alternative catalysts with low-cost metals. Herein, a series of Ag-Ni/SiO2 bimetallic catalysts, with varied Ni/Ag atomic ratios, were prepared by wetness co-impregnation method. Their activity for the selective hydrogenation of acetylene in an ethylene-rich stream was evaluated, which showed that the introduction of Ag decreased the formation of both ethane and methane, thus increased the ethylene selectivity. The ethylene selectivity over the AgNi0.25/SiO2 catalyst was increased by > 600% when compared with the corresponding monometallic Ni-0.25/SiO2 as well as the simple physical mixture of the monometallic Ag/SiO2 and Ni-0.25/SiO2 catalysts. As was verified by a combination of the X-ray diffraction, high angular annular dark field scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy under scanning transmission electron microscopy results, decreased Ni content induced the sintering of the bimetallic nanoparticles while with uniform dispersion. Temperature-programmed reduction results demonstrated that, compared with the corresponding monometallic catalysts, both the reduction of AgOx and NiOx were promoted in the Ag-Ni/SiO2 bimetallic catalysts. In-situ Fourier-transform infrared spectroscopy results also illustrated obvious interaction between Ag and Ni. The contact between Ag and Ni may account for the enhanced ethylene selectivity.
WOS标题词	Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
类目[WOS]	Chemistry, Physical ; Environmental Sciences
研究领域[WOS]	Chemistry ; Environmental Sciences & Ecology
关键词[WOS]	PD CATALYSTS ; CHEMOSELECTIVE HYDROGENATION ; UNSATURATED-HYDROCARBONS ; ALKYNE HYDROGENATION ; PALLADIUM CATALYSTS ; CU/AL2O3 CATALYSTS ; NICKEL-CATALYSTS ; DIMETHYL OXALATE ; ALLOY CATALYSTS ; EXCESS ETHYLENE
收录类别	SCI
语种	英语
WOS记录号	WOS:000410252900011
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/149867]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, IChEM Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Pei, Guang Xian,Liu, Xiao Yan,Wang, Aiqin,et al. Selective hydrogenation of acetylene in an ethylene-rich stream over silica supported Ag-Ni bimetallic catalysts[J]. APPLIED CATALYSIS A-GENERAL,2017,545:90-96.
APA	Pei, Guang Xian,Liu, Xiao Yan,Wang, Aiqin,Su, Yang,Li, Lin,&Zhang, Tao.(2017).Selective hydrogenation of acetylene in an ethylene-rich stream over silica supported Ag-Ni bimetallic catalysts.APPLIED CATALYSIS A-GENERAL,545,90-96.
MLA	Pei, Guang Xian,et al."Selective hydrogenation of acetylene in an ethylene-rich stream over silica supported Ag-Ni bimetallic catalysts".APPLIED CATALYSIS A-GENERAL 545(2017):90-96.