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	Study of highly active Cu-based catalyst promoted by nickel-modified multi-walled carbon nanotubes for methanol synthesis
	Shen, BS ; Wu, XM ; Zhang, HB ; Lin, GD ; Dong, X ; Wu XM(吴晓明)
	2004-09-28
关键词	CU-ZNO-AL2O3 CATALYST NANOFIBERS H-2/CO/CO2 ZNO
英文摘要	By using chemical reduction-deposition method, a nickel-modified multi-walled carbon nanotube material, symbolized as y% Ni/MWCNT, was prepared. The H-2-TPD measurement showed that the modification of metallic nickel to the MWCNT could significantly enhance its capability of dissociatively adsorbing hydrogen. With the y% Ni/MWCNT as promoter, highly active y% Ni/MWCNT-promoted Cu-ZnO-Al2O3 catalysts, symbolized as Cu6Zn3Al1-x% (y% Ni/MWCNT), were prepared by co-precipitation method. It was experimentally found that appropriate incorporation of a minor amount of the y% Ni/MWCNT into the Cu6Zn3Al1 could significantly enhance the catalyst activity for methanol synthesis. Under the reaction conditions of 2.0 MPa, V(H-2) : V(CO) : V(CO2) : V(N-2) = 62 : 30 : 5 : 3, GHSV = 2700 ml, (STP) (.) h(-1) (.) (g-cat.)(-1), the observed CO-conversion over the Cu6Zn3Al1-12.5% (8% Ni/MWCNT) catalyst reached 34%, with the corresponding methanol-STY at 442 mg (.) h(-1) (.) (g-cat.)(-1), which was about 38% and 17% higher than those over the Cu6Zn3Al1 and Cu6Zn3Al1-12.5% MWCNT catalysts as contrast, respectively, at the respective optimal operation temperature, 513 K and 503 K. Characterization of the catalyst revealed that the pre-reduced Cu6Zn3Al1-12.5% (8% Ni/MWCNT) system could reversibly adsorb a considerably greater amount of hydrogen under atmospheric pressure at temperatures ranging from room temperature to similar to 573 K. This unique feature would be beneficial to generating microenvironments with relatively high stationary-state concentration of active hydrogen-adspecies on surface of the functioning catalyst, thus being favorable to increasing the rate of the CO hydrogenation reactions.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/68749]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Shen, BS,Wu, XM,Zhang, HB,et al. Study of highly active Cu-based catalyst promoted by nickel-modified multi-walled carbon nanotubes for methanol synthesis[J],2004.
APA	Shen, BS,Wu, XM,Zhang, HB,Lin, GD,Dong, X,&吴晓明.(2004).Study of highly active Cu-based catalyst promoted by nickel-modified multi-walled carbon nanotubes for methanol synthesis..
MLA	Shen, BS,et al."Study of highly active Cu-based catalyst promoted by nickel-modified multi-walled carbon nanotubes for methanol synthesis".(2004).

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