Selective synthesis of middle isoparaffins via a two-stage Fischer-Tropsch reaction: Activity investigation for a hybrid catalyst

doi:10.1021/ie040097o

GIEC OpenIR > 中国科学院广州能源研究所

	Selective synthesis of middle isoparaffins via a two-stage Fischer-Tropsch reaction: Activity investigation for a hybrid catalyst
	Zhao, TS ; Chang, J ; Yoneyama, Y ; Tsubaki, N
	2005-02-16
发表期刊	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷号	44 期号:4 页码:769-775
摘要	The activity of hybrid catalysts for the direct isoparaffin synthesis, especially C-4-C-6 with a very high octane number, from Fischer-Tropsch synthesis (FTS) in a two-stage reactor was investigated. The hybrid of CO/SiO2 and H-ZSM-5 was used as the first-stage reaction catalyst, and different types of H zeolites alone or their hybrid with Pd/SiO2 were used as the second-stage reaction catalysts. The obtained results demonstrated that the carbon number of products could terminate at 6 and isoparaffin hydrocarbons could be synthesized in very high selectivity from synthesis gas compared with that in a single-stage reaction using a physically mixed CO/SiO2 and H-ZSM-5 catalyst. The first-stage CO/SiO2 + H-ZSM-5 catalyst made the products mainly distribute in the C-1-C-11 range and considerably increase in the corresponding isoparaffins because of successive cracking, as well as isomerization, of the primary FTS products on H-ZSM-5. The selectivities of isoparaffins with much lower carbon number were further raised through the hydrocracking and isomerization of the first-stage reaction products on the second-stage H-zeolite catalysts in the presence of hydrogen. In addition, the effect of the reaction temperature suggested that an appropriate temperature combination of the first- and second-stage reactions was necessary. Using CO/SiO2 + H-ZSM-5 and H-Beta + Pd/SiO2 as the first- and second-stage catalysts, respectively, with a suitable temperature selection for the first- and secondstage reactor, a selectivity of 64.4% for C-4-C-6 isoparaffins was achieved. With the hybrid of H-ZSM-15 in the first-stage catalyst, heavier hydrocarbon deposition was removed near CO/SiO2 and the catalyst life was stabilized; with the hybrid of Pd/SiO2 in the second-stage catalyst, the acid sites of H zeolites were maintained and strengthened by means of supposed hydrogen spillover. As a result of the overall effect, the lifetime of the catalysts was effectively extended.
文章类型	Article
WOS标题词	Science & Technology ; Technology
DOI	10.1021/ie040097o
研究领域[WOS]	Engineering
关键词[WOS]	SYNTHESIS GAS ; BIMETALLIC CATALYSTS ; LIGHT-HYDROCARBONS ; COBALT CATALYSTS ; CONVERSION ; ISOALKANES ; ZEOLITES ; HZSM-5
收录类别	SCI
语种	英语
WOS类目	Engineering, Chemical
WOS记录号	WOS:000227055500016
引用统计	被引频次：46[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/10210
专题	中国科学院广州能源研究所
作者单位	1.Toyama Univ, Sch Engn, Dept Appl Chem, Toyama 9308555, Japan 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhao, TS,Chang, J,Yoneyama, Y,et al. Selective synthesis of middle isoparaffins via a two-stage Fischer-Tropsch reaction: Activity investigation for a hybrid catalyst[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2005,44(4):769-775.
APA	Zhao, TS,Chang, J,Yoneyama, Y,&Tsubaki, N.(2005).Selective synthesis of middle isoparaffins via a two-stage Fischer-Tropsch reaction: Activity investigation for a hybrid catalyst.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,44(4),769-775.
MLA	Zhao, TS,et al."Selective synthesis of middle isoparaffins via a two-stage Fischer-Tropsch reaction: Activity investigation for a hybrid catalyst".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 44.4(2005):769-775.