Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| 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 | |
| Source Publication | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| Volume | 44Issue:4Pages:769-775 |
| Abstract | 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. |
| Subtype | Article |
| WOS Headings | Science & Technology ; Technology |
| DOI | 10.1021/ie040097o |
| WOS Subject Extended | Engineering |
| WOS Keyword | SYNTHESIS GAS ; BIMETALLIC CATALYSTS ; LIGHT-HYDROCARBONS ; COBALT CATALYSTS ; CONVERSION ; ISOALKANES ; ZEOLITES ; HZSM-5 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Subject | Engineering, Chemical |
| WOS ID | WOS:000227055500016 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/10210 |
| Collection | 中国科学院广州能源研究所 |
| Affiliation | 1.Toyama Univ, Sch Engn, Dept Appl Chem, Toyama 9308555, Japan 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China |
| Recommended Citation 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. |
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