Study on the iron-silica interaction of a co-precipitated fe/sio2 fischer-tropsch synthesis catalyst
文献类型：期刊论文
| 作者 | Zhang, Cheng-Hua; Wan, Hai-Jun; Yang, Yong; Xiang, Hong-Wei; Li, Yong-Wang |
| 刊名 | Catalysis communications
 |
| 出版日期 | 2006-09-01 |
| 卷号 | 7期号:9页码:733-738 |
| 关键词 | Fischer-tropsch synthesis Iron-based catalyst Structural properties Interaction Hematite Maghemite Wustite Iron (ii) silicate |
| ISSN号 | 1566-7367 |
| DOI | 10.1016/j.catcom.2006.03.018 |
| 通讯作者 | Li, yong-wang(ywl@sxicc.ac.cn) |
| 英文摘要 | The structural properties and iron-silica interaction of the precipitated iron catalysts incorporated with or without silica have been investigated by powder x-ray diffraction (xrd), mossbauer spectroscopy, and temperature-programmed reduction (tpr) with h-2 consumption quantitative analysis. the fischer-tropsch synthesis (fts) performances of the catalysts were carried out in a slurry-phase continuously stirred tank reactor (cstr). it was found that, for as-prepared samples, nano-particles of iron oxide mixtures (alpha- and/or gamma-fe2o3) formed on the silica-incorporated catalyst, whereas well-crystallized hematite (alpha-fe2o3) is the only phase on the silica-free catalyst. after reduction in h-2, the observed phase in the silica-free catalyst is alpha-fe, whereas wustite (fexo) and iron (ii) silicate (fe2sio4) are the main phases in the silica-incorporated catalyst. in h-2-tpr, the fe3+ ions in the silica-incorporated catalyst are reduced to fe (0) via fe2+ ions as intermediate and the reduction extent of iron oxides obviously decreased comparing with the silica-free catalyst. the differences in structural properties and reduction behavior between the silica-free and the silica-incorporated catalysts may be due to the high dispersion effect of silica and the iron-silica interaction. the iron-silica interaction also decreases the fts activity and improves the light hydrocarbon selectivity. (c) 2006 elsevier b.v. all rights reserved. |
| WOS关键词 | MAGNETIC-PROPERTIES ; REDUCTION BEHAVIOR ; MOSSBAUER ; SUPPORT ; NANOPARTICLES ; SELECTIVITY ; MATRIX ; OXIDES ; SIO2 |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| WOS记录号 | WOS:000239672200025 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379394 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Yong-Wang |
| 作者单位 | 1.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Cheng-Hua,Wan, Hai-Jun,Yang, Yong,et al. Study on the iron-silica interaction of a co-precipitated fe/sio2 fischer-tropsch synthesis catalyst[J]. Catalysis communications,2006,7(9):733-738. |
| APA | Zhang, Cheng-Hua,Wan, Hai-Jun,Yang, Yong,Xiang, Hong-Wei,&Li, Yong-Wang.(2006).Study on the iron-silica interaction of a co-precipitated fe/sio2 fischer-tropsch synthesis catalyst.Catalysis communications,7(9),733-738. |
| MLA | Zhang, Cheng-Hua,et al."Study on the iron-silica interaction of a co-precipitated fe/sio2 fischer-tropsch synthesis catalyst".Catalysis communications 7.9(2006):733-738. |
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来源：中国科学院大学
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