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| Effect of reducing agents on microstructure and catalytic performance of precipitated iron-manganese catalyst for Fischer-Tropsch synthesis | |
| Ding, Mingyue1,2; Yang, Yong1; Wu, Baoshan1; Wang, Tiejun2; Xiang, Hongwei1; Li, Yongwang1 | |
| 2011-12-01 | |
| Source Publication | FUEL PROCESSING TECHNOLOGY
 |
| Volume | 92Issue:12Pages:2353-2359 |
| Abstract | Effects of reducing agents on the textural properties and bulk/surface phase compositions of a precipitated iron-manganese catalyst were investigated by N(2)-physisorption, X-ray photoelectron spectroscopy (XRD), Mossbauer effect spectroscopy (MES), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy (LRS). Fischer-Tropsch synthesis (FTS) was performed in a slurry-phase continuously stirred tank reactor. The characterization results indicated that the hematite in the fresh catalyst was converted mainly to magnetite in H(2) atmosphere without the formation of intermediate metallic iron. Large amounts of Fe(3)O(4) and small amounts of epsilon'-Fe(2.2)C and chi-Fe(2.5)C were formed after syngas pretreatment. In contrast, CO activation led to the formation of large amounts of chi-Fe(2.5)C and carbonaceous species on the surface of magnetite. In the FTS reaction, the CO-activated catalyst presented the highest initial activity compared to the H(2) and syngas-reduced catalysts, and remained unchanged in the activity following the transformation of iron carbides to Fe(3)O(4). Furthermore, the FTS activity of the H(2)-reduced catalyst increased gradually accompanied with the conversion of magnetite to iron carbides. All of the results suggested that the formation of iron carbides (especially for chi-Fe(2.5)C) on the surface layers provides probably the active sites for FTS, whereas the Fe(3)O(4) formed plays a negligible role in the FTS activity. (C) 2011 Elsevier B.V. All rights reserved. |
| Subtype | Article |
| Keyword | Fischer-tropsch Synthesis Iron-based Catalyst Reducing Agents Iron Carbides Mossbauer Effect Spectroscopy |
| WOS Headings | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1016/j.fuproc.2011.08.011 |
| WOS Subject Extended | Chemistry ; Energy & Fuels ; Engineering |
| Indexed By | SCI |
| Language | 英语 |
| WOS Subject | Chemistry, Applied ; Energy & Fuels ; Engineering, Chemical |
| WOS ID | WOS:000297873500021 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/10408 |
| Collection | 中国科学院广州能源研究所 |
| Affiliation | 1.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China |
| Recommended Citation GB/T 7714 | Ding, Mingyue,Yang, Yong,Wu, Baoshan,et al. Effect of reducing agents on microstructure and catalytic performance of precipitated iron-manganese catalyst for Fischer-Tropsch synthesis[J]. FUEL PROCESSING TECHNOLOGY,2011,92(12):2353-2359. |
| APA | Ding, Mingyue,Yang, Yong,Wu, Baoshan,Wang, Tiejun,Xiang, Hongwei,&Li, Yongwang.(2011).Effect of reducing agents on microstructure and catalytic performance of precipitated iron-manganese catalyst for Fischer-Tropsch synthesis.FUEL PROCESSING TECHNOLOGY,92(12),2353-2359. |
| MLA | Ding, Mingyue,et al."Effect of reducing agents on microstructure and catalytic performance of precipitated iron-manganese catalyst for Fischer-Tropsch synthesis".FUEL PROCESSING TECHNOLOGY 92.12(2011):2353-2359. |
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