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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 PublicationFUEL PROCESSING TECHNOLOGY
Volume92Issue:12Pages:2353-2359
AbstractEffects 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.
SubtypeArticle
KeywordFischer-tropsch Synthesis Iron-based Catalyst Reducing Agents Iron Carbides Mossbauer Effect Spectroscopy
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.fuproc.2011.08.011
WOS Subject ExtendedChemistry ; Energy & Fuels ; Engineering
Indexed BySCI
Language英语
WOS SubjectChemistry, Applied ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000297873500021
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10408
Collection中国科学院广州能源研究所
Affiliation1.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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