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Transformation of carbonaceous species and its influence on catalytic performance for iron-based Fischer-Tropsch synthesis catalyst
Ding, Mingyue1,2; Yang, Yong1; Wu, Baoshan1; Wang, Tiejun2; Ma, Longlong2; Xiang, Hongwei1; Li, Yongwang1
2011-12-01
发表期刊JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷号351页码:165-173
摘要Transformation behavior of carbonaceous species over a precipitated iron-based Fischer-Tropsch synthesis (FTS) catalyst was investigated by Mossbauer effect spectroscopy (MES), X-ray photoelectron spectroscopy (XPS), CO temperature-programmed desorption (CO-TPD), temperature-programmed hydrogenation (TPH), high resolution transmission electron microscopy (HRTEM) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The catalytic activities were tested in a fixed bed reactor. It was found that during carburization the fresh catalyst was firstly reduced from alpha-Fe(2)O(3) to Fe(3)O(4), accompanied simultaneously with the formation of atomic (C(alpha)) and polymeric (C(beta)) carbonaceous species on the surface of the catalyst. With time on stream the Fe(3)O(4) formed in the near-surface regions was converted gradually to chi-Fe(5)C(2), and the amounts of C(alpha) and C(beta) species presented an increasing trend. Subsequently, these species were combined partly together to form the graphitic-type (C(delta)) carbonaceous species, and the C(delta) species largely covered on the surface of iron carbides. The formation of iron carbides (especially for chi-Fe(5)C(2)), C(alpha) and C(beta) species on the surface layers promoted the catalytic activity, whereas the C(delta) species formed restrained the active sites for FTS reaction. (C) 2011 Elsevier B.V. All rights reserved.
文章类型Article
关键词Transformation Behavior Iron-based Catalyst Carbonaceous Species Iron Carbides Mossbauer Effect Spectroscopy
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.molcata.2011.10.001
研究领域[WOS]Chemistry
关键词[WOS]MANGANESE CATALYST ; FE CATALYSTS ; HYDROGENATION ; ACTIVATION ; REDUCTION ; SPECTROSCOPY ; BEHAVIOR ; SYNGAS
收录类别SCI
语种英语
WOS类目Chemistry, Physical
WOS记录号WOS:000298127200020
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10342
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Peoples R China
2.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
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Ding, Mingyue,Yang, Yong,Wu, Baoshan,et al. Transformation of carbonaceous species and its influence on catalytic performance for iron-based Fischer-Tropsch synthesis catalyst[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2011,351:165-173.
APA Ding, Mingyue.,Yang, Yong.,Wu, Baoshan.,Wang, Tiejun.,Ma, Longlong.,...&Li, Yongwang.(2011).Transformation of carbonaceous species and its influence on catalytic performance for iron-based Fischer-Tropsch synthesis catalyst.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,351,165-173.
MLA Ding, Mingyue,et al."Transformation of carbonaceous species and its influence on catalytic performance for iron-based Fischer-Tropsch synthesis catalyst".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 351(2011):165-173.
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