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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
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume351Pages:165-173
AbstractTransformation 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.
SubtypeArticle
KeywordTransformation Behavior Iron-based Catalyst Carbonaceous Species Iron Carbides Mossbauer Effect Spectroscopy
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.molcata.2011.10.001
WOS Subject ExtendedChemistry
WOS KeywordMANGANESE CATALYST ; FE CATALYSTS ; HYDROGENATION ; ACTIVATION ; REDUCTION ; SPECTROSCOPY ; BEHAVIOR ; SYNGAS
Indexed BySCI
Language英语
WOS SubjectChemistry, Physical
WOS IDWOS:000298127200020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10342
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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