IHEP OpenIR
Activated-carbon-supported K-Co-Mo catalysts for synthesis of higher alcohols from syngas
Lv, MM; Xie, W; Sun, S; Wu, GM; Zheng, LR; Chu, SQ; Gao, C; Bao, J; Zheng LR(郑黎荣); Chu SQ(储胜启)
2015
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
EISSN2044-4761
Volume5Issue:5Pages:2925-2934
SubtypeArticle
AbstractA series of activated-carbon-supported K-Co-Mo catalysts (K-Co-Mo/AC) were prepared by using a solgel method combined with incipient wetness impregnation. The catalyst structure was characterized by X-ray diffraction (XRD), N-2 adsorption-desorption, X-ray absorption fine structure spectroscopy and X-ray photoelectron spectroscopy, and their catalytic performance toward synthesis of higher alcohols from syngas was investigated. The large surface area and pore volume of the support facilitated the distribution of metal particles and high dispersion of metals. At low Mo loading, the Mo atoms on the activated carbon surface were mainly tetrahedrally coordinated Mo6+ species. With an increase in the Mo loading, the coordination environment of the surface Mo atoms gradually transformed from tetrahedrally coordinated Mo6+ to octahedrally coordinated Mo4+, indicating that an increase in the Mo loading promoted the reduction of Mo6+ species to Mo4+ species. After reduction, it was observed that a type of a lower state Mo delta+ (1 < delta < 4) species was present on the surface, which is suggested to be responsible for alcohol synthesis. Compared to the unsupported catalyst, K-Co-Mo/AC exhibited a significantly higher activity for alcohol formation. In particular, the C2+ alcohol content increased significantly. This can be attributed to the fact that the supported catalysts have a high active surface area, and the mesoporous structure is suggested to prolong the residence time of intermediates to form alcohols in the pores to some extent, thus promoting the formation of higher alcohols. Under the conditions of a Mo/AC weight ratio of 40% and a reduction temperature of 798 K, the K-Co-Mo/AC catalyst exhibited the highest activity for alcohol formation, which may be attributed to the high content of Mo delta+ (1 < delta < 4) species on the surface.
Subject AreaChemistry
DOI10.1039/c5cy00083a
Indexed BySCI ; EI
Language英语
WOS Research AreaChemistry, Physical
WOS SubjectChemistry
WOS IDWOS:000353641800043
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228557
Collection中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Lv, MM,Xie, W,Sun, S,et al. Activated-carbon-supported K-Co-Mo catalysts for synthesis of higher alcohols from syngas[J]. CATALYSIS SCIENCE & TECHNOLOGY,2015,5(5):2925-2934.
APA Lv, MM.,Xie, W.,Sun, S.,Wu, GM.,Zheng, LR.,...&储胜启.(2015).Activated-carbon-supported K-Co-Mo catalysts for synthesis of higher alcohols from syngas.CATALYSIS SCIENCE & TECHNOLOGY,5(5),2925-2934.
MLA Lv, MM,et al."Activated-carbon-supported K-Co-Mo catalysts for synthesis of higher alcohols from syngas".CATALYSIS SCIENCE & TECHNOLOGY 5.5(2015):2925-2934.
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