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	Increasing the activity and selectivity of co-based fts catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium
	Zhao, Ziang1,3; Lu, Wei1; Feng, Chenghai5; Chen, Xingkun4; Zhu, Hejun1; Yang, Ruoou6; Dong, Wenda1; Zhao, Min1,3; Lyu, Yuan1; Liu, Tao1
刊名	Journal of catalysis
	2019-02-01
卷号	370页码:251-264
关键词	Fischer-tropsch synthesis Clean transportation fuels Activated carbon support Co-based catalysts Cr promoter
ISSN号	0021-9517
DOI	10.1016/j.jcat.2018.12.022
通讯作者	Zhu, hejun(zhuhj@dicp.ac.cn) ; Ding, yunjie(dyj@dicp.ac.cn)
英文摘要	Synthesis of clean transportation fuels from syngas (co + h-2) derived from coal, natural gas, and renewable biomass is an efficient method for reducing dependence on oil reservoirs, for which developing effective catalysts is significant. co-based catalysts supported by carbon materials possess advantages such as longer lifetimes and easy handling of wasted catalysts, but increasing their activity and selectivity remains a challenge. here we report using cr as a promoter to enhance the co hydrogenation process over activated carbon (ac)-supported co-based catalysts, namely, coxcr/ac catalysts. an almost twofold increase in activity (from 28.9% to 47.0%), accompanied by decreased ch4, olefin, and alcohol selectivity, was achieved by adding cr, resulting in a significant increase in the yield of transportation fuel products. the results of chemisorption indicate that cr facilitates h-2 adsorption and suppresses the formation of cobalt carbide (co2c), forming a relative h-rich and c-lean surface chemical environment, so that the co hydrogenation process and c-c coupling step are enhanced. structural characterizations show that cr exists in the form of cr2o3 and aggregates on the surfaces of the catalysts in a highly dispersed manner at relative low loadings (<2 wt%), and that co nanoparticles are partly covered by cr at high loadings. we suggest that the interaction between cr3+ and adjacent metallic co may play a pivotal role in the elevation of co hydrogenation activity and c5+ selectivity. (c) 2018 elsevier inc. all rights reserved.
WOS关键词	FISCHER-TROPSCH SYNTHESIS ; HIGHER ALCOHOLS ; MN PROMOTION ; CO/SIO2 ; OLEFINS ; SYNGAS ; HYDROGENATION ; CONVERSION ; SITES
WOS研究方向	Chemistry ; Engineering
WOS类目	Chemistry, Physical ; Engineering, Chemical
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000460493700025
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2372693
专题	大连化学物理研究所
通讯作者	Zhu, Hejun; Ding, Yunjie
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Zhejiang Normal Univ, Hangzhou Inst Adv Studies, Hangzhou 311231, Zhejiang, Peoples R China 5.Shaanxi Yanchang Petr Yulin Coal Chem Co, Yulin 719000, Shaanxi, Peoples R China 6.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Ziang,Lu, Wei,Feng, Chenghai,et al. Increasing the activity and selectivity of co-based fts catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium[J]. Journal of catalysis,2019,370:251-264.
APA	Zhao, Ziang.,Lu, Wei.,Feng, Chenghai.,Chen, Xingkun.,Zhu, Hejun.,...&Ding, Yunjie.(2019).Increasing the activity and selectivity of co-based fts catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium.Journal of catalysis,370,251-264.
MLA	Zhao, Ziang,et al."Increasing the activity and selectivity of co-based fts catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium".Journal of catalysis 370(2019):251-264.

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