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

doi:10.1016/j.jcat.2018.12.022

	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, Ziang 1,3; Lu, Wei 1; Feng, Chenghai 5; Chen, Xingkun 4; Zhu, Hejun 1; Yang, Ruoou 6; Dong, Wenda 1; Zhao, Min 1,3; Lyu, Yuan 1; Liu, Tao 1
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.
资助项目	Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences[XDA 21000000] ; Strategic Priority Research Program of the Chinese Academy of Science[XDB 17000000] ; National Key R&D Program of China[2017YFB0602500] ; Young Science Fund of the National Natural Science Foundation of China[21503218] ; [DICP DMTO201306]
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
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000460493700025
资助机构	Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; National Key R&D Program of China ; National Key R&D Program of China ; Young Science Fund of the National Natural Science Foundation of China ; Young Science Fund of the National Natural Science Foundation of China ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; National Key R&D Program of China ; National Key R&D Program of China ; Young Science Fund of the National Natural Science Foundation of China ; Young Science Fund of the National Natural Science Foundation of China ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; National Key R&D Program of China ; National Key R&D Program of China ; Young Science Fund of the National Natural Science Foundation of China ; Young Science Fund of the National Natural Science Foundation of China ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; National Key R&D Program of China ; National Key R&D Program of China ; Young Science Fund of the National Natural Science Foundation of China ; Young Science Fund of the National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165846]
专题	大连化学物理研究所_中国科学院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.