Optimizing both the CoMo/Al2O3 catalyst and the technology for selectivity enhancement in the hydrodesulfurization of FCC gasoline

doi:10.1016/j.apcata.2019.02.025

	Optimizing both the CoMo/Al2O3 catalyst and the technology for selectivity enhancement in the hydrodesulfurization of FCC gasoline
	Zhang, Cen 1,2; Liu, Xinyi 1,2; Liu, Tiefeng 2; Jiang, Zongxuan 2; Li, Can 2
刊名	APPLIED CATALYSIS A-GENERAL
	2019-04-05
卷号	575 页码:187-197
关键词	CoMo/Al2O3 MoS2 morphology tuning Recombination mercaptan Selective HDS FCC gasoline
ISSN号	0926-860X
DOI	10.1016/j.apcata.2019.02.025
通讯作者	Li, Can(canli@dicp.ac.cn)
英文摘要	Herein, a series of alumina supports were prepared by rehydration-dehydration of the traditional gamma-Al2O3 under different hydrothermal temperatures. After loading CoMo species, it was found the selectivity factor of corresponding CoMo/Al2O3 catalysts was improved greatly from 1.21 to 2.51 with the increased hydrothermal temperature of alumina supports in the hydrodesulfurization (HDS) of a model fluid catalytic cracking (FCC) naphtha. The improved HDS selectivity is attributed to the weakened metal-support interaction and lowered dispersion of MoS2 particles, resulting in catalysts with larger edge-to-corner ratios of CoMoS slabs ((f(e)/f(c))(CoMo)). Besides, the recombination mercaptans formed by reaction of produced H2S and olefins were found as a big challenge to reach a high HDS conversion (S < 10 ppm) when only using the selective HDS catalyst (one-unit process). Therefore, a two-unit process has been developed by using a selective HDS catalyst to remove the most of the refractory sulfur compounds firstly, after which using another mercaptan-removing catalyst to deal with the recombination mercaptans specially. The catalytic results show that the two-unit process has a smaller olefin loss (4.38 v%) than that of one-unit process (7.08 v%) when reducing the sulfur concentration of a heavy FCC fraction to less than 10 ppm, thus resulting in a 0.7 unit less of the research octane number loss. The present work shows that high HDS conversion and low olefin hydrogenation conversion in selective HDS of FCC gasoline can be achieved through optimization design of both the selective HDS catalyst and the whole technology.
资助项目	NSFC-Liaoning[U1508205] ; Haldor Topsoe A/S
WOS关键词	DEEP DESULFURIZATION ; SULFIDE CATALYSTS ; ACTIVE PHASES ; ALUMINA ; HDS ; PERFORMANCE ; MORPHOLOGY ; TEMPERATURE ; SUPPORTS ; ACIDITY
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000462801700021
资助机构	NSFC-Liaoning ; NSFC-Liaoning ; Haldor Topsoe A/S ; Haldor Topsoe A/S ; NSFC-Liaoning ; NSFC-Liaoning ; Haldor Topsoe A/S ; Haldor Topsoe A/S ; NSFC-Liaoning ; NSFC-Liaoning ; Haldor Topsoe A/S ; Haldor Topsoe A/S ; NSFC-Liaoning ; NSFC-Liaoning ; Haldor Topsoe A/S ; Haldor Topsoe A/S
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165770]
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	Li, Can
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Cen,Liu, Xinyi,Liu, Tiefeng,et al. Optimizing both the CoMo/Al2O3 catalyst and the technology for selectivity enhancement in the hydrodesulfurization of FCC gasoline[J]. APPLIED CATALYSIS A-GENERAL,2019,575:187-197.
APA	Zhang, Cen,Liu, Xinyi,Liu, Tiefeng,Jiang, Zongxuan,&Li, Can.(2019).Optimizing both the CoMo/Al2O3 catalyst and the technology for selectivity enhancement in the hydrodesulfurization of FCC gasoline.APPLIED CATALYSIS A-GENERAL,575,187-197.
MLA	Zhang, Cen,et al."Optimizing both the CoMo/Al2O3 catalyst and the technology for selectivity enhancement in the hydrodesulfurization of FCC gasoline".APPLIED CATALYSIS A-GENERAL 575(2019):187-197.