Synthesis, characterization, and application of metal-free acidic ionic liquids as catalysts for oligomerization of isobutene

doi:10.1016/j.fuel.2021.120876

	Synthesis, characterization, and application of metal-free acidic ionic liquids as catalysts for oligomerization of isobutene
	Chen, Jian 2,3; Wang, Hongyan 3; Deng, Lili 1,3; Wang, Hui 2,3; Li, Zengxi 1,2
刊名	FUEL
	2021-09-01
卷号	299 页码:12
关键词	Oligomerization Isobutene Metal-free Acidic ionic liquids
ISSN号	0016-2361
DOI	10.1016/j.fuel.2021.120876
英文摘要	Butene oligomerization followed by hydrogenation is regarded as a promising way to produce alkylate oil, and the challenge of this process is the oriented conversion of butene to octene, which closely relates to the alkylate quality. Ionic liquids (ILs) are a kind of promising catalyst for olefin oligomerization. In this study, a series of functional metal-free acidic ILs (11 in total) were synthesized, characterized, and used for the oligomerization of isobutene. It was found that among the tested neat ILs, sulfobutyltriethylammonium triflate ([TENBs][CF3SO3]) exhibited the best performance. This IL catalyst could be reused for 25 times, without obvious loss in catalytic activity. To improve catalytic activity of the neat IL, composite ILs formed by mixing [TENBs][CF3SO3] with a second functional IL were developed. In the best composite system with tunable acidity, isobutene conversion could increase by similar to 88% compared with the neat IL, and meantime the dimer selectivity could increase to 79%. The conversion could increase from 25% to over 80% in the best composite system with enhanced mass transfer capability. Spectroscopic characterization and Gaussian simulation revealed the different catalytic behaviors of these ILs, which demonstrated that ILs with lower bond dissociation enthalpy (< 521 KJ.mol(-1)) and proper binding energy with isobutene (27 to 20 KJ.mol(-1)) could efficiently catalyze isobutene oligomerization, the acidic active sites were from the sulfonic acid group in the cation and the acidic anion, and that deactivation of the IL catalyst after being used for 29 times could be attributed to the loss of the acid sites in both the cation and anion.
资助项目	National Natural Science Foundations of China[21878311] ; National Natural Science Foundations of China[21808219] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A12] ; CAS Pioneer Hundred Talents Program ; K. C. Wong Education Foundation[GJTD-2018-04]
WOS关键词	LIGHT OLEFINS ; ALKYLATION ; DIMERIZATION ; EFFICIENT ; TRIMERIZATION ; COMPONENTS ; ZEOLITE ; SILICA
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000652639200001
资助机构	National Natural Science Foundations of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program ; K. C. Wong Education Foundation
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/48831]
专题	中国科学院过程工程研究所
通讯作者	Wang, Hui; Li, Zengxi
作者单位	1.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, Inst Proc Engn,Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Chen, Jian,Wang, Hongyan,Deng, Lili,et al. Synthesis, characterization, and application of metal-free acidic ionic liquids as catalysts for oligomerization of isobutene[J]. FUEL,2021,299:12.
APA	Chen, Jian,Wang, Hongyan,Deng, Lili,Wang, Hui,&Li, Zengxi.(2021).Synthesis, characterization, and application of metal-free acidic ionic liquids as catalysts for oligomerization of isobutene.FUEL,299,12.
MLA	Chen, Jian,et al."Synthesis, characterization, and application of metal-free acidic ionic liquids as catalysts for oligomerization of isobutene".FUEL 299(2021):12.