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Synthesis, characterization, and application of metal-free acidic ionic liquids as catalysts for oligomerization of isobutene
Chen, Jian1,2; Wang, Hongyan2; Deng, Lili2,3; Wang, Hui1,2; Li, Zengxi1,3
2021-09-01
Source PublicationFUEL
ISSN0016-2361
Volume299Pages:12
AbstractButene 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.
KeywordOligomerization Isobutene Metal-free Acidic ionic liquids
DOI10.1016/j.fuel.2021.120876
Language英语
WOS KeywordLIGHT OLEFINS ; ALKYLATION ; DIMERIZATION ; EFFICIENT ; TRIMERIZATION ; COMPONENTS ; ZEOLITE ; SILICA
Funding ProjectNational 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 Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundations of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program ; K. C. Wong Education Foundation
WOS IDWOS:000652639200001
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48832
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Hui; Li, Zengxi
Affiliation1.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
2.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
3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
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.
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