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Enhancement of isobutane/butene alkylation by aromatic-compound additives in strong Bronsted acid
Zhang, Honghua1,2; Tang, Hongguo2; Xu, Jiakuo2; Li, Yajing2; Yang, Zhiqiang2; Liu, Ruixia2; Zhang, Suojiang2; Wang, Yanji1
2018-11-01
Source PublicationFUEL
ISSN0016-2361
Volume231Pages:224-233
Abstract

The aromatic-compound additive in sulfuric acid (H2SO4) was found to promote isobutane/butene alkylation significantly. The selectivity of isooctane (C-8) and the alkylate research octane number increased by 23.46% and 5.09, respectively, when thiophene was added to H2SO4, especially. The proportion of trimethylpentanes can be improved from 58.57% to 84.58%, and the ratio of trimethylpentanes to dimethylhexanes was doubled, compared with that in the presence of H2SO4 alone. The improved performance in the presence of thiophene additive in H2SO4 is attributed to the improvement in carbenium-ion stability and the acceleration of hydrogen proton release, because of the existence of electron-rich pi-bond compounds, and the substitution of thiophene in the alpha site by the sulfonic group and isobutane/butene. Reaction parameters such as reaction temperature, reaction time, stirring speed, feed rate, and acid/hydrocarbon volumetric ratio were also investigated in detail. The synergetic mechanism of thiophene-H2SO4 on isobutane/butene alkylation was also speculated.

KeywordAromatic-compound Additives Sulfuricacid Isobutane/butene Alkylation Trimethylpentane Selectivity
DOI10.1016/j.fuel.2018.05.081
Language英语
WOS KeywordIonic Liquid Catalysts ; Sulfuric-acid ; Olefins ; Butene ; 1-butene ; H2so4
Funding ProjectNational Natural Science Foundation of China Petroleum & Chemical Corporation Joint Fund[U1662129] ; One Hundred Talent Program of CAS ; Key Program of National Natural Science Foundation of China[91434203] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC0 11] ; Fund of State Key Laboratory of Multiphase Complex Systems, IPE, CAS[MPCS-2015-A-05]
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China Petroleum & Chemical Corporation Joint Fund ; One Hundred Talent Program of CAS ; Key Program of National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Fund of State Key Laboratory of Multiphase Complex Systems, IPE, CAS
WOS IDWOS:000435217500026
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24955
Collection多相复杂系统国家重点实验室
Corresponding AuthorLiu, Ruixia; Zhang, Suojiang
Affiliation1.Hebei Univ Technol, Sch Chem Engn, Tianjin 300130, Peoples R China
2.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, Key Lab Green Proc & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Honghua,Tang, Hongguo,Xu, Jiakuo,et al. Enhancement of isobutane/butene alkylation by aromatic-compound additives in strong Bronsted acid[J]. FUEL,2018,231:224-233.
APA Zhang, Honghua.,Tang, Hongguo.,Xu, Jiakuo.,Li, Yajing.,Yang, Zhiqiang.,...&Wang, Yanji.(2018).Enhancement of isobutane/butene alkylation by aromatic-compound additives in strong Bronsted acid.FUEL,231,224-233.
MLA Zhang, Honghua,et al."Enhancement of isobutane/butene alkylation by aromatic-compound additives in strong Bronsted acid".FUEL 231(2018):224-233.
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