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Isobutane/Butene Alkylation on Supported Phosphotungstic Acid Promoted by Hexadecylphosphate |
Author Name | Affiliation | E-mail | XU Meng-Xia | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | WANG Yi-Bo | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | DENG Chang-Shun | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | DING Li-Ping | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | XU Yi-Da | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | XUE Nian-Hua | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | GUO Xue-Feng | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | PENG Lu-Ming | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | | DING Wei-Ping | Key Lab of Mesoscopic Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China | dingwp@nju.edu.cn |
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Abstract: The alkylation of isobutane/butene is an important reaction to produce high-octane gasoline. Replacement of liquid acid by solid acid to catalyze this reaction is the focus of the study. In this work, solid acid catalysts with hydrophobic surface were prepared by decorating hexadecylphosphate (HDPA) on SiO2-supported heteropolyacids samples with impregnatiom method, whose structure is similar as the fruit of platanus. These catalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), N2 and i-C4H10 sorption. And the performances of the catalysts for the alkylation of isobutane/butene were evaluated using a fixed bed micro-reactor. The results show that the HDPA-modification enhances the adsorption of the hydrocarbon reactants on the surface of catalyst, which helps to reduce the polymerization of butene and to inhibit the deposition of coke on the surface of catalyst, leading to an improved selectivity of high-octane products and prolonged life of catalysts. The catalyst had an optimal catalytic performance when the HPW load was 30%(w/w) and the modified amount of HDPA is 3%(w/w). |
Keywords: isobutane butene alkylation phosphotungstic acid hexadecylphosphate enhanced adsorption |
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XU Meng-Xia,WANG Yi-Bo,DENG Chang-Shun,DING Li-Ping,XU Yi-Da,XUE Nian-Hua,GUO Xue-Feng,PENG Lu-Ming,DING Wei-Ping.Isobutane/Butene Alkylation on Supported Phosphotungstic Acid Promoted by Hexadecylphosphate[J].Chinese Journal of Inorganic Chemistry,2019,35(8):1396-1402. |
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