Isomerization of Alkanes over Ionic Liquids Supported on SBA-15

摘要

Exploring the catalytic efficiency of ionic liquid supported on mesoporous material as heterogeneous organ catalysts for example, 1-Ethyl-3-methylimidazolium triflate and 1-ethyl-3-methylimidazolium chloride + AlCl_(3) (different ratio) immobilized on SBA-15 that contains 0.5% platinum, with regard to isomerization of in -pentane and in -hexane, along with commercial light naphtha feed conversion reactions. The prepared materials were characterized by several instrumental methods, which include temperature-programmed desorption to evaluate acid strength. The reactions were performed in a fixed-bed stainless steel reactor having high pressure by the down-flow method. This valuable novel isomerization reaction was strongly influenced by many key parameters, for instance, temperature, pressure, weight hourly space velocity, and flow rate of H_(2), which are discussed in detail. The Pt/EMIM-AlCl_(4)(1:1)20/SBA-15 ionic liquid catalyst showed superior catalytic performance out of the four-catalyst system examined toward the above reactions, which is undoubtedly due to its significant turnover frequencies values of 8.6 s~(–1) and 8.5 s~(–1) and specific reaction rates values of 8.01 × 10~(–4) mol g~(–1) s~(–1) and 8.00 × 10~(–4) mol g~(–1) s~(–1) for in -pentane and in -hexane correspondingly. The order of catalytic activity is Pt/EMIM-AlCl_(4)(1:1)20/SBA-15 Pt-EMIM-Tf/SBA-15 Pt/EMIM-Al_(2)Cl_(7)(1:2)20/SBA-15 Pt-EMIM-Al_(2)Cl_(7)(1:2)30/SBA-15.