Polymeric ionic liquids(PILs)with high acid density:Tunable catalytic performance for biodiesel production  

作　　者：Xiaocheng Lin Youjie Huang Ling Li Changshen Ye Jie Chen Ting Qiu 

机构地区：[1]Engineering Research Center of Reaction Distillation,Fujian Province University,College of Chemical Engineering,Fuzhou University,Fuzhou 350116,China [2]College of Environment and Resources,Fuzhou University,Fuzhou 350116,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第10期266-275,共10页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China(21878054);Project on the Integration of Industry and Education of Fujian Province(2018Y4008);Science and Technology Project of Fujian Educational Committee(JAT190051);Fuzhou University Testing Fund of precious apparatus(2020T008);Research Initiation Funding of Fuzhou University(GXRC-19051);the Award Program for Minjiang Scholar Professorship。

摘　　要：A series of polymeric ionic liquids(PILs)used as effective heterogeneous catalysts for biodiesel production via esterification of free fatty acids(FFAs)were effectively prepared by the reaction of poly(ethylene imine)(PEI)polymers with different molecular weight and 1,3-propanesultone,followed by the further acidification with differential effective acids,i.e.H2SO4,CF3SO3H,CH3SO3H or p-toluenesulfonic acid(p-TSA).Ultrahigh acidity and catalytic performance were achieved and could be fine-tuned by simply adjusting the molecular weight of PEI and by further treatment of acids.Specifically,under the optimal conditions(i.e.reaction temperature was 70℃,reaction time was 2.0 h,catalyst dosage was 3.15%(mass),and alcohol/acid molar ratio was 14:1)acquired through the Box-BEHNKEN response surface methodology,a high oleic acid conversion of 98.42%could be obtained over the optimal PIL,PEI(70000)-PS-p-TSA.Additionally,our PILs also showed high generality for esterification of other FFAs,with general high conversion over 90%noted in each case even under much milder reaction conditions compared to other conventional catalysts.

关 键 词：CATALYST Ionic liquids BIODIESEL Poly(ethylene imine) ESTERIFICATION 

分 类 号：TE667[石油与天然气工程—油气加工工程] TQ426[化学工程]