The isomerization of n-pentane to generate high-quality blending components for clean gasoline was catalyzed by several amide-AlCl3-based ionic liquid(IL)analogs with various amides as donor molecules.The catalytic performance of these IL analogs was evaluated in a magnetic agitated autoclave operated in batch mode.IL analog based n-methylacetamide(NMA)-AlCl3 with the amide/AlCl3 molar ratio of 0.65 showed excellent performance toward n-pentane isomerization because 0.65NMA-1.0AlCl3 had a low viscosity and bidentate coordination structure.The influences of reaction time,reaction temperature,and stirring speed on the catalytic performance were also investigated.Optimal reaction conditions comprised the reaction time of 1 h,the reaction temperature of 40℃,and the stirring speed of 1500 r·min-1.Under optimal condition,the n-C5 conversion,research octane number(RON)increment,total liquids yield,and isoparaffin yield in isomerized oil were 56.80％,13.51,89.90 wt％,and 44.32 wt％,respectively.A new mathematical model was constructed to predict the relationships among RON increment,RON increment/n-C5 conversion ratio,and n-C5 conversion.The new model indicated that an appropriate conversion per pass of n-C5 did not exceed 50％-55％.Various cycloparaffin additives were used to improve the catalytic performance of 0.65NMA-1.0AlCl3.The n-C5 conversion increased from 56.80％to 67.32％.The RON increment,total liquids yield,and isoparaffin yield reached 17.83,97.36 wt％,and 63.74 wt％,respectively.