This work demonstrated a novel catalytic transformation of gaseous olefins into jet fuel range isoparaffins by the low-temperature olefin polymerizations under atmospheric conditions. The production of the desired C-8-C-15 iso-paraffins with the selectivity of 80.6 C mol% was achieved by the room temperature polymerizations of gaseous light olefins using the [BMIM]Al2C17 ionic liquid. The influences of the reaction conditions on the olefinic polymerizations were investigated in detail. The properties of hydrocarbons in the synthetic fuels were determined by the GC-MS analyses combined with H-1 NMR, and C-13 NMR analyses. The formation of C-8-C-15 hydrocarbons from gaseous light olefins was illustrated by the identified products and the functional groups. This transformation potentially provides a useful avenue for the production of the most important components of iso-paraffins required in jet fuels. (C) 2016 Elsevier Ltd. All rights reserved.