▎ 摘　　要

NOVELTY - Removing carbon dioxide from biohydrogen alkane gas involves weighing trihexyl(tetradecyl)phosphonium trizolate as ionic liquid and anhydrous ethanol and then mechanically stirring at room temperature, adding graphene and then evaporating anhydrous ethanol, mechanically stirring at 80 degrees C and then heating at 80 degrees C, agitating for 1 hour and then placing in fixed-bed reactor, introducing biohydrogen alkane gas into the reactor and then performing absorption reaction, heating at 80-90 degrees C and regenerating. USE - The method is useful for removing carbon dioxide from biohydrogen alkane gas. ADVANTAGE - The method is capable of removing carbon dioxide from biohydrogen alkane gas with high specific surface area and excellent absorption effect in environmentally-friendly manner.