A dual acidic ionic liquid 3-sulfobutyl-1-(3-propyltriethoxysilane)imidazolium hydrogen sulfate was synthesized and immobilized on MCM-22 via covalent bonding, which was characterized by FT-IR, TGA, SEM, BET, XPS, and XRD. The modulating of adsorption capacity by novel immobilized ionic liquid was demonstrated by ethane and ethylene. The results indicate that after immobilization, the main structure of the MCM-22 remains unchanged and the acid amount increased. This material displays relatively superior adsorption ability in tuning the ratio of paraffin/olefin (the adsorbed ratio of ethane/ethylene increased over 30%). The immobilized ionic liquid is believed to tune the adsorption capacity resulting in these enhanced results. In addition, this concept could also be applicable to Friedel-Crafts alkylation, catalytic cracking reaction, adsorption separation, or other competitive adsorption reactions.