METHOD FOR ABSORBING METHANE GAS USING NATURAL ZEOLITE

摘要

PURPOSE: A method for absorbing methane gas by pressing a methane gas-containing gas mixture to natural zeolite is provided which can absorb about 1.5 to 2 times as much methane gas as conventional artificial zeolite and activated carbon. CONSTITUTION: A method comprises (a) acid treating natural zeolite to be an Si/Al ratio of above 6 and (b) pressing a methane gas-containing mixture gas within the range of 3 to 50 kg/cm¬2 to the acid treated zeolite. The natural zeolite is produced in the east coastal area in Korea and a crystalline compound contains mordenite, clinoptilolite and heulandite. The mixture gas contains methane gas with argon gas or hydrogen gas.