PURPOSE: To make exhaust gas zero, recover combustible gases as much as possible and reduce the separation loss by removing incombustible carbon dioxide and moisture from methane-enriched mixed gas by the pressure-swing method under specific conditions.
CONSTITUTION: The mixed gas containing carbon dioxide and combustible components which flows out from the tower for adsorption and desorption at the initial stage is temporarily recovered in an aqueous gas holder. The recovered gas is adjusted in its flow, pressure and homogenized, and the temperature is raised. Then, the gas is fed into the tower in which adsorption process in the last cycle has been finished to effect overadsorption of carbon dioxide. The combustible components in the recovered gas are separated, recovered and recycled to the starting gas before treatment. The adsorbent is preferably carbon molecular sieves of about 3 average pore size.
URANO SHOJI
KINOSHITA NATSUO
OTA HIROSHI
KAWASAKI HARUJI
NISHINO CHIKASHI
MITSUBISHI PETROCHEM ENG
| JPS5045002A | 1975-04-22 | |||
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| JPH02699A | 1990-01-05 |
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