PROCESS FOR CONVERTING A CO AND CO2 FEED GAS STREAM TO LIQUID PRODUCTS BY FERMENTATION

摘要

A process converts a gas input stream comprising CO, C02, and H2 by contact with fermentation liquid into a liquid product that controls the concentration of CO and C02 in the fermentation vessel. The process charges the feed gas stream and a recycle gas stream to the fermentation vessel and an off-gas stream collects above the fermentation liquid. The off-gas stream flows to a gas injector that uses a recycle liquid as the motive fluid to mix the off-gas with the recycle liquid into a gas-liquid dispersion. Contact of the recycle liquid with the off-gas absorbs C02 to provide the recycle stream. A gas separation vessel separates the remainder of the off-gas into the recycle gas. Mixing the recycle gas with the gas input stream dilutes the concentration of CO to lower the CO concentration in the fermentation vessel. Separated recycle liquid flows to a C02 stripper for removal of C02.