Patent ID: 6723756
Filing Date: 2004-04-20
Classification: B01D,C01B,C10G,Y02C,Y02P

Abstract:
A process comprising the following steps:(a) forming a syngas which contains CO2 in a syngas generator; (b) reacting the syngas in a syngas conversion process to form a product stream comprising hydrocarbonaceous products and a tail gas containing unreacted syngas and CO2; (c) separating the hydrocarbonaceous products from the unreacted syngas and CO2 in a separation zone; (d) contacting at least a portion of the unreacted syngas and CO2 with an aqueous medium having a pH above about 6.0 in a scrubbing zone to adsorb at least a portion of the CO2, and recovering a CO2-enriched aqueous stream and a syngas with reduced CO2 concentration; (e) forwarding at least part of the recovered syngas from step (d) to the syngas conversion reactor; and (f) desorbing at least part of the CO2 from the CO2-enriched aqueous stream obtained in step (d) and recovering a CO2-rich gas and CO2-depleted aqueous stream.