Method for collecting carbon dioxide contained in flue gas that is produced by coal thermal power plant utilized for producing electricity, involves separating hydrates from slurry of carbon dioxide hydrates at specific temperature

摘要

The method involves contacting a gas effluent (104) with a liquid mixture (115) of non-miscible liquid phases at first temperature and first pressure (P1) to produce slurry of carbon dioxide hydrates (105-108). Hydrates are separated from the slurry at second temperature and second pressure to release enriched carbon dioxide effluents (109-111) and second liquid mixtures (112-114) of the phases, where the second temperature is maintained by using the heat generated by very low vapor pressure water (118) in a combustion unit. The second temperature amounts to less than or equal to 0.1 bar. Independent claims are also included for the following: (1) an installation for collecting carbon dioxide contained in a gas effluent produced by a combustion unit (2) a coal thermal power plant.