Method for the purification of a gas containing CO2 using an adsorption purification unit
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsBruno Alban, Christophe Claeys, Philippe Court, Arthur Darde, Guillaume De Smedt, Bao Ha, Vladimir Hasanov, Simon Jallais, Christian Monereau, Serge Moreau, Elise Renou, Ivan Sanchez-Molinero, Jean-Pierre Tranier
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Abstract
A method for the purification of a feed gas stream containing CO2 and water and at least one impurity chosen from NOx and SOx, comprising the incorporation of a purification step for the preferential elimination of water is provided.
Claims31
A method for the purification of a feed gas stream containing CO2, water and at least one impurity chosen from SOx and NOx, comprising the following steps:
- a) pretreating the feed gas stream, at least partially eliminating one of the impurities selected from the group consisting of nitrogen, oxygen, argon, the rare gases, SOx, CS2, H2S, NOx, HCN, HCl, CHCl3, HF, volatile organic compounds and the following metals:
- mercury, arsenic, selenium, cadmium, iron and nickel and compounds derived from these metals;
- b) compressing the preheated gas stream to a pressure of between 10 and 50 bar;
- c) recovering a purified CO2-rich gas stream, in the liquid, gaseous or supercritical state;
- wherein a purification step is carried out between steps a) and b) utilizing at least one bed of adsorbents that are neutral to NOx and/or SOx and having adsorption properties enabling water to be at least partially eliminated in the presence of NOx and/or SOx.
Dependencies are inferred from the claim text.