Process to recover medium purity carbon dioxide

Details Process to recover medium purity carbon dioxide Process to recover medium purity carbon dioxide

B - Operations, Transporting

01

D

B01D 53/047 (2006.01) C10L 3/10 (2006.01)

Patent

CA 2647937

The present invention generally relates to vacuum pressure swing adsorption (VPSA) processes and apparatus to recover CO2 having a purity of approximately >=80 mole% from streams containing at least CO2 and H2 (e.g., syngas). The feed to the CO2 VPSA can be at super ambient pressure. The CO2 VPSA unit produces two streams, a H2-enriched stream and a CO2 product stream. The process cycle steps are selected such that there is minimal or no H2 losses from the process. The recovered CO2 can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).

De façon générale, la présente invention concerne des procédés et un dispositif d'adsorption avec régénération par variation de pression sous vide (VPSA) pour la récupération de CO2 d'une pureté >=80 % molaire environ à partir de flux contenant au moins du CO2 et H2 (tel que du gaz de synthèse). L'unité VPSA de CO2 produit deux flux: un flux enrichi en H2 et un flux de produit CO2. Les étapes du cycle de transformation sont sélectionnées de telle sorte que les pertes de H2 sont minimales ou nulles. Le dioxyde de carbone extrait peut être purifié davantage, séquestré ou utilisé dans des applications telles que la récupération assistée des hydrocarbures.

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