Method and equipment for treating CO2-rich smoke

US9067173B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Bruno Alban · Houston, US
• Philippe Arpentinier · Paris, FR
• Alain Briglia · Corzé, FR
• Serge Moreau · Vélizy-Villacoublay, FR
• Fabrice Del Corso · Houston, US
• Benoit Davidian · Saint-Maur-des-Fossés, FR

Key dates

• Filing date: Feb 25, 2011
• Grant date: Jun 30, 2015
• Expiry date: Jan 30, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a method for treating a gas stream comprising combustion fumes containing CO2 in an initial proportion, water vapor, one or more volatile acid compounds, and one or more additional impurities selected from among oxygen, nitrogen and argon, comprising the steps of: i) compressing the gas stream to a final pressure of 1 bar to 74 bar absolute; ii) cooling the gas stream to a temperature of around −10° C. to around −130° C. and eliminating at least one additional impurity; and iii) recovering a CO2-enriched gas stream containing a final proportion of CO2 greater than the initial proportion of CO2 in the stream to be treated. In addition, the method comprises, prior to step i), a step of pre-drying the stream for removing therefrom at least a portion of the water vapor which it contains.