L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Laurent Perru

Etienne Werlen

Guillaume Rodrigues

Philippe Arpentinier

Fabrice Rivoal

François Lagoutte

Aurélien Franco

Rémi Jabes

Bruno Berthome

A process for purifying a feed gas stream containing at least 90% of CO, at least 20% RH and at least one impurity chosen from chlorinated, sulfur-bearing, nitrated or fluorinated compounds is provided. The process includes a) subjecting the feed gas stream to catalytic oxidation producing a stream containing at least one of HCl, NOx, SOx or hydrofluoric acid; b) maintaining the temperature of the gas stream above the highest value between the dew points of water and the acid(s) contained in the gas; c) removing at least a part of the acid impurities by bringing the gas stream into contact with a corrosion-resistant heat exchanger to condense the acid compounds while regulating the temperature of the gas stream exiting below the dew point of water; and d) separating the acid condensates with a corrosion-resistant separator in such a way as to produce a CO-enriched gas stream.

Method and facility for purifying a feed gas stream comprising at least 90% CO2

The invention relates to an apparatus for the distillation separation of a mixture containing, as the main components thereof, carbon dioxide and at least one other fluid selected from the group containing nitrogen, oxygen, argon, hydrogen, methane, carbon monoxide, said apparatus comprising a distillation column (), a condenser (), a reboiler (), means for conveying the mixture to be separated to the column or the condenser, means for conveying a head gas from the column to the condenser, and means for conveying a liquid condensed in the condenser into the head of the column. The condenser is formed by an exchanger with plates and blades made from brazed aluminum and having an exchange surface area per mof exchanger greater than 400 m/m, with ammonia being used as refrigerant.

Apparatus and method for the distillation separation of a mixture containing carbon dioxide

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Maurecourt, France

Laurent Perru