METHOD AND FACILITY FOR PURIFYING A FEED GAS STREAM COMPRISING AT LEAST 90% CO2

A process for purifying a feed gas stream containing at least 90% of CO2, 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...

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Bibliographic Details
Main Authors RODRIGUES, Guillaume, PERRU, Laurent, FRANCO, Aurélien, ARPENTINIER, Philippe, LAGOUTTE, François, JABES, Rémi, WERLEN, Etienne
Format Patent
LanguageEnglish
Published 02.07.2020
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:A process for purifying a feed gas stream containing at least 90% of CO2, 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 CO2-enriched gas stream.
Bibliography:Application Number: US201816637978