L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
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초록▼
A method for producing a CO2-enriched gas from a feed gas comprising carbon dioxide (CO2), at least one component selected from H2, N2, CH4, CO, O2 and argon, water vapor, optionally impurities such as NOx and/or SOx , and a solid-particle concentration of between 0.01 and 100 mg/m3, wherein the fee
A method for producing a CO2-enriched gas from a feed gas comprising carbon dioxide (CO2), at least one component selected from H2, N2, CH4, CO, O2 and argon, water vapor, optionally impurities such as NOx and/or SOx , and a solid-particle concentration of between 0.01 and 100 mg/m3, wherein the feed gas is at least partially dried upstream of a PSA unit in order to prevent the solid particles from caking in the PSA unit is provided.
대표청구항▼
1. A method for producing a CO2-enriched gas from a feed gas comprising 10 to 75 mol % carbon dioxide, water vapor, solid particles and at least one component selected from the group consisting of hydrogen, CO, methane, nitrogen, oxygen, and argon; said method employing a PSA unit, wherein the feed
1. A method for producing a CO2-enriched gas from a feed gas comprising 10 to 75 mol % carbon dioxide, water vapor, solid particles and at least one component selected from the group consisting of hydrogen, CO, methane, nitrogen, oxygen, and argon; said method employing a PSA unit, wherein the feed gas is at least partially dried upstream of the PSA unit, to obtain a relative humidity lower than 10%, and wherein said feed gas enters said PSA unit with a solid-particle concentration of between 0.01 and 100 mg/m3. 2. The method of claim 1, wherein the feed gas further contains at least one impurity from nitrogen oxides, and sulfur oxides. 3. The method of claim 2, wherein said nitrogen oxides are either nitric oxide or nitrogen dioxide. 4. The method of claim 2, wherein said sulfur oxides comprise sulfur dioxide. 5. The method of claim 1, wherein the solid-particle concentration of the feed gas entering said PSA unit is between 0.1 and 50 mg/m3. 6. The method of claim 5, wherein said solid-particle concentration of the feed gas entering said PSA unit is between 1 and 20 mg/m3. 7. The method of claim 1, wherein most of the solid particles have a particle size lower than 20 microns. 8. The method of claim 7, wherein most of the solid particles have a particle size lower than 5 microns. 9. The method of claim 1, wherein at least 10% of the particles contained in the gas to be treated have a particle size lower than 1 micron. 10. The method of claim 1, wherein the feed gas is at least partially dried to obtain a water content lower than 10 molar ppm. 11. The method of claim 10, wherein the feed gas is at least partially dried to obtain a water content lower than 1 molar ppm. 12. The method of claim 1, wherein the feed gas is dried by passage through a TSA adsorption unit. 13. The method of claim 12, wherein the TSA adsorption unit comprises one or more adsorbents selected from the group of a 3A molecular sieve, undoped activated alumina and silica gel. 14. The method of claim 1, wherein the dried feed gas is pressurized upstream of the PSA unit. 15. The method of claim 1, wherein the PSA unit has a first layer of adsorbent selected from the group consisting of activated aluminas, silica gels and activated carbon. 16. The method of claim 1, wherein the feed gas is pressurized before being dried. 17. The method of claim 1, wherein the feed gas is a waste gas from a fuel-fired electric power plant, a cement plant gas, a syngas or a gas produced by a steelmaking process.
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이 특허에 인용된 특허 (8)
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