Abstract: The present invention provides a process for capturing CO2 from a gas stream, the process at least comprising the steps of: (a) providing a CO2-containing gas stream; (b) contacting the gas stream as provided in step (a) in an adsorption zone with solid adsorbent particles thereby obtaining CO2-enriched solid adsorbent particles (c) passing CO2-enriched solid adsorbent particles as obtained in step (b) from the bottom of the adsorption zone to the bottom of a first desorption zone; (d) removing a part of the CO2 from the CO2-enriched solid adsorbent particles in the first desorption zone, thereby obtaining partly CO2-depleted solid adsorbent particles and a first CO2-enriched gas stream; (e) passing the partly CO2-depleted solid adsorbent particles as obtained in step (d) via a riser to a second desorption zone; (f) removing a further part of the CO2 from the partly CO2-depleted solid adsorbent particles in the second desorption zone thereby obtaining regenerated solid adsorbent particles and a second CO2-enr

Abstract: A process for removing sulfur dioxide from a feed gas stream, which comprises (i) contacting the feed gas stream with an aqueous lean absorbing medium comprising a chemical solvent comprising a regenerable absorbent, a physical solvent, and one or more heat stable salts. The regenerable absorbent is an amine. The ratio of the wt % of the physical solvent over that of the regenerable absorbent is 0.5 to 2.5. The ratio of the wt % of heat stable salts over that of the regenerable absorbent is 0.29 to 0.37. The pH of the lean absorbing medium is 6 or less. With the process SO2 can be selectively removed. When the absorbing medium is stripped, a reduced amount of energy is required as compared to known processes.

Abstract: A process for removing sulfur dioxide from a feed gas stream, which comprises (i) contacting the feed gas stream with an aqueous lean absorbing medium comprising a chemical solvent comprising a regenerable absorbent, a physical solvent, and one or more heat stable salts. The regenerable absorbent is an amine. The ratio of the wt % of the physical solvent over that of the regenerable absorbent is 0.5 to 2.5. The ratio of the wt % of heat stable salts over that of the regenerable absorbent is 0.29 to 0.37. The pH of the lean absorbing medium is 6 or less. With the process SO2 can be selectively removed. When the absorbing medium is stripped, a reduced amount of energy is required as compared to known processes.

Abstract: A process for the recovery of an amine acid gas absorbent used in an acid gas recovery unit, comprising obtaining an amine-containing waste stream from a heat stable salt (HSS) removal unit wherein a HSS containing amine acid gas absorbent stream is contacted with a base and subjected to a first phase separation step whereby a light regenerated amine absorbent stream and the amine-containing waste stream are produced; contacting the amine-containing waste stream with an organic solvent and obtaining an amine rich organic solvent stream and an amine reduced waste stream; and contacting the amine rich organic solvent stream with an acid and obtaining a protonated amine stream and an amine reduced organic solvent stream.

Abstract: A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the concentration of heat stable salts in the feed stream provided to the cation exchange unit is limited.

Abstract: A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the cation exchange resin is regenerated using sulfurous acid reflux.

Abstract: A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the cation exchange resin is regenerated using sulfurous acid reflux.

Abstract: A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the concentration of heat stable salts in the feed stream provided to the cation exchange unit is limited.