Abstract: A temperature swing adsorption apparatuses and process is disclosed comprising passing a feed stream to a first adsorption bed to adsorb one or more contaminants from the feed stream to produce a product stream. A regeneration gas separator overhead stream is passed to a second adsorption bed to provide a second adsorption bed effluent stream. The second adsorption bed effluent stream is passed to a heater to generate a hot regeneration effluent stream. The hot regeneration effluent stream is passed to a third adsorption bed to regenerate the third adsorption bed and provide a regeneration effluent stream. At least a portion of the regeneration effluent stream is passed to a guard bed to remove sulfur and oxygen compounds to provide a treated regeneration effluent stream. The treated regeneration effluent stream is passed to a regeneration gas separator to provide the regeneration gas separator overhead stream.

Abstract: A temperature swing adsorption apparatuses and process is disclosed comprising passing a feed stream to a first adsorption bed to adsorb one or more contaminants from the feed stream to produce a product stream. A regeneration gas separator overhead stream is passed to a second adsorption bed to provide a second adsorption bed effluent stream. The second adsorption bed effluent stream is passed to a heater to generate a hot regeneration effluent stream. The hot regeneration effluent stream is passed to a third adsorption bed to regenerate the third adsorption bed and provide a regeneration effluent stream. At least a portion of the regeneration effluent stream is passed to a guard bed to remove sulfur and oxygen compounds to provide a treated regeneration effluent stream. The treated regeneration effluent stream is passed to a regeneration gas separator to provide the regeneration gas separator overhead stream.

Abstract: A process for reducing the size of sulfur removal units is presented. The process includes passing a regeneration gas from a regenerated contaminant adsorption unit through a fixed bed adsorber. The fixed bed adsorber adsorbs sulfur compounds above an equilibrium condition and releases adsorbed sulfur compounds below the equilibrium condition. The peak levels of sulfur in the regeneration gas are reduced and the processing of the regeneration gas reduces the size of sulfur removal units.

Abstract: A process for treating a gas stream, such as natural gas, comprising a process design that prevents the formation of undesired sulfur and sulfates from the reaction of oxygen and sulfur is disclosed. After water is removed from the gas stream, a portion of the dried gas stream is sent through a cooled adsorbent bed that has a first layer to remove sulfur compounds and then a layer to remove oxygen. There may be additional layers of adsorbent to remove other contaminants. The gas stream that is then heated to regenerate an adsorbent bed no longer contains sulfur and oxygen and undesirable reactions of sulfur and oxygen are avoided.

Abstract: A process for treating a gas stream, such as natural gas, comprising a process design that prevents the formation of undesired sulfur and sulfates from the reaction of oxygen and sulfur is disclosed. After water is removed from the gas stream, a portion of the dried gas stream is sent through a cooled adsorbent bed that has a first layer to remove sulfur compounds and then a layer to remove oxygen. There may be additional layers of adsorbent to remove other contaminants. The gas stream that is then heated to regenerate an adsorbent bed no longer contains sulfur and oxygen and undesirable reactions of sulfur and oxygen are avoided.

Abstract: A process for reducing the size of sulfur removal units is presented. The process includes passing a regeneration gas from a regenerated contaminant adsorption unit through a fixed bed adsorber. The fixed bed adsorber adsorbs sulfur compounds above an equilibrium condition and releases adsorbed sulfur compounds below the equilibrium condition. The peak levels of sulfur in the regeneration gas are reduced and the processing of the regeneration gas reduces the size of sulfur removal units.

Abstract: A temperature swing adsorption system includes a first adsorption bed configured to receive a feed stream and adsorb a contaminant from the feed stream to produce a product stream, a second adsorption bed configured to receive a portion of the product stream and a cooling stream to reduce a temperature of the second adsorption bed, a third adsorption bed configured to receive the heated product stream to increase a temperature of the third adsorption bed; a separation system to separate the cooled product stream into a first component stream and a second component stream, and a fourth adsorption bed configured to receive the first component stream and to enrich an adsorptive concentration of the first component stream. The enriched first component stream is directed to the second adsorption bed to provide the cooling stream.

Abstract: Systems and methods for gas separation are disclosed. In one exemplary embodiment, a method for gas separation includes the steps of contacting a feed gas stream that includes a product gas and an impurity gas with a liquid-phase absorption solvent and absorbing the impurity gas and a portion of the product gas of the feed gas stream into the liquid-phase absorption solvent. The exemplary method further includes the steps of subjecting the liquid-phase absorption solvent to a first reduced pressure environment to remove the portion of the product gas and a portion of the impurity gas from the liquid-phase absorption solvent and separating the portion of the product gas from the portion of the impurity gas.

Abstract: A temperature swing adsorption system includes a first adsorption bed configured to receive a feed stream and adsorb a contaminant from the feed stream to produce a product stream, a second adsorption bed configured to receive a portion of the product stream and a cooling stream to reduce a temperature of the second adsorption bed, a third adsorption bed configured to receive the heated product stream to increase a temperature of the third adsorption bed; a separation system to separate the cooled product stream into a first component stream and a second component stream, and a fourth adsorption bed configured to receive the first component stream and to enrich an adsorptive concentration of the first component stream. The enriched first component stream is directed to the second adsorption bed to provide the cooling stream.

Abstract: A gas purification process for treating a gas stream includes supplying the gas stream to at least one membrane unit to produce a permeate stream and a retentate stream. The retentate stream contains a lower concentration of at least one of water, hydrogen sulfide, or carbon dioxide as compared to the gas stream. The retentate stream is supplied to a molecular sieve unit to remove hydrogen sulfide to produce a treated gas product stream.

Abstract: A gas purification process for treating a gas stream includes supplying the gas stream to at least one membrane unit to produce a permeate stream and a retentate stream. The retentate stream contains a lower concentration of at least one of water, hydrogen sulfide, or carbon dioxide as compared to the gas stream. The retentate stream is supplied to a molecular sieve unit to remove hydrogen sulfide to produce a treated gas product stream.