A method and system of depressurizing a molecular sieve used in ethanol production is shown and described. The method and system utilizes a vapor mixing condenser that receives a vapor sieve feed from the molecular sieve during the depressurization cycle. The vapor from the molecular sieve during the pressurization cycle is used to heat the 190-proof product flow. The heated product flow is diverted directly to the 190-proof product vaporizer, which increases the input product flow temperature to the vaporizer, thereby reducing the amount of heat needed to vaporize the 190-proof product flow. The reduction in heat needed reduces energy costs and increases equipment life.

An oxygen adsorbent which can be manufactured at a low cost, and an oxygen manufacturing equipment and an oxygen manufacturing method which are capable of producing oxygen-enriched gas at a low cost by using the oxygen adsorbent are provided. The oxygen adsorbent comprises at least an oxide of a perovskite structure. The oxide is represented by a compositional formula of Sr.sub.1xCa.sub.xFeO.sub.3, wherein 0.12x0.40, 00.5 Since this oxide does not include La and Co included in a conventional oxygen adsorbent, it can be manufactured at a low cost.

An adsorption-desorption material, in particular, crosslinked organo-amine polymeric materials having a weight average molecular weight of from about 500 to about 110.sup.6, a total pore volume of from about 0.2 cubic centimeters per gram (cc/g) to about 2.0 cc/g, and an adsorption capacity of at least about 0.2 millimoles of CO.sub.2 adsorbed per gram of adsorption-desorption material, and linear organo-amine polymeric materials having a weight average molecular weight of from about 160 to about 110.sup.6, a total pore volume of from about 0.2 cubic centimeters per gram (cc/g) to about 2.0 cc/g, and an adsorption capacity of at least about 0.2 millimoles of CO.sub.2 adsorbed per gram of adsorption-desorption material. This disclosure also relates in part to processes for preparing the crosslinked organo-amine materials and linear organo-amine materials. This disclosure further relates in part to the selective removal of CO.sub.2 and/or other acid gases from a gaseous stream containing one or more of these gases using the adsorption-desorption materials.

In some embodiments, the present disclosure pertains to materials for use in CO.sub.2 capture in high pressure environments. In some embodiments, the materials include a porous carbon material containing a plurality of pores for use in a high pressure environment. Additional embodiments pertain to methods of utilizing the materials of the present disclosure to capture CO.sub.2 from various environments. In some embodiments, the materials of the present disclosure selectively capture CO.sub.2 over hydrocarbon species in the environment.

Disclosed is an improved process for recovering condensable components from a gas stream, in particular, heavier hydrocarbons from a gas stream. The present process uses solid adsorbent media to remove said heavier hydrocarbons wherein the adsorbent media is regenerated in a continuous fashion in a continuous adsorbent media co-current regeneration system using a stripping gas to provide a regenerated adsorbent media and a product gas comprising heavier hydrocarbons from a loaded adsorbent media.

A method of treating a sorbent having a species sorbed thereto includes reacting a first reactant and a second reactant to generate heat, and heating the sorbent with the generated heat to desorb the sorbed species form the sorbent. The first reactant includes a molecule having the same chemical identity as the sorbed species. Systems for carrying out such methods are provided.

An adsorption-desorption material, in particular, crosslinked organo-amine polymeric materials having a weight average molecular weight of from about 500 to about 110.sup.6, a total pore volume of from about 0.2 cubic centimeters per gram (cc/g) to about 2.0 cc/g, and an adsorption capacity of at least about 0.2 millimoles of CO.sub.2 adsorbed per gram of adsorption-desorption material, and linear organo-amine polymeric materials having a weight average molecular weight of from about 160 to about 110.sup.6, a total pore volume of from about 0.2 cubic centimeters per gram (cc/g) to about 2.0 cc/g, and an adsorption capacity of at least about 0.2 millimoles of CO.sub.2 adsorbed per gram of adsorption-desorption material. This disclosure also relates in part to processes for preparing the crosslinked organo-amine materials and linear organo-amine materials. This disclosure further relates in part to the selective removal of CO.sub.2 and/or other acid gases from a gaseous stream containing one or more of these gases using the adsorption-desorption materials.

An adsorption-desorption material, in particular, crosslinked organo-amine polymeric materials having a weight average molecular weight of from about 500 to about 110.sup.6, a total pore volume of from about 0.2 cubic centimeters per gram (cc/g) to about 2.0 cc/g, and an adsorption capacity of at least about 0.2 millimoles of CO.sub.2 adsorbed per gram of adsorption-desorption material, and linear organo-amine polymeric materials having a weight average molecular weight of from about 160 to about 110.sup.6, a total pore volume of from about 0.2 cubic centimeters per gram (cc/g) to about 2.0 cc/g, and an adsorption capacity of at least about 0.2 millimoles of CO.sub.2 adsorbed per gram of adsorption-desorption material. This disclosure also relates in part to processes for preparing the crosslinked organo-amine materials and linear organo-amine materials. This disclosure further relates in part to the selective removal of CO.sub.2 and/or other acid gases from a gaseous stream containing one or more of these gases using the adsorption-desorption materials.

A control apparatus for controlling a gas purification apparatus includes a circuit configured to control to depressurize a pressure inside a compressor configured to compress a gas. The gas purification apparatus includes the compressor, a first adsorption part configured to include a first adsorbent which adsorbs impurities mixed in the gas, a second adsorption part configured to include a second adsorbent which adsorbs the impurities, and a valve provided on a pipe connecting the compressor, the first adsorption part, and the second adsorption part. The circuit is further configured to control the valve so that the second adsorbent adsorbs the impurities desorbed from the first adsorbent in a case that a pressure inside the compressor is depressurized, to regenerate the first adsorption part.

The present invention relates to a method for reducing the amount of one or more of a residue, such as a fat residue or oil residue, entrapped in a spent sorbent. The present invention further pertains to the sorbent obtained by the present method.