A system for processing a gas stream can include a physical solvent unit, an acid gas removal unit upstream or downstream of the physical solvent unit, and an LNG liquefaction unit downstream of the acid gas removal unit. The physical solvent unit is configured to receive a feed gas, remove at least a portion of any C.sub.5+ hydrocarbons in the feed gas stream using a physical solvent, and produce a cleaned gas stream comprising the feed gas stream with the portion of the C.sub.5+ hydrocarbons removed. The acid gas removal unit is configured to receive the cleaned gas stream, remove at least a portion of any acid gases present in the cleaned gas stream, and produce a treated gas stream. The LNG liquefaction unit is configured to receive the treated gas stream and liquefy at least a portion of the hydrocarbons in the treated gas stream.

Disclosed is a process for regenerating a hybrid solvent used to remove contaminants from a fluid stream and to provide an improved yield of purified fluid. Said process comprises at least one purification unit (12) and at least one regeneration unit (40) wherein condensed water (72) from the regeneration unit is combined with the regenerated lean hybrid solvent (55) prior to reuse in the purification unit and none of the condensed water is recycled into the regeneration unit.

Disclosed is a carbon dioxide absorbent and a carbon dioxide separation method using the same that greatly reduces energy consumption due to a small amount of latent heat required in regeneration of absorbents, enhances CO.sub.2 absorption rate, undergoes almost no thermal denaturation even at high temperatures while absorbing carbon dioxide, and results in a considerable reduction of the cost associated with absorption of carbon dioxide.

A composition for controlling ambient humidity within 55%-68%. The composition includes water and at least one of citrate, lactate and formate. The citrate includes at least one of sodium citrate, potassium citrate and calcium citrate. The lactate includes at least one of sodium lactate and potassium lactate. The formate includes at least one of sodium formate and potassium formate. The weight percentage of each of the citrate, the lactate and formate in the composition is 33.3%-84.2%. The total weight percentage of the citrate, the lactate and the formate in the composition is 33.3%-84.2%. The composition can control the ambient humidity within 55%-68% without the need to pre-adjust the objective space. The composition has large capacity of moisture absorption and desorption, and can quickly achieve the desired humidity in the objective environment.

A system for processing a gas stream can include a physical solvent unit, an acid gas removal unit upstream or downstream of the physical solvent unit, and an LNG liquefaction unit downstream of the acid gas removal unit. The physical solvent unit is configured to receive a feed gas, remove at least a portion of any C.sub.5+ hydrocarbons in the feed gas stream using a physical solvent, and produce a cleaned gas stream comprising the feed gas stream with the portion of the C.sub.5+ hydrocarbons removed. The acid gas removal unit is configured to receive the cleaned gas stream, remove at least a portion of any acid gases present in the cleaned gas stream, and produce a treated gas stream. The LNG liquefaction unit is configured to receive the treated gas stream and liquefy at least a portion of the hydrocarbons in the treated gas stream.

The invention pertains to processes for separating gases, acid gas, hydrocarbons, air gases, or combinations thereof. The processes may employ using a liquid phase cloud point with or without subsequent liquid-liquid separation. In some embodiments membranes can be employed with reverse osmosis to regenerate a solvent and/or an antisolvent. In some embodiments thermal switching phase changes may be employed during absorption or desorption to facilitate separation.

The invention pertains to processes for separating water from air. The processes may employ using an LCST solution with or without subsequent reverse osmosis, nanofiltration, or ultrafiltration.

The invention pertains to processes for separating gases, acid gas, hydrocarbons, air gases, or combinations thereof. The processes may employ using a liquid phase cloud point with or without subsequent liquid-liquid separation. In some embodiments membranes can be employed with reverse osmosis to regenerate a solvent and/or an antisolvent. In some embodiments thermal switching phase changes may be employed during absorption or desorption to facilitate separation.

A vapor/smoke capturing trap system featuring a smoke chamber trap for precipitating the smoke dispersed in the chamber. The chamber includes a bottom pool for containing a reservoir of a liquid solvent, and a gas filled portion in which a lower smog portion contains fog-sized droplets of the liquid solvent and into which the smoke is introduced, and an upper clear portion in which the concentration of the smoke and the droplets is decreased, respective of their concentration in the smog portion. A fog-condenser, disposed between the smog portion and the clear portion, precipitates the fog droplets of the smog portion into the pool. A fine mist generator streams a jet of fog-sized droplets of the liquid solvent mixed with smoke toward a concentration of the smoke at the smog portion. A closed loop gas circulator withdraws gas from the clear portion and recirculates the gas under pressure through the fine mist generator into the smog portion. Fresh smoke is introduced into the gas circulator via a smoke conveying conduit. A complementary smoke capturing method includes filling the reservoir, streaming the jet of fog-sized droplets toward a concentration of smoke dispersed within the lower smog portion of the gas filled portion, precipitating droplets, in the smog portion, into the pool by a fog-condenser disposed between the lower smog portion and the upper clear portion of the gas filled portion, recirculating under pressure, in a closed loop gas circulator, gas withdrawn from the clear portion into the smog portion through the fine mist generator, and conducting fresh smoke via smoke conveying conduit into the gas circulator.

A composition for controlling ambient humidity within 55%-68%. The composition includes water and at least one of citrate, lactate and formate. The citrate includes at least one of sodium citrate, potassium citrate and calcium citrate. The lactate includes at least one of sodium lactate and potassium lactate. The formate includes at least one of sodium formate and potassium formate. The weight percentage of each of the citrate, the lactate and formate in the composition is 33.3%-84.2%. The total weight percentage of the citrate, the lactate and the formate in the composition is 33.3%-84.2%. The composition can control the ambient humidity within 55%-68% without the need to pre-adjust the objective space. The composition has large capacity of moisture absorption and desorption, and can quickly achieve the desired humidity in the objective environment.