A method for producing a high-purity hydrogen chloride gas comprises performing a purification process that includes the steps 1) to 3) below on a byproduct hydrogen chloride gas: 1) a crude hydrochloric acid generation step of allowing water to absorb the byproduct hydrogen chloride gas; 2) a volatile organic impurity-removed hydrochloric acid generation step of bringing the crude hydrochloric acid obtained in the step 1) into contact with an inert gas at a liquid temperature of 20 to 45° C. to dissipate volatile organic impurities; and 3) a high-purity hydrogen chloride gas generation step of supplying the volatile organic impurity-removed hydrochloric acid obtained in the step 2) to a distillation column and performing distillation under conditions of a column bottom temperature of higher than 60° C. and 108° C. or lower and a column top temperature of 60° C. or lower to distill out a high-purity hydrogen chloride gas.

Provided is a boiler plant including a carbon dioxide capture system. The carbon dioxide capture system has an absorbing-liquid regeneration device and an absorber. The absorbing-liquid regeneration device includes a regenerator, a first circulation line in which the absorbing liquid is taken out from the regenerator and is returned to the regenerator, and a second circulation line in which the absorbing liquid is taken out from the regenerator and is returned to the regenerator, a heat exchanger, a heater, and a switcher. The heat exchanger heats the absorbing liquid by exchanging heat between the absorbing liquid flowing through the first circulation line and steam from the boiler. The heater heats the absorbing liquid flowing in the second circulation line. The switcher switches between a first heating state in which the absorbing liquid flows in the first circulation line and a second heating state in which the absorbing liquid flows in the second circulation line.

The disclosure provides an apparatus, as well as associated systems and methods for removing acid gas components from gas streams. The disclosure provides a rotating packed bed (RPB)-based absorber with a non-aqueous liquid solvent contained therein for treatment of the gas streams, wherein the non-aqueous liquid solvent captures acid components from the gas stream. Various advantages, e.g., with respect to spatial considerations and associated expenses can be realized using the apparatus, systems, and methods described herein.

The present disclosure relates to an apparatus for trapping a reaction by-product created by an etching process, the apparatus being configured to trap a reaction by-product contained in an unreacted gas discharged after a process is performed in an etching process chamber during a semiconductor manufacturing process, trap and stack the reaction by-product in the form of powder at a position between a vacuum pump and a scrubber through multiple flow path switching structures, multiple trapping structures, and multiple stacking structures, and discharge only a gaseous unreacted gas to the scrubber.

Described and represented is a glycol drying system with at least one wet glycol collection container and/or at least one glycol collection line to collect moist glycol, with at least one heating device to heat the moist glycol in the at least one wet glycol collection container and/or in the at least one glycol collection line and with a membrane separation system to separate the water from the heated, moist glycol. In order to reduce the operating costs, without having to accept disproportionate investment costs, it is provided that at least one flash gas vent is provided to remove flash gas driven out when the moist glycol is heated before separating the water in the membrane separation system and in that at least one combustion chamber is provided to combust the flash gas and to provide heat for the heating device.

A method for recovering sulfur within a gas processing system is described herein. The method includes contacting a natural gas stream including an acid gas with a solvent stream within a co-current contacting system to produce a sweetened natural gas stream and a rich solvent stream including an absorbed acid gas. The method also includes removing the absorbed acid gas from the rich solvent stream within a regenerator to produce a concentrated acid gas stream and a lean solvent stream. The method further includes recovering elemental sulfur from hydrogen sulfide (H.sub.2S) within the concentrated acid gas stream via a sulfur recovery unit.

This process comprises quenching and washing with water a gas stream derived from pyrolysis, and separating an aqueous phase from a washed gas stream; compressing, then cooling a washed gas stream; washing the compressed gas stream under pressure; passing the washed gas stream through at least one acid removal unit; drying the acid-depleted gas stream; passing the dry gas stream through at least one impurity removal unit; and feeding the purified gas stream into a cryogenic absorption unit and supplying the cryogenic absorption unit with a hydrocarbon cryogenic solvent to obtain a light gas residue, and a fraction of C.sub.2.sup.+ hydrocarbons.

Proposed is a powder removing apparatus using a screw cylinder for a gas processing facility, in which the powder removing apparatus has a structure in which a scraper is coupled to the screw cylinder that allows a piston rod to be moved forward while being rotated in one direction and to be moved backward while being rotated in a reverse direction according to a supply direction of fluid, thereby allowing the powder adhered to an inner circumferential surface of a pipeline of the gas processing facility or an inner wall surface of the gas processing facility to be easily and efficiently removed. According to an embodiment of the present disclosure, the powder removing apparatus includes the screw cylinder and a scraper.

A system for separating carbon dioxide from a carrier gas includes a CO.sub.2 enrichment subsystem that receives a carrier gas stream and produces an enriched carbon dioxide fluid stream. The system also includes a CO.sub.2 polishing subsystem in fluid communication with the CO.sub.2 enrichment subsystem that produces a carbon dioxide rich fluid stream. In a corresponding method, a carrier gas is received in a CO.sub.2 enrichment subsystem and an enriched carbon dioxide fluid stream is produced. The enriched carbon dioxide fluid stream is directed to a CO.sub.2 polishing subsystem wherein a stream further enriched in carbon dioxide is produced.

The present invention addresses to a method that uses surface-active surfactants ionic liquids (ILs) with an affinity for water to capture CO.sub.2, especially ILs derived from surfactants, of low production cost, fluoride-free, causing a low environmental impact in its use and high yield of CO.sub.2 sorption. The CO.sub.2 sorption method consists of contacting a gas mixture with at least one of the described ILs, at the working temperature, pressure and partial pressure of CO.sub.2. The removal of CO.sub.2 is done by pressure reduction. ILs can be reused without loss of efficiency.