A carbon dioxide (CO.sub.2) chemical absorption system comprising: a CO.sub.2 absorption column for separating CO.sub.2 from combustion exhaust gas by absorbing the CO.sub.2 in the combustion exhaust gas with a CO.sub.2 absorbing liquid mainly composed of an aqueous alkanolamine solution; a regeneration column for regenerating the CO.sub.2 absorbing liquid by desorbing CO.sub.2 gas from the CO.sub.2 absorbing liquid that has absorbed CO.sub.2; a condenser for condensing water vapor entrained in the desorbed CO.sub.2 gas discharged from the top of the regeneration column, thereby obtaining reflux water; a pipe for returning all or part of the reflux water obtained by the condenser to the top of the regeneration column, and dispersing the reflux water in the regeneration column; a collection plate for collecting the reflux water dispersed in an upper portion of a packed bed in the regeneration column; a pipe for sending the regenerated CO.sub.2 absorbing liquid from the bottom of the regeneration column to the top of the absorption column; and a pipe for joining the reflux water collected by the collection plate into the pipe for sending the regenerated CO.sub.2 absorbing liquid.

The invention relates to a membrane separation process for energy-efficient generation of oxygen from fresh air. In the process, mixed conducting membranes in vacuum operation are used, the fresh air is discharged as waste air after separation of the oxygen, at least 85% of the thermal energy required for heating the fresh air is acquired by utilizing the waste heat of the waste air and/or of the obtained oxygen, the rest of the heating of the fresh air being realized through external energy supply, and a ratio of fresh air to generated oxygen in normal operation is adjusted to a range of from 6:1 to 25:1.

A method for integrating a carbon capture process with a process for cement production.

Disclosed in the present invention are a device system and method having sintering flue gas CO catalytic heat exchange and medium-and-low-temperature SCR denitration connected in series. In the device system, a CO catalytic heat storage and exchange device is arranged to completely replace an original heat exchanger arranged after a raw desulfurized flue gas pipe. The method comprises respectively carrying out first CO catalytic conversion and second CO catalytic conversion on sintering flue gas and denitrated flue gas by means of the CO catalytic heat storage and exchange device, thereby increasing CO conversion efficiency and reducing overall resistance of the system. In addition, the present invention takes both CO pollution control and carbon emission reduction into consideration and thus has good economic benefits and a good application prospect.

Ammonia-based photocatalytic reactor systems and methods are provided. Example features include coolant-circulation systems utilizing water and/or ammonia as a coolant for removing heat generated by LEDs comprising part of a photocatalytic reactor, a single compressor before the photoreactor inlet compressing ammonia gas anywhere from 1-113.4 Bar at Room temperature to 132.4 C, eliminating the need for second compressor and a choice for optimized reactor conversion, with temperature and pressure chosen to maintain the gas phase while appropriate for downstream separation, storing ammonia either from 33 C to room temperature and from atmospheric pressure to 113.4 bar, in order to eliminate either a need for one or both downstream compressors and-or a need for storing liquid ammonia at negative temperatures, thereby allowing room temperature storage, elimination of a compressor, condenser and two-phase separator, so that a product stream is provided substantially directly to an ammonia scrubber, thus producing ammonium hydroxide as by product to be use either in house or as a product to consumer, replacing a PSA system with a membrane H2 and N2 separator, eliminating a reactor downstream compressor, condenser, two-phase separator, and scrubber and replacing with two PSA systems, including a first one to separate ammonia as backflush and a second one to separate H2 and N2, including, in one example, a compressor between the first PSA system and the second PSA system, and a PDA reactor with combined membrane separation and substantially only a gas cooler and PSA system downstream from the PDA reactor, thereby eliminating a plurality of downstream components such as one or more compressors, condensers, separators, scrubbers, and/or dryers, for example.

A system, that includes a gas treating system having at least one of (i) an absorption-based system, having at least one absorber, and/or (ii) an adsorption-based system having at least one adsorber. The system further includes a combustion device, operatively coupled to the gas treating system, an Organic Rankine Cycle (ORC) operatively coupled to the combustion device and/or to the gas treating system, and a control module, wherein the control module is configured to cause energy to be diverted from one or more of combustion device exhaust flow, thermal fluid, stripped gas, compressed stripped gas, natural gas, compressed natural gas, ORC propellant, chilled thermal fluid, jacket water fluid, auxiliary cooling water, and/or turbine lube oil, through any of the gas treating system, the combustion device and/or the ORC to provide heat and/or cooling and/or power.

Processes and facilities for recovering and purifying a pyrolysis gas formed by pyrolyzing waste plastic are provided. An absorber-stripper system may be used to treat the pyrolysis gas for use in one or more downstream chemical recycling processes, which can be used in forming a variety of recycled content products.

Disclosed herein is a gas capture system comprising: a first reactor system arranged so that, in the first reactor system, at least some gas in a gas stream that is received by the gas capture system is captured by a sorbent that is arranged to flow through the first reactor system; a second reactor system arranged to regenerate the sorbent so that the sorbent releases at least some of the gas captured in the first reactor system, wherein the sorbent is arranged to flow through the second reactor system and the second reactor system is arranged to output a gas flow that comprises the released gas; a first sorbent transfer system arranged between a sorbent outlet of the first reactor system and a sorbent inlet of the second reactor system; a second sorbent transfer system arranged between a sorbent outlet of the second reactor system and a sorbent inlet of the first reactor system; and a heat pump system comprising a heat pump arranged to circulate a flow of working fluid, wherein the heat pump system is arranged to extract heat from the first reactor system and/or the gas flow output from the second reactor system; wherein: the sorbent is a liquid; the second reactor system comprises a pump arranged to reduce the pressure in the second reactor system so that the pressure in the second reactor system when regenerating sorbent may be lower than the pressure in the first reactor system during gas capture by the sorbent; and the first reactor system, first sorbent transfer system, second reactor system and second sorbent transfer system are all arranged so that they provide a sorbent flow path that recirculates the sorbent between the first reactor system and the second reactor system.

Compressor system provided with a compressor device with at least one compressor element with an outlet for compressed gas, an outlet line connected to this compressor device for the compressed gas, and a dryer connected to said outlet line of the type using a drying agent or desiccant for drying the compressed gas from the compressor system. The dryer is provided with a drying section and a regeneration section with an inlet and an outlet for a regeneration gas. A regeneration line is connected to the inlet of the regeneration section. The regeneration line includes a first heat exchanger for heating the regeneration gas. A secondary section of said first heat exchanger forms a condenser of a heat pump. An evaporator of the heat pump is provided in the compressor system.

A power plant system including a fossil fuel fired power plant (6) for the generation of electricity, a carbon dioxide capture and compression system (5, 13), and an external heat cycle system has at least one heat exchanger (1,2,3) for the heating of the flow medium of the external heat cycle system. The heat exchanger (1,2,3) is connected to a heat flow from the CO.sub.2 capture plant (5) or a CO.sub.2 compression unit (13). A return flow from the heat exchanger (1,2,3) is led to the CO.sub.2 capture and compression system (5,13) or to the power plant (6). The power plant system allows an increase in overall efficiency of the system.