A method for separating gaseous carbon dioxide from a gas mixture having the following steps: (a) contacting the gas mixture with sorbent material to allow gaseous carbon dioxide to adsorb under ambient conditions, using a speed of the adsorption gas flow; (b0) isolating the sorbent with adsorbed carbon dioxide from said flow-through of gas mixture; (b1) injecting a stream of saturated steam at ambient conditions and inducing an increase of the temperature of the sorbent to a temperature between 60 and 110° C., (b2,b3) extracting at least the desorbed gaseous carbon dioxide while still injecting or circulating steam at ambient atmospheric pressure conditions into the unit; and (c) bringing the sorbent material to ambient atmospheric temperature conditions. The speed of steam flow through the unit in step (b1) or on average in steps (b1)-(b3) is in the range of 0.5-10 times the speed of the adsorption in step (a).

A gas pressurized separation system strips a product gas from a stream yielding a high pressure gaseous effluent containing the product gas such as may be used to capture CO.sub.2 from coal fired post combustion flue gas capture and to purify natural gas, syngas and EOR recycle gas. The system comprises a gas pressurized stripping column allowing flow of one or more raw streams in a first direction and allowing flow of one or more high pressure gas streams in a second direction, to strip the product gas into the high pressure gas stream and yield a high pressure gaseous effluent that contains the product gas. The process can further comprise a final separation process to further purify the product gas from the GPS column. For CO.sub.2 product, a preferred energy efficient final separation process, compound compression and refrigeration process, is also introduced.

A membrane including a polymer substrate having pore channels and a metal-organic framework disposed on the polymer substrate. Methods of producing the membrane are described. Methods of separating gases using the membrane are also provided.

The present invention relates to a gas-filtering system (1000, 3000, 4000, 5000, 6000) comprising: an input (1100) for the gas, a reactor (1301, 1302, 1303) for filtering the gas at the input (1100) and thus obtaining a filtered gas, an output (1200) for the filtered gas, a vacuum generator (1401, 1402) for generating a vacuum inside the reactor (1301, 1302, 1303), where the vacuum generator (1401, 1402) is configured so as to apply a first predetermined vacuum value (VI) in a first vacuum phase (T2) and so as to apply a second predetermined vacuum value (V2) in a second vacuum phase (T3); the filtering system (1000, 3000, 4000) further comprising a flow controller (1501, 1502, 1503) connected at the output to the reactor (1301, 1302, 1303), where the flow controller (1501, 1502, 1503) is configured so as to block the introduction of the filtered gas into the reactor (1301, 1302, 1303) during the first vacuum phase (T2), and where the flow controller (1501, 1502, 1503) is configured so as to allow the introduction of the filtered gas and/or a second gas into the reactor (1301, 1302, 1303), starting from the output (1200) during the second vacuum phase (T3).

A transfer line between the outlet of a steam cracker and the inlet for the quench system has metallic or ceramic inserts having a pore size from about 0.001 to about 0.5 microns inside the line forming a gas tight barrier with the inner surface of the line and having a vent for the resulting gas tight pocket are used to separate H.sub.2, CH.sub.4, CO and CO.sub.2 from cracked gases reducing the load on the down-stream separation train of the steam cracker.

The present invention relates to a device for the reversible adsorption of carbon dioxide from a gas mixture, comprising at least one adsorbent vessel comprising one or a plurality of gas permeable cartridge vessels of an inert and dimensionally stable material, and each cartridge comprising a suitable polymeric particular adsorbent having a primary amino functionality; to an arrangement including the device, and to a method for adand desorption of carbon dioxide.

An air composition adjusting device includes: an oxygen separator that separates oxygen from external air to be supplied to a target space; a gas supply path including a high concentration gas supply path for oxygen through which the oxygen separator communicates with the target space; and a controller that performs an oxygen concentration raising operation of supplying a high oxygen concentration gas, which has a higher oxygen concentration than external air before being treated by the oxygen separator, to the target space through the high concentration gas supply path for oxygen.

A methane destruction apparatus for capturing and converting fugitive methane gas emissions into carbon dioxide and water comprises a methane-capturing module for capturing the fugitive methane gas emissions and a methane conversion module for receiving captured methane from the methane-capturing module. The methane-capturing module includes a fugitive methane gas emission intake connected to an emissions line having a backpressure equal to 1 to 3 inches of water (249 to 746 Pa), a natural gas feed for feeding natural gas into the methane-capturing module, may include a relief vent for preventing overpressure within the methane-capturing module and a drain for draining liquids that have condensed within the methane-capturing module. The methane conversion module includes a conversion pad for catalytically converting the captured methane into carbon dioxide and water, a water vapour opening for outputting the water and a carbon dioxide opening for outputting the carbon dioxide.

Sweep-based gas separation processes for reducing carbon dioxide emissions from gas-fired power plants. The invention involves at least two compression steps, a combustion step, a carbon dioxide capture step, a power generate step, and a sweep-based membrane separation step. One of the compression steps is used to produce a low-pressure, low-temperature compressed stream that is sent for treatment in the carbon dioxide capture step, thereby avoiding the need to expend large amounts of energy to cool an otherwise hot compressed stream from a typical compressor that produces a high-pressure stream, usually at 20-30 bar or more.

The present disclosure relates to power plants. The teachings thereof may be embodied in power plants which extract and store carbon dioxide from flue gas generated in the power plant, and in methods for operating a power plant of this kind. For example, a method for operating a power plant may include: generating electrical energy from a combustion process, extracting carbon dioxide from a flue gas generated during the combustion process; storing the extracted carbon dioxide; acquiring current electricity price data; comparing the current electricity price data with an electricity price threshold; and if the electricity price falls below the electricity price threshold, operating an electrolysis device to convert stored carbon dioxide into other substances.