A carbon dioxide sorbent characterized in that carbon dioxide sorbing material incorporated in pores of the porous inorganic particles is sealed in the pores with a resin.

A method of generating electricity from an amine-based acid gas capture process using an electrolytic cell containing an anode and a cathode and an amine based electrolyte comprising: contacting a metal based redox material with an amine based electrolyte in the presence of an anode to form a metal-ammine complex in solution; adding an absorbed or absorbable acid gas to the metal-ammine complex containing electrolyte to form an acid gas absorbed electrolyte; and contacting the acid gas absorbed electrolyte with a cathode deposit, wherein the acid gas breaks up the metal-ammine complex in the metal-ammine complex containing electrolyte thereby generating a potential difference between the anode and the cathode.

A hybrid method for capturing CO.sub.2 from a gas mixture is provided, comprising a step of contacting the CO.sub.2 containing gas mixture with a slurry consisting of a liquid medium, imidazole or imidazole derivative(s), and a metal-organic framework material (MOFs). For the slurry system, the mass fraction of the imidazole or imidazole derivative(s) in it ranging from 2 to 50% and the mass fraction of the metal-organic framework material in it ranging from 5 to 25%. In the technical solution provided in the present invention, through combining absorptive separation by the liquid solution in which the imidazole or imidazole derivative(s) is dissolved, adsorption separation by the MOF material suspended in the solution, and selective permeation separation by a liquid medium film forms on the outside surface of the suspended MOFs, an absorption-adsorption hybrid separation effect for CO.sub.2 gas mixtures is efficiently achieved. In the CO.sub.2 capture method provided in the present invention, conventional absorption separation and adsorptive separation technologies are effectively combined, furthermore, the addition of imidazole or imidazole derivative(s) substantially increases both the CO.sub.2 capture ability and capture amount of the MOFs/liquid slurry, showing a great potential in industrial applications.

An absorbent mixture for the removal of acid gases from gas mixtures includes: A) at least one alcohol of general formula R(OH).sub.n, wherein R is an optionally substituted linear or branched alkyl or alkylaromatic group, with 2-20 carbon atoms and n is an integer that varies between 1-20; B) at least one organic base with a pK.sub.b (in water) less than or equal to 3; C) a solvent based on one or more heterocyclic compounds selected from cyclic ureas with a 5 or 6 atom ring of formula (IV) and/or (V); cyclic lactams with a 5 or 6 atom ring of formula (VI) and/or (VII); or combinations thereof:

##STR00001##

Where R1, R2, R3, R4 are independently selected from H, alkyl groups, linear or branched, with 1-10 carbon atoms;

##STR00002##

Where R1 and R3 are independently selected from H, alkyl, linear or branched groups with 1-10 carbon atoms.

An apparatus for collecting carbon dioxide from flue gas of a power plant. The apparatus includes an absorption tower, a sedimentation pool including slanting boards, a regeneration tower, a gas-liquid separator, a desiccator, a compressor, and a condenser. A rich solution is adapted to flow from a bottom of the absorption tower into the sedimentation pool for stratification. A gas outlet of the gas-liquid separator is in series connection with the desiccator, the compressor, the condenser, and a liquid carbon dioxide storage tank.

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

The invention relates to a process for dehumidifying a moist gas mixture in which the moist gas mixtures are brought into contact with an absorbent comprising dialkylimidazolium salts and trialkyl phosphate. In addition, the invention also relates to an absorption heat pump comprising the absorbent according to the invention and to the absorbent according to the invention itself.

The present invention relates to a process for producing hydrogen and for separating carbon dioxide from synthesis gas using a physical absorption medium. The process comprises the steps where the synthesis gas and the absorption medium are cooled; carbon dioxide is removed from the cooled synthesis gas via the cooled absorption medium in a physical absorption step at elevated pressure; laden absorption medium is treated in a plurality of flash stages, wherein co-absorbed carbon monoxide, hydrogen and carbon dioxide are separately removed from the laden absorption medium; hydrogen is separated from synthesis gas freed of carbon dioxide in a physical separation step, wherein hydrogen as product gas and an offgas comprising hydrogen, carbon monoxide and carbon dioxide are obtained; product gas hydrogen and carbon dioxide are discharged from the process. The invention further relates to a plant for performing the process.

A membrane contactor system for separating CO.sub.2 from a mixed gaseous feed stream comprising CO.sub.2, said contactor system comprising: (i) a composite membrane, said membrane having a permeate side and a retentate side; (ii) said retentate side being exposed to a mixed gaseous feed stream comprising carbon dioxide; (iii) said permeate side being exposed to a carbon dioxide capture organic solvent; (iv) said composite membrane comprising a porous layer and a non-porous selective polymer layer, said non-porous selective polymer layer selectively allowing transport of CO.sub.2 across the composite membrane from said mixed gaseous feed stream so that it dissolves in said capture solvent whilst limiting the transport of said capture solvent across the composite membrane.

A process for absorbing carbon dioxide from a gas stream containing carbon dioxide, including the steps of contacting the gas stream with an aqueous composition including a substituted heteroaromatic compound having a six-membered heteroaromatic ring with from 1 to 3 nitrogen atoms in the heteroaromatic ring and at least one substituent wherein at least one of the substituents is of formula R.sup.1NH.sub.2 wherein R.sup.1 is selected from C1 to C6 alkylene and ethers of formula R.sup.2OR.sup.3 wherein R.sub.2 and R.sub.3 are C.sub.1 to C.sub.3 alkylene