An alkanolamine gas treatment unit system that may comprise an absorber column, a regenerator column, and a once-through natural circulation vertical thermosyphon reboiler comprising a reboiler tube and a shell. The reboiler may be a steam driven one having a process side and a shell side, wherein the process side is inside the reboiler tube, the process side of the reboiler and the regenerator column are in fluid communication with one another, an inner surface of the reboiler tube, on the process side, has a surface roughness of 0.06 ?m or greater, the shell side of the reboiler is in fluid communication to a steam source, and the regenerator column and the absorber column are in fluid communication with one another. An absorbent regenerator system that may comprise the regenerator column and the once-through natural circulation vertical thermosyphon reboiler.

A system for carbon dioxide capture from a gas mixture comprises a lean solvent comprising 3-amino-1-propanol (AP), 2-dimethylamino-2-methyl-1-propanol (DMAMP), and water; an absorber containing at least a portion of the lean solvent, wherein the absorber is configured to receive the lean solvent and a gaseous stream comprising carbon dioxide, contact the lean solvent with the gaseous stream, and produce a rich solvent stream and a gaseous stream depleted in carbon dioxide; a stripper, wherein the stripper is configured to receive the rich solvent stream; a cross-exchanger fluidly coupled to a rich solvent outlet on the absorber and a rich solvent inlet on the stripper; a reboiler fluidly coupled to a lower portion of the stripper; and a condenser fluidly coupled to a vapor outlet of the stripper.

A composite material for gas capture, notably CO.sub.2 capture and storage. The composite material includes a mixture of a solid or liquid reactive filler and a gas permeable polymer such that the reactive filler forms micron-scale domains in the polymer matrix.

An acid component removal device for removing an acid component from an acid gas absorbent containing an amine, comprising: an anode; a cathode; and an electrodialysis structure having four compartments formed by arranging an first membrane which is either an anion exchange membrane or a cation exchange membrane, a second membrane which is a bipolar membrane, and a third membrane which is either an anion exchange membrane or a cation exchange membrane and which is the other of the first membrane, in this order, from the anode end to the cathode end between the anode and the cathode, with a space each between the membranes.

The present invention relates to methods for improving carbon capture using entrained catalytic-particles within an amine solvent. The particles are functionalized and appended with a CO.sub.2 hydration catalyst to enhance the kinetics of CO.sub.2 hydration and improve overall mass transfer of CO.sub.2 from an acid gas.

Absorption of one or more acid gases from a gas stream may take place using diglycolamine as an absorbent. Methods for processing the absorbent after acid gas absorption may comprise: obtaining an at least partially spent aqueous amine solution from an absorber tower; removing at least a portion of the one or more acid gases from the at least partially spent aqueous amine solution in a regeneration tower to form an at least partially regenerated aqueous amine solution comprising diglycolamine and bis-(2-hydroxyethoxyethyl)urea; and introducing at least a first portion of the at least partially regenerated aqueous amine solution to a reclaimer under thermal conditions effective to revert at least a majority of the bis-(2-hydroxyethoxyethyl) urea to diglycolamine. The reclaimer is heated with a steam input that is in indirect contact with the at least partially regenerated aqueous amine solution and cooled with at least a diglycolamine stream.

Provided are a method for capturing carbon dioxide including irradiating a reaction product (c) of an amine compound (a) and a gas (b) containing carbon dioxide with electromagnetic waves to desorb carbon dioxide from the reaction product (c); and a carbon dioxide capture system including a housing part for housing a reaction product (c) of an amine compound (a) and a gas (b) containing carbon dioxide and an electromagnetic wave irradiation part for irradiating the reaction product (c) with the electromagnetic waves.

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 C.sub.1 to C.sub.6 alkylene and ethers of formula R.sup.2OR.sup.3 wherein R.sup.2 and R.sup.3 are C.sub.1 to C.sub.3 alkylene.

The present invention provides a composite catalyst for diminishing energy demand during carbon dioxide absorbent regeneration and a method for producing the same.

The present invention more particularly relates to a composite catalyst in which the surface or inside of activated carbon activated carbon used as a porous carrier is modified with oxides of one or more metals selected from a transition metal group consisting of Fe, Ni, and Mo, and a method for producing the composite catalyst.

The activated carbon composite catalyst modified with a metal of the present invention is able to regenerate MEA (monoethanolamine) at a low temperature of 100? C. or below to diminish heat consumption, can decrease the heat duty by increasing the carbon dioxide desorption rate at a low temperature of 100? C. or below as well as acquire improved results through the relation between the BET surface area and the total acid sites, and can be usefully used as a technology capable of diminishing energy demand during energy-efficient CO.sub.2 absorbent regeneration at an economical cost since materials for production are inexpensive and abundant.

A composite material for gas capture, notably CO.sub.2 capture and storage. The composite material includes a mixture of a solid or liquid reactive filler and a gas-permeable polymer such that the reactive filler forms micron-scale domains in the polymer matrix.