Method for treating a gas to reduce the carbon dioxide content thereof

摘要

The invention relates to a method for reducing the CO2 content of a gas by contacting the gaseous effluent to be treated with an absorbent that contains a CO2 trapping agent in the impregnated state on a substrate made of a solid composite material (M) containing a polymer (P) and a compound (C) selected from mineral oxides, silico-aluminates, and activated carbon, wherein said material (M) has an average particle size (D50) higher than or equal to 100 μm, and a pore space (Vd1) defined by pores having a diameter of between 3.6 and 1000 nm and which is at least 0.2 cm3/g. The invention also relates to specific absorbents used in said method.

主权项

1. A method for treating a gas containing CO2 for reducing CD2 content within said gas, the method comprising putting the gas to be treated into contact with an absorbent which comprises at least one CO2 capture agent, this CO2 capture agent being supported on a solid composite material (M) which comprises:
at least one polymer (P), and at least one compound (C) selected from mineral oxides, silico-aluminates and active coal, said material (M) having: a mean particle size D50 greater than or equal to 100 μm, a pore volume (Vd1), formed by the pores with a diameter comprised between 3.6 nm and 1,000 nm, of at least 2.0 cm3/g, wherein the CO2 capture agent is present in the absorbent in a content comprised between 5% and 75% by mass based on the total mass of the absorbent.