US 8,506,840 B2 · Composition having ring structure and terminal amine groups, and use thereof as flue gas absorbent

Abstract

Disclosed is a flue gas absorbent composition which contains a compound and water. The compound has a ring structure and includes terminal primary amine groups and substituted α-carbon atoms neighboring the amine groups. Further, a use of a solution of a compound having a ring structure and terminal amine groups as a flue gas absorbent is disclosed. The absorbent composition includes a ring-structure compound having superior absorption ability when compared to conventional absorbents, thereby exhibiting excellent properties, i.e., flue gas absorption rate improved by 50 to 100% and flue gas absorption capacity improved by 200 to 400%, as compared with currently used absorbents such as monoethanolamine (MEA) and 2-amino-2-methyl-propanol (AMP).

Claims6

Dependent claims

A method for treating a flue gas, the method comprising:

providing a vessel containing an aqueous composition consisting essentially of water and a compound having an alicyclic structure with terminal primary amine groups, wherein the alicyclic structure has 5-20 carbon atoms, wherein five or six of the carbon atoms define a ring structure of the alicyclic structure;
introducing the flue gas into the vessel, wherein the flue gas comprises carbon dioxide, sulfur dioxide, and nitrogen dioxide;
reacting the carbon dioxide of the flue gas with the amine groups of the compound of a first portion of the aqueous composition to form carbamate;
and
hydrolyzing the carbamate to form bicarbonate.

2 more elements

Dependencies are inferred from the claim text.

Composition having ring structure and terminal amine groups, and use thereof as flue gas absorbent

Life of this patent

Composition having ring structure and terminal amine groups, and use thereof as flue gas absorbent

Life of this patent

Abstract

Claims6