US 11,872,519 B2Granted

Carbon dioxide absorbent and method for separating out carbon dioxide by using same

AssigneesSogang University Research Foundation, University-Industry Cooperation Group of Kyung Hee University, Korea Carbon Capture & Sequestration R&D Center, Korea Institute of Energy Research

InventorsKwang Soon Lee, Hoon Sic Kim, Hui Yong Kim, Jung Hwan Kim, Sung June Hwang, Ja Yeop Kim, Shin Young Bae, Su Jin Na, Sang Do Park, Tae Sung Park, Yun Je Lee, Jong Kyun You

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Abstract

Disclosed is a carbon dioxide absorbent and a carbon dioxide separation method using the same that greatly reduces energy consumption due to a small amount of latent heat required in regeneration of absorbents, enhances CO2 absorption rate, undergoes almost no thermal denaturation even at high temperatures while absorbing carbon dioxide, and results in a considerable reduction of the cost associated with absorption of carbon dioxide.

Claims6

Dependent claims

A carbon dioxide absorbent comprising a triamine, an ether, and water,

wherein the triamine is selected from the group consisting of 2,2′-iminobis (N,N′-dimethylethylamine), N,N-bis[2-(methylamino)ethyl]methylamine, N,N-bis[3-(methylamino)propyl]methylamine, N,N′-(iminobisethylene)bismethanamine, and N,N′-(iminobispropylene)bismethanamine, and
wherein the ether is a tetraalkylene glycol dialkyl ether and selected from the group consisting of tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dipropyl ether, tetraethylene glycol dibutyl ether, tetrapropylene glycol dimethyl ether, tetrapropylene glycol diethyl ether, tetrapropylene glycol dipropyl ether, and tetrapropylene glycol dibutyl ether,
wherein the ether is contained in an amount of 20 to 40 wt. % with respect to the total weight of the absorbent,
wherein the water is comprised in an amount of 1.0 to 9.0 wt. % with respect to the total weight of the absorbent, and
wherein the triamine is contained in an amount of 50 to 90 wt. % with respect to the total weight of the absorbent.

2 more elements

Dependencies are inferred from the claim text.