公开(公告)号：US20240157308A1

公开(公告)日：2024-05-16

申请号：US18509312

申请日：2023-11-15

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： MinKee Choi ,  Chaehoon Kim

IPC: B01D71/02 ,  B01D67/00 ,  C01B32/186 ,  C01B32/198

CPC classification number: B01D71/0211 ,  B01D67/0088 ,  C01B32/186 ,  C01B32/198 ,  B01D2323/21819 ,  B01D2325/04 ,  C01P2006/16

Abstract: Disclosed are a microporous graphene oxide sheet, a method of manufacturing the same, a dispersion including the same, and a membrane including a stack of the microporous graphene oxide sheet, the microporous graphene oxide sheet having an average size of pores ranging from about 0.1 nm to about 2 nm, wherein a spacing between pores is about 0.3 nm to about 10 nm, a standard deviation for the spacing between pores is less than or equal to about 5 nm.

公开(公告)号：US11027256B2

公开(公告)日：2021-06-08

申请号：US16811155

申请日：2020-03-06

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Minkee Choi ,  Woosung Choi ,  Chaehoon Kim

IPC: B01J20/26 ,  B01J20/04 ,  B01J20/10 ,  B01J20/22 ,  B01J20/28 ,  B01J20/32 ,  B01D53/02 ,  B01D53/04

Abstract: A core-shell type amine-based carbon dioxide adsorbent is described, including a chelating agent resistant to oxygen and sulfur dioxide, to inhibit oxidative decomposition of amine. As a core, a porous support is employed on which an amine compound is immobilized, and, as a shell, an amine layer resistant to inactivity by sulfur dioxide is utilized. Such adsorbent exhibits high oxidation resistance because the chelating agent functions to remove a variety of transition metal impurities catalytically acting on amine oxidation. In addition, the sulfur dioxide-resistant amine layer of the shell selectively adsorbs sulfur dioxide to protect the amine compound of the core and, at the same time, the amine compound of the core selectively adsorbs only carbon dioxide. Sulfur dioxide adsorbed on the shell is readily desorbable therefrom at about 110° C. and thus remarkably improved regeneration stability is obtained during temperature-swing adsorption (TSA) processes in which sulfur dioxide is present.

公开(公告)号：US10654025B2

公开(公告)日：2020-05-19

申请号：US16191527

申请日：2018-11-15

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Minkee Choi ,  Woosung Choi ,  Chaehoon Kim

IPC: B01J20/22 ,  B01J20/32 ,  B01J20/04 ,  B01J20/10 ,  B01J20/26 ,  B01J20/28 ,  B01D53/02 ,  B01D53/04

Abstract: The core-shell type amine-based carbon dioxide adsorbent including a chelating agent resistant to oxygen and sulfur dioxide according to the present invention is an adsorbent which includes a chelating agent to inhibit oxidative decomposition of amine and has, as a core, a porous support on which an amine compound is immobilized and has, as a shell, an amine layer resistant to inactivity by sulfur dioxide, and a method of preparing the same. The amine-based carbon dioxide adsorbent including a chelating agent exhibits considerably high oxidation resistance because an added chelate compound functions to directly remove a variety of transition metal impurities catalytically acting on amine oxidation. In addition, the sulfur dioxide-resistant amine layer of the shell selectively adsorbs sulfur dioxide to protect the amine compound of the core and, at the same time, the amine compound of the core selectively adsorbs only carbon dioxide. In addition, sulfur dioxide adsorbed on the shell is readily desorbed therefrom at about 110° C. and thus remarkably improved regeneration stability is obtained during the temperature-swing adsorption (TSA) process containing sulfur dioxide.

公开(公告)号：US20190143299A1

公开(公告)日：2019-05-16

申请号：US16191527

申请日：2018-11-15

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Minkee Choi ,  Woosung Choi ,  Chaehoon Kim

IPC: B01J20/26 ,  B01J20/10 ,  B01J20/04 ,  B01J20/22 ,  B01J20/28 ,  B01J20/32 ,  B01D53/04

Abstract: The core-shell type amine-based carbon dioxide adsorbent including a chelating agent resistant to oxygen and sulfur dioxide according to the present invention is an adsorbent which includes a chelating agent to inhibit oxidative decomposition of amine and has, as a core, a porous support on which an amine compound is immobilized and has, as a shell, an amine layer resistant to inactivity by sulfur dioxide, and a method of preparing the same. The amine-based carbon dioxide adsorbent including a chelating agent exhibits considerably high oxidation resistance because an added chelate compound functions to directly remove a variety of transition metal impurities catalytically acting on amine oxidation. In addition, the sulfur dioxide-resistant amine layer of the shell selectively adsorbs sulfur dioxide to protect the amine compound of the core and, at the same time, the amine compound of the core selectively adsorbs only carbon dioxide. In addition, sulfur dioxide adsorbed on the shell is readily desorbed therefrom at about 110° C. and thus remarkably improved regeneration stability is obtained during the temperature-swing adsorption (TSA) process containing sulfur dioxide.