Invention Grant
- Patent Title: Amine-based carbon dioxide adsorbent resistant to oxygen and sulfur dioxide and method of preparing the same
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Application No.: US16191527Application Date: 2018-11-15
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Publication No.: US10654025B2Publication Date: 2020-05-19
- Inventor: Minkee Choi , Woosung Choi , Chaehoon Kim
- Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
- Applicant Address: KR Daejeon
- Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
- Current Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
- Current Assignee Address: KR Daejeon
- Agency: Hultquist, PLLC
- Agent Steven J. Hultquist
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@1e105551 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2a851073
- Main IPC: B01J20/22
- 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.
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