公开(公告)号：US20220402762A1

公开(公告)日：2022-12-22

申请号：US17840628

申请日：2022-06-15

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： MinKee CHOI ,  Chaehoon KIM

IPC: C01B32/186 ,  C01B32/182

Abstract: Provided are a 2-dimensional microporous graphene and a method for preparing the same. The 2-dimensional microporous graphene has an average pore size of about 0.1 nm to about 2 nm, interpore spacing of about 0.3 nm to about 10 nm, and a standard deviation of the interpore spacing of less than or equal to about 5 nm.

公开(公告)号：US20200206719A1

公开(公告)日：2020-07-02

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 ,  B01D53/02 ,  B01J20/10 ,  B01D53/04 ,  B01J20/32 ,  B01J20/28 ,  B01J20/22 ,  B01J20/04

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.