公开(公告)号：US12017202B2

公开(公告)日：2024-06-25

申请号：US17533693

申请日：2021-11-23

Applicant: Korea University Research and Business Foundation

Inventor： Jungkyu Choi ,  Kwan-Young Lee ,  Jinseong Kim ,  Eunhee Jang ,  Layoung Choi

IPC: B01J20/18 ,  B01D53/02 ,  B01J20/28 ,  B01J20/30

CPC classification number: B01J20/186 ,  B01D53/02 ,  B01J20/28016 ,  B01J20/28085 ,  B01J20/3057 ,  B01J20/3078 ,  B01D2253/1085 ,  B01D2253/304 ,  B01J2220/42

Abstract: Disclosed are a hydrocarbon adsorption and desorption complex that reduces emission of hydrocarbon from vehicle exhaust gas and improves hydrothermal stability of a device, and a method for preparing the same. The hydrocarbon adsorption and desorption complex may have improved adsorption ability of the hydrocarbon as metal ions are bound to a gas adsorbing portion containing aluminum, and may have improved hydrothermal stability as a reinforcing portion made of silica is formed on a surface of the gas adsorbing portion.

公开(公告)号：US11596905B2

公开(公告)日：2023-03-07

申请号：US17901191

申请日：2022-09-01

Applicant: Korea University Research and Business Foundation

Inventor： Jungkyu Choi ,  Kwan Young Lee ,  Yang-Hwan Jeong

IPC: B01D53/22 ,  B01D71/02 ,  B01D67/00 ,  B01D69/10 ,  B01D69/12

Abstract: Disclosed are a heterogeneous zeolite membrane and a method of preparing the same, and more particularly a heterogeneous zeolite membrane that has CHA and DDR zeolite structures by growing seed particles into a crystal structure different from that of the zeolite membrane and can thus separate CO2/N2 and CO2/CH4 even under wet conditions, a method of preparing the same, and a method of capturing and removing carbon dioxide using the membrane.

公开(公告)号：US11465102B2

公开(公告)日：2022-10-11

申请号：US16822211

申请日：2020-03-18

Applicant: Korea University Research and Business Foundation

Inventor： Jungkyu Choi ,  Kwan Young Lee ,  Yang-Hwan Jeong

IPC: B01D53/22 ,  B01D71/02 ,  B01D67/00 ,  B01D69/10 ,  B01D69/12

Abstract: Disclosed are a heterogeneous zeolite membrane and a method of preparing the same, and more particularly a heterogeneous zeolite membrane that has CHA and DDR zeolite structures by growing seed particles into a crystal structure different from that of the zeolite membrane and can thus separate CO2/N2 and CO2/CH4 even under wet conditions, a method of preparing the same, and a method of capturing and removing carbon dioxide using the membrane.

公开(公告)号：US10981797B2

公开(公告)日：2021-04-20

申请号：US16993479

申请日：2020-08-14

Applicant: Korea University Research and Business Foundation

Inventor： Jungkyu Choi ,  Kwan Young Lee ,  Eun-Hee Jang

IPC: C01B39/48 ,  B01J29/70 ,  C01B39/02 ,  B01J35/00 ,  B01J37/04 ,  B01J20/18 ,  B01J20/30 ,  C01B3/56 ,  B01J37/08 ,  C01B3/58

Abstract: Disclosed are a method of preparing a zeolite nanosheet and a zeolite nanosheet particle prepared thereby, and more particularly a method of preparing a zeolite nanosheet capable of preparing a monolayer zeolite nanosheet through a simple process of mixing a multilayer zeolite precursor with a swelling agent to swell the multilayer zeolite precursor and drying and calcining the multilayer zeolite precursor, wherein the monolayer zeolite nanosheet is useful to separate a catalyst or gas, and a zeolite nanosheet particle prepared thereby.

公开(公告)号：US12036516B2

公开(公告)日：2024-07-16

申请号：US17148699

申请日：2021-01-14

Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Jungkyu Choi ,  Kwan Young Lee ,  Sung-Won Hong

IPC: B01D71/02 ,  B01D67/00 ,  B01D69/10 ,  C07B63/00 ,  C07C7/14 ,  C07C7/144 ,  C07C15/08

CPC classification number: B01D71/0281 ,  B01D67/00411 ,  B01D69/107 ,  B01D69/108 ,  C07B63/00 ,  C07C7/144 ,  B01D2323/081 ,  B01D2323/2181 ,  C07C15/08

Abstract: The present invention relates to a method of controlling a defect structure in an MFI zeolite membrane and a method of separating xylene isomers using the MFI zeolite membrane produced by the method, and more particularly, to a method of controlling a defect structure in an MFI zeolite membrane that improves the performance of separating a xylene isomer by reducing the amount and size of defects formed in the MFI membrane structure when removing organic-structure-directing agents in the membrane through calcination at a low temperature using ozone.

公开(公告)号：US11666887B2

公开(公告)日：2023-06-06

申请号：US17360418

申请日：2021-06-28

Applicant: HYUNDAI MOTOR COMPANY ,  KIA CORPORATION ,  KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Chun Yong Kang ,  Chang Hwan Kim ,  Jungkyu Choi ,  Eun-Hee Jang ,  Jin Seong Kim ,  Hwiyoon Noh ,  La Young Choi

IPC: B01J20/18 ,  B01J20/02 ,  B01J20/28 ,  B01J20/32 ,  B01J20/30

CPC classification number: B01J20/186 ,  B01J20/0207 ,  B01J20/28011 ,  B01J20/28016 ,  B01J20/28083 ,  B01J20/3078 ,  B01J20/3293 ,  B01J2220/42

Abstract: A hydrocarbon adsorbent includes a core-shell particle including a core and a shell surrounding the core, wherein the core includes ion-exchanged zeolite that is ion-exchanged with a metal other than silicon (Si) and aluminum (Al) and the shell includes a mesoporous metal oxide.

公开(公告)号：US10717054B2

公开(公告)日：2020-07-21

申请号：US15527690

申请日：2015-11-16

Applicant: Korea University Research and Business Foundation

Inventor： Jungkyu Choi ,  Eun-Joo Kim

IPC: B01D71/02 ,  B01D53/22 ,  B01D67/00 ,  B01D69/10 ,  B01D69/02 ,  B01J29/70 ,  B01J35/06

Abstract: The present invention relates to a chabazite zeolite membrane with a controlled pore size and a production method thereof, wherein the sizes of pore space and pore mouth of the chabazite zeolite membrane are finely controlled through chemical vapor deposition. Through the chemical vapor deposition, defects present in the chabazite zeolite membrane are eliminated, and the pore size is effectively controlled. Thus, unlike hydrophilic membranes showing excellent CO2/N2 separation performance under a dry condition, the chabazite zeolite membrane with a controlled pore size according to the present invention has a hydrophobic surface, and thus can maintain excellent CO2/N2 separation performance even under a wet condition. Accordingly, the chabazite zeolite membrane of the present invention can effectively capture carbon dioxide from nitrogen under various environmental conditions.

公开(公告)号：US20180185792A1

公开(公告)日：2018-07-05

申请号：US15860556

申请日：2018-01-02

Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Jungkyu Choi ,  Kwan Young Lee ,  Eun-Joo Kim

IPC: B01D67/00 ,  B01D71/02 ,  B01D53/22 ,  C01B39/48

CPC classification number: B01D67/0088 ,  B01D53/228 ,  B01D67/0051 ,  B01D67/0083 ,  B01D69/10 ,  B01D71/028 ,  B01D2256/10 ,  B01D2256/24 ,  B01D2256/245 ,  B01D2257/504 ,  B01D2323/04 ,  B01D2323/08 ,  C01B37/02 ,  C01B39/48 ,  Y02C10/10

Abstract: The present invention relates to a method of preparing a decadodecasil 3R (DDR) type zeolite membrane and a membrane prepared thereby, and more particularly, to a method of preparing a hydrophobic decadodecasil 3R (DDR) type zeolite membrane having a continuous out-of-plane orientation by adding a substrate on which a seed layer is formed to a silica source synthetic precursor containing a methyltropinium salt and performing a hydrothermal synthesis, and a method of capturing and removing carbon dioxide using a membrane prepared thereby.

公开(公告)号：US11904282B2

公开(公告)日：2024-02-20

申请号：US17149823

申请日：2021-01-15

Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Jungkyu Choi ,  Kwan Young Lee ,  Minseong Lee

IPC: B01D67/00 ,  B01D53/22 ,  C02F1/44 ,  C01B39/02 ,  C01B39/48 ,  B01J20/18 ,  B01J20/28 ,  B01J20/30 ,  C10L3/10 ,  B01D69/10 ,  B01D71/02 ,  C02F101/34

CPC classification number: B01D67/0083 ,  B01D53/228 ,  B01D67/0051 ,  B01D67/0095 ,  B01D69/107 ,  B01D69/108 ,  B01D71/0281 ,  B01J20/183 ,  B01J20/28033 ,  B01J20/3057 ,  B01J20/3078 ,  C01B39/026 ,  C01B39/48 ,  C02F1/44 ,  C10L3/104 ,  C10L3/105 ,  C02F2101/34 ,  C10L2290/548

Abstract: The present invention relates to a method of controlling a defect structure in a chabazite (CHA) zeolite membrane, the CHA zeolite membrane having a controlled defect structure by the method and a method of separating CO2, H2, or He and water from a mixture of water and an organic solvent using the CHA zeolite membrane, and more particularly, to a method of controlling a defect structure in a CHA zeolite membrane that improves the separation performance by reducing the amount and size of defects formed in the CHA membrane structure when removing organic-structure-directing agents in the membrane through calcination at a low temperature using ozone.

公开(公告)号：US11731086B2

公开(公告)日：2023-08-22

申请号：US17326649

申请日：2021-05-21

Applicant: Korea University Research and Business Foundation

Inventor： Jungkyu Choi ,  Yanghwan Jeong

IPC: B01D71/02

CPC classification number: B01D71/028 ,  B01D2257/504 ,  B01D2323/40

Abstract: Disclosed are a MWW/DDR type gas separation membrane comprising at least one MWW type zeolite and at least one DDR type zeolite and a method for preparing the same. One of the MWW type zeolite and the DDR type zeolite is disposed on the other thereof, wherein at least one of the MWW type zeolite and the DDR type zeolite is epitaxially grown. In the gas separation membrane, the DDR type zeolite is epitaxially grown from the MWW type zeolite, or the MWW type zeolite is epitaxially grown from the DDR type zeolite. Thus, the MWW/DDR type gas separation membrane is synthesized using a structural continuity of the MWW type zeolite and the DDR type zeolite. Thus, the gas separation membrane has excellent separation efficiency.