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公开(公告)号：US20190321785A1
公开(公告)日：2019-10-24
申请号：US16388917
申请日：2019-04-19
Inventor： Jungkyu CHOI , Kwan Young LEE , Sung-Won HONG
Abstract: The present invention relates to a method of post-treating a zeolite membrane, comprising treating a defective zeolite membrane with a chemical material such as a dye molecule, which has a size larger than that of the pores of the zeolite membranes and smaller than defects in the membrane, thereby healing the defects in the membrane. The post-treatment method performs post-treatment of the zeolite membrane under mild conditions (room temperature and normal pressure), thereby selectively healing the defects in the zeolite membrane and improving the performance of the zeolite membrane. In addition, the method may provide a high-performance membrane having a high separation factor, particularly under dry conditions.
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公开(公告)号：US20240359166A1
公开(公告)日：2024-10-31
申请号：US18682704
申请日：2022-02-08
Inventor： Ki Bong LEE , Kwan Young LEE , Hyun Wook KIM
IPC: B01J23/89 , B01D53/94 , B01J21/04 , B01J23/42 , B01J23/63 , B01J35/30 , B01J35/61 , B01J35/63 , B01J37/02 , B01J37/08
CPC classification number: B01J23/894 , B01D53/9413 , B01J21/04 , B01J23/42 , B01J23/63 , B01J23/8926 , B01J35/394 , B01J35/615 , B01J35/635 , B01J37/0205 , B01J37/0236 , B01J37/024 , B01J37/08 , B01D2255/1021 , B01D2255/2065 , B01D2255/20761 , B01D2255/9207 , B01D2257/404 , B01D2258/012
Abstract: The present invention discloses a low-temperature nitrogen oxide adsorber based on a metal oxide-impregnated platinum/gamma-alumina catalyst and a method for preparing the same. According to the present invention, the present invention provides a method for preparing a passive nitrogen oxide adsorber for removing nitrogen oxide from a diesel engine, comprising the steps of: (a) impregnating a gamma-alumina support with an aqueous solution of the noble metal catalyst precursor and drying it repeatedly up to a preset number of times; (b) obtaining a noble metal/gamma-alumina catalyst by sintering at a predetermined temperature after step (a) is completed; (c) impregnating the noble metal/gamma-alumina catalyst with an aqueous solution of a metal oxide precursor and drying it repeatedly up to a preset number of times; and (d) preparing a passive nitrogen oxide adsorber composed of Ax-B/γ-alumina by sintering at a predetermined temperature after step (c) is completed, wherein the A is a noble metal catalyst, x is the mass percent of the noble metal catalyst, and the B is a metal.
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公开(公告)号：US20240055575A1
公开(公告)日：2024-02-15
申请号：US18230009
申请日：2023-08-03
Applicant: SAMSUNG SDI CO., LTD. , Korea University Research and Business Foundation of Korea University
Inventor： Gwangwon PARK , Won-Gi AHN , Min-young JEONG , Taeil LEE , Juhye BAE , Jin Seok PARK , Hyun Wook JUNG , Kwan Young LEE
CPC classification number: H01M4/0404 , H01M4/13 , H01M4/139 , H01M2004/027
Abstract: A method of preparing a negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the negative electrode, and the method of preparing the negative electrode may include preparing an active material layer on a current collector so that a coated portion in which the active material layer is formed and an uncoated region in which an active material is not formed are alternatively arranged, the active material, wherein the coated portion is formed by coating a first negative active material layer composition having a capillary number of about 0.25 to about 1.50 on the current collector and coating a second negative active material layer composition having a capillary number of about 0.28 to about 1.50 on the first negative active material layer composition.
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公开(公告)号：US20230001360A1
公开(公告)日：2023-01-05
申请号：US17897798
申请日：2022-08-29
Inventor： Jungkyu CHOI , Kwan Young LEE , Sung-Won HONG
Abstract: Disclosed are a CHA zeolite membrane and a method of preparing the same, and more particularly, a CHA zeolite membrane having high capacity to separate CO2/N2 and CO2/CH4 even under wet conditions using a membrane produced using a synthetic precursor having a controlled ratio of Si and Al, a method of preparing the same, and a method of capturing and removing carbon dioxide using the membrane.
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公开(公告)号：US20210213396A1
公开(公告)日：2021-07-15
申请号：US17148699
申请日：2021-01-14
Inventor： Jungkyu CHOI , Kwan Young LEE , Sung-Won HONG
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.
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Patent Agency Ranking
公开(公告)号：US20200298187A1
公开(公告)日：2020-09-24
申请号：US16822211
申请日：2020-03-18
Inventor： Jungkyu CHOI , Kwan Young LEE , Yang-Hwan JEONG
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.
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7.发明申请公开(公告)号：US20210101140A1
公开(公告)日：2021-04-08
申请号：US17002894
申请日：2020-08-26
Inventor： Kwan Young LEE , Ki Bong LEE , Hyun Wook KIM
Abstract: Disclosed are a low-temperature de-NOx catalyst using a ceria-alumina complex support, and a method of manufacturing the same. According to the present invention, provided is a low-temperature de-NOx catalyst using a ceria-alumina complex support, manufactured by impregnating noble metal and metal oxides into a ceria-alumina complex support synthesized by treating a ceria precursor and an alumina precursor in a predetermined mass ratio by a co-precipitation method.
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公开(公告)号：US20210047193A1
公开(公告)日：2021-02-18
申请号：US16993479
申请日：2020-08-14
Inventor： Jungkyu CHOI , Kwan Young LEE , Eun-Hee JANG
IPC: C01B39/02 , C01B39/48 , B01J29/70 , B01J35/00 , B01J37/04 , B01J37/08 , B01J20/18 , B01J20/30 , C01B3/56
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.
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公开(公告)号：US20200206697A1
公开(公告)日：2020-07-02
申请号：US16729587
申请日：2019-12-30
Inventor： Jungkyu CHOI , Kwan Young LEE , Sung-Won HONG
Abstract: Disclosed are a CHA zeolite membrane and a method of preparing the same, and more particularly, a CHA zeolite membrane having high capacity to separate CO2/N2 and CO2/CH4 even under wet conditions using a membrane produced using a synthetic precursor having a controlled ratio of Si and Al, a method of preparing the same, and a method of capturing and removing carbon dioxide using the membrane.
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10.发明申请公开(公告)号：US20190330071A1
公开(公告)日：2019-10-31
申请号：US16469125
申请日：2017-11-27
Applicant: INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITY , KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
Inventor： Sung June CHO , Kwan Young LEE , Soon Hee PARK , Seung Gwan LEE
Abstract: Disclosed are method for synthesizing zeolites by using structure directing agent having benzyl groups and zeolites synthesized therefrom. A zeolite having various effects can be produced by using a material including a structure directing agent containing various benzyl groups, and raw material with various SiO2/Al2O3 molar ratios as alumina and silica source.
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