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公开(公告)号：US10029238B2
公开(公告)日：2018-07-24
申请号：US15343360
申请日：2016-11-04
Inventor： Chang Hyun Ko , Gyeong Ju Seo , Min Su Jang , Seong Mi Ahn
IPC: B01J23/48 , B01J23/50 , B01J23/75 , B01J21/04 , B01J37/34 , B01J35/00 , B01J37/02 , B01J35/02 , B01J35/08
Abstract: A method for preparing a catalyst having catalytically active materials selectively impregnated or supported only in the surface region of the catalyst particle using the mutual repulsive force of a hydrophobic solution and a hydrophilic solution and the solubility difference to a metal salt precursor between the hydrophobic and hydrophilic solutions. The hydrophobic solvent is a C2-C6 alcohol. The hydrophobic solvent is introduced into the catalyst support and then removed of a part of the pores connected to the outer part of the catalyst particle by drying under appropriate conditions. Then, a hydrophilic solution containing a metal salt is introduced to occupy the void spaces removed of the hydrophobic solvent, and the catalyst particle is dried at a low rate to selectively support or impregnate the catalytically active material or the precursor of the catalytically active material only in the outer part of the catalyst particle.
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公开(公告)号：US11918981B2
公开(公告)日：2024-03-05
申请号：US16648190
申请日：2017-11-06
Inventor： Chang Hyun Ko , Ji Yoon Jeon , Jeong Woo Yun , Eun Gyong Park
CPC classification number: B01J23/78 , B01J23/002 , B01J37/04 , B01J37/088 , C01B3/40 , C01B2203/0233 , C01B2203/0238 , C01B2203/0261 , C01B2203/1058 , C01B2203/1241
Abstract: The present invention relates to a perovskite metal oxide catalyst substituted with metal ions for reducing carbon deposition, a method for producing the same, and a process for performing a methane reforming reaction using this catalyst. According to the present invention, a novel type of catalyst is produced in which Ni, iron or cobalt in ionic form is substituted at a portion of the Ti site (B-site) of SrTiO3, MgTiO3, CaTiO3 or BaTiO3, which is a multicomponent metal oxide having a perovskite (ABO3) structure. Then, various methane reforming reactions (e.g., steam-methane reforming (SMR), dry reforming of methane (DRM), catalytic partial oxidation of methane (CPOM), etc.) may be efficiently and economically performed using this catalyst. The nickel-substituted perovskite metal oxide catalyst according to the present invention has a structure in which Ni2+, Co2+, Fe2+, Co3+ or Fe3+ is substituted in the perovskite lattice structure. Thus, the metal oxide catalyst has advantages in that carbon deposition thereon does not occur, and thus the catalyst has a high catalytic stability and may be used for a long time.
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公开(公告)号：US09861962B2
公开(公告)日：2018-01-09
申请号：US14466984
申请日：2014-08-23
Inventor： Chang Hyun Ko , Gyeong Ju Seo , Min Su Jang , Seong Mi Ahn
IPC: B01J23/48 , B01J23/50 , B01J23/75 , B01J21/04 , B01J37/34 , B01J35/00 , B01J37/02 , B01J35/02 , B01J35/08
CPC classification number: B01J23/75 , B01J21/04 , B01J35/008 , B01J35/02 , B01J35/08 , B01J37/0203 , B01J37/0207 , B01J37/341 , B01J37/343
Abstract: A method for preparing a catalyst having catalytically active materials selectively impregnated or supported only in the surface region of the catalyst particle using the mutual repulsive force of a hydrophobic solution and a hydrophilic solution and the solubility difference to a metal salt precursor between the hydrophobic and hydrophilic solutions. The hydrophobic solvent is a C2-C6 alcohol. The hydrophobic solvent is introduced into the catalyst support and then removed of a part of the pores connected to the outer part of the catalyst particle by drying under appropriate conditions. Then, a hydrophilic solution containing a metal salt is introduced to occupy the void spaces removed of the hydrophobic solvent, and the catalyst particle is dried at a low rate to selectively support or impregnate the catalytically active material or the precursor of the catalytically active material only in the outer part of the catalyst particle.
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