公开(公告)号：US09931615B2

公开(公告)日：2018-04-03

申请号：US15107299

申请日：2014-12-16

Applicant: HEESUNG CATALYSTS CORPORATION

Inventor： Hyun-sik Han ,  Seung Chul Na ,  Eun-seok Kim ,  Joon-Woo Kim

IPC: B01J23/63 ,  B01J23/42 ,  B01J37/04 ,  B01J23/44 ,  B01J23/89 ,  B01J35/04 ,  F01N3/20 ,  F01N3/28 ,  B01J35/00 ,  B01J23/58 ,  F01N3/10

CPC classification number: B01J23/63 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/2042 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/20753 ,  B01D2257/7025 ,  B01D2258/018 ,  B01J23/42 ,  B01J23/44 ,  B01J23/58 ,  B01J23/892 ,  B01J23/894 ,  B01J35/0006 ,  B01J35/04 ,  B01J37/04 ,  F01N3/10 ,  F01N3/20 ,  F01N3/2825 ,  Y02A50/2322

Abstract: Disclosed is a catalyst composition for inhibiting the deactivation of a catalyst for purifying exhaust gas from a compressed natural gas combustion system, which contains platinum and palladium as precious metal components. Specifically, a catalyst for purifying exhaust gas from a compressed natural gas vehicle or a static combustion system is configured such that a ceramic substrate is impregnated with palladium-impregnated first alumina, platinum-impregnated second alumina, and a ceria component, wherein the first alumina is further impregnated with a cocatalyst selected from the group consisting of barium, nickel, lanthanum, samarium, and yttrium, thus significantly inhibiting the deactivation of the CNG lean burn engine catalyst.