Catalyst coating for gasoline particulate filter carrier and preparation method of catalyst coating

• Main Authors: XIONG YULIN, ZHANG HANLANG, LI GUANGFENG, QIAO FENGHUA, WANG QIUYAN, ZHANG YUPENG
• Format: Patent
• Language: Chinese; English
• Published: 04.02.2020
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a catalyst coating for a gasoline particulate filter carrier. The catalyst coating is smeared inside a GPF (gasoline particulate filter) carrier channel and is prepared by mixing at least three kinds of grout A-C, specifically, the grout A comprises modified alumina and a noble metal active component, and the content of the noble metal active component is 0.01-1.5%; the grout B comprises a composite oxide Ce1 and a noble metal active component, and the content of the noble metal active component is 0.01-6.0%; and the grout C comprises a composite oxide Ce2 and a noblemetal active component, and the content of the noble metal active component is 0.01-6.0%. The at least three kinds of grout with noble metal active components of different contents are prepared, the noble metal active components in the catalyst which is prepared by mixing the grout finally can be sufficiently dispersed, the prepared catalyst can be smeared inside the GPF carrier channel at a single time, purification of t