EXHAUST GAS PURIFICATION FILTER AND EXHAUST GAS PURIFICATION APPARATUS

• Main Authors: UETANI MASATOSHI, MISHIMA TAKAHIRO
• Format: Patent
• Language: English; Korean
• Published: 03.05.2016
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

배기가스 중에 함유되는 입자상 물질(PM)을 연소시키는 촉매와, 질소 산화물을 질소로 환원하는 SCR 촉매를 공존시켜도, SCR 촉매의 촉매 기능이 손상되지 않는 배기가스 정화 필터 및 해당 필터를 구비한 배기가스 정화 장치를 제공한다. 알칼리 금속에서 선택되는 1종 또는 2종 이상의 원소와, Zr, Si, Al 및 Ti에서 선택되는 1종 또는 2종 이상의 원소를 함유하는 산화물과, 실리카/알루미나 비가 15 이상인 제올라이트를 구비하는 것을 특징으로 하고 있다. Provided are an exhaust gas purification filter in which, even in the coexistence of a catalyst capable of combusting particulate matter (PM) contained in exhaust gases and an SCR catalyst capable of reducing nitrogen oxides in exhaust gases to nitrogen, the catalytic function of the SCR catalyst is prevented from being impaired, and an exhaust gas purification apparatus equipped with the filter. An exhaust gas purification filter includes: an oxide containing one or more elements selected from alkali metals and one or more elements selected from Zr, Si, Al, and Ti; and a zeolite having silica / alumina ratio of 15 or more.