배기가스 정화촉매

• Main Authors: SHONO EMI, YOSHIDA SATOSHI, HIKAZUDANI SUSUMU
• Format: Patent
• Language: Korean
• Published: 12.12.2018
• 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

선박용 디젤엔진 등으로부터 배출되는 비교적 저온영역의 배기가스 중의 질소산화물을, 종래보다 적은 양의 환원제를 사용하여 효율적으로 제거 할 수 있는 배기가스 정화용 촉매의 제공을 목적ㆍ과제로 한다. 연소배기가스 중의 질소산화물을 질소로 환원하여 제거하는 연소배기가스 정화방법에 사용되고, 당해 연소배기가스에는, 당해 질소산화물을 환원하기 위한 환원제로서 알코올이 첨가되는 배기가스 정화촉매로서, 당해 촉매는, 담체와 당해 담체에 담지되는 탈질촉매금속으로 이루어지고, 당해 담체는, 푸리에변환 적외분광장치(ＦＴ-ＩＲ)에 의하여 측정되는 Ａｌ-ＯＨ스펙트럼의 피크면적(A)을 측정담체중량(W)으로 나눈 값(S)이 1500∼3500인 제올라이트인 것을 특징으로 한다. Object and purpose are to provide an exhaust gas purification catalyst capable of efficiently removing a nitrogen oxide in a relatively low-temperature exhaust gas discharged from a marine diesel engine or the like using a reducing agent in a smaller amount than in the past. An exhaust gas purification catalyst is used in a combustion exhaust gas purification method for removing a nitrogen oxide in a combustion exhaust gas by reducing the nitrogen oxide to nitrogen, wherein an alcohol is added to the combustion exhaust gas as a reducing agent for reducing the nitrogen oxide, and is characterized in that the catalyst is composed of a support and a denitration catalytic metal supported on the support, and the support is a zeolite having a value (S) obtained by dividing a peak area (A) in an Al-OH spectrum measured with a Fourier transform infrared spectrometer (FT-IR) by a measurement support weight (W) of 1500 to 3500.