SCR CATALYST

• Main Author: MIZUNO SATOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 15.03.2018
• 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

PROBLEM TO BE SOLVED: To provide an SCR catalyst that is excellent in NOx purification property and is highly practical.SOLUTION: Provided is an SCR catalyst comprising a mixture of an aluminosilicate molecular sieve carrying copper which is a skeleton outer metal and having a CHA skeleton, and a silicoaluminophosphate molecular sieve having a CHA skeleton, and for selective catalytic reduction of NOx, and in which the silicoaluminophosphate molecular sieve and aluminosilicate molecular sieve have a silicoaluminophosphate:aluminosilicate molar ratio of 0.1:1.0 to 0.4:1.0.SELECTED DRAWING: Figure 1 【課題】NOx浄化性に優れ、実用性の高いSCR触媒を提供する。【解決手段】骨格外金属である銅を担持し、CHA骨格を有するアルミノケイ酸塩モレキュラーシーブと、CHA骨格を有するシリコアルミノリン酸塩モレキュラーシーブと、の混合物を含み、NOxを選択式触媒還元するSCR触媒であって、シリコアルミノリン酸塩モレキュラーシーブとアルミノケイ酸塩モレキュラーシーブが、0.1:1.0〜0.4:1.0のシリコアルミノリン酸塩：アルミノケイ酸塩モル比を備えている。【選択図】図１