Preparation method for synthesizing copper-containing SCR catalyst with CHA structure by one-step method

• Main Authors: JIANG DONGQING, LYU MEILIN
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2020
• 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 discloses a preparation method for synthesizing a copper-containing SCR catalyst with a CHA structure by a one-step method, which comprises the following steps: S1, synthesizing a copper-containing zeolite molecular sieve with a CHA structure by a hydrothermal synthesis method, S2, separating, drying and calcining the synthesized copper-containing zeolite molecular sieve, S3, preparing coating slurry from the copper-containing zeolite molecular sieve, S4, coating a honeycomb carrier with the slurry, drying and roasting, thus producing the SCR catalyst. For producing the copper-containing zeolite molecular sieve SCR catalyst with the CHA structure, a one-step synthesis method is adopted, so that a Cu base can be uniformly dispersed on a molecular sieve with the CHA structure,meanwhile, the loading capacity of the Cu base on the CHA molecular sieve is easy to control, and the activity of the SCR catalyst is improved. 本发明公开了一种一步法合成具有CHA结构的含铜SCR催化剂的制备方法，包括以下步骤：S1：水热合成法合成CHA结构含铜沸石分子筛，S2：将合成的含铜沸石分子筛分离