Additive metal modified Fe-SSZ-13 molecular sieve, preparation and application as denitration catalyst

• Main Authors: MING SHUJUN, LI XINNAN, LI YAN, LI TAO
• Format: Patent
• Language: Chinese; English
• Published: 07.07.2023
• 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 an assistant metal modified Fe-SSZ-13 molecular sieve, preparation and application of the assistant metal modified Fe-SSZ-13 molecular sieve as a denitration catalyst, and belongs to the technical field of industrial catalysis. The preparation process of the catalyst mainly comprises the following steps: adding ferric salt and auxiliary metal salt into a complexing agent aqueous solution to form a metal complex; mixing the aluminosilicate gel mixture with a metal complex, and then adding a seed crystal SSZ-13 to obtain initial gel; the preparation method comprises the following steps: preparing an auxiliary agent metal-modified Fe-SSZ-13 molecular sieve, then carrying out hydrothermal crystallization, washing, drying, ammonium exchange and special atmosphere calcination to remove a template agent so as to obtain the auxiliary agent metal-modified Fe-SSZ-13 molecular sieve, and compared with the Fe-SSZ-13 molecular sieve, the NH3-SCR activity, N2 selectivity and high-temperature hydrot