Preparation method and application of catalyst containing low-silicon composite metal Beta molecular sieve

• Main Authors: YUAN LONG, JIANG YEWEI, CHENG HONGKUI, ZHOU TONG, LI YUANDONG, WANG CHUANG, HAO WEI
• Format: Patent
• Language: Chinese; English
• Published: 04.09.2020
• 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 and application of a catalyst containing a low-silicon composite metal Beta molecular sieve. The Fe-Beta molecular sieves with different morphologies are prepared by a one-step method by controlling the composition of synthesis raw materials and a structure-directing agent under the condition of no template agent, so that the acidity and pore channels of the molecular sieves are optimized, and the purpose of optimizing the performance of the molecular sieves is achieved. Lanthanum salt is used for further modifying the Fe-Beta molecular sieve for the first time by adopting an impregnation method, so that the denitration temperature interval of the Fe-Beta molecular sieve is greatly widened, the denitration performance and hydrothermal stabilityof the Fe-Beta molecular sieve are improved, and the Fe-Beta molecular sieve is relatively good in sulfur poisoning resistance and relatively low in cost. The low-silicon composite metal Beta molecular sieve catalyst disclose