| abstract |
The invention discloses a low-cost multi-level porous SAPO-34 molecular sieve, a preparation method and application thereof, and belongs to the technical field of molecular sieve synthesis. The invention uses lithium silicon powder waste as a raw material, and provides a preparation method of SAPO-34 molecular sieve, which includes: acid washing, drying and sieving of lithium silicon powder to obtain powder; mixing water and phosphorus source uniformly to obtain Phosphorus source solution; mix powder and phosphorus source solution, add template agent, and mix evenly to obtain a mixed solution; after the mixed solution is aged at room temperature, the temperature is raised for hydrothermal crystallization to obtain a crystallized solution; the crystallized solution is cooled and washed , filtration, drying and calcination to obtain SAPO-34 molecular sieve. The present invention utilizes the waste slag lithium silicon powder piled up in large quantities at present, and at the same time, by controlling the amount of each material and optimizing the synthesis conditions, the SAPO-34 molecular sieve has a micro-intermediate multi-level pore structure, and effectively solves the drawback of a single micro-pore structure. , and it can be used as a carrier material for low-temperature denitration catalysts. |