Properties and methanol to olefins reaction performance of CuSAPO-34 molecular sieves synthesized by short-time reconstruction method
CuSAPO-34 molecular sieves were synthesized through a short-time reconstruction method by using molecular sieve seeds containing copper as the copper source.The influence of the type of template agent on properties of the seed crys-tals,CuSAPO-34 molecular sieves and the reaction performance of methanol to olefins was investigated.The results showed that the seed crystal synthesized using triethylamine and diethylamine as mixed tem-plate agents had lower crystallinity and smaller grain size;the CuSAPO-34 molecular sieve prepared from this seed crystal had strong acidity and high olefin selectivity.The selectivity of ethylene was 47.41％,the selectivity of ethylene+propylene+butylene was 90.37％,and n(ethylene)/n(propylene)was 1.37.
methanol to olefinsCuSAPO-34 molecular sieveseed crystalreconstruction methodethylenepropylenebutylene
万方数据
维普
