The result showed that there were two kinds of active sites on SAPO-34 and SAPO-44 molecular sieves, which were corresponding to the acidic sites with different strength on the molecular sieves.
结果表明，SAPO分子筛表面存在两种活性中心，这两种活性中心与分子筛表面不同的酸性中心相对应。
2
The invention relates to a modification method of a SAPO molecular sieve, mainly aiming at solving the problem of poor performance of the SAPO molecular sieve in the prior art.