摘要
通过对Y分子筛进行铵交换,获得了分子筛孔道相似、酸密度在2.87~12.99 mmol/g范围内的一系列分子筛。在控制变量的前提下,考察了这一系列分子筛在异丁烷-丁烯烷基化反应中的催化性能,研究了分子筛酸密度对其催化烷基化反应活性的影响规律。结果表明,分子筛总酸密度越大,其相对氢转移活性越高,催化烷基化反应单程寿命越长,越有利于烷基化目标产物的生成。
A series of Y zeolites with similar pore structures and different acid densities in the range of 2.87 to 12.99 mmol/g were prepared by exchanging Na~+ ion with ammonium salts. The effect of acid density on their catalytic performance was studied. The results show that high hydride activity and long single-pass catalyst life are due to the high acid density, which is beneficial for high selectivity of target products.
引文
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