The Lewis acid sites (LA) in catalyst plays an important role in the propylene oxide rearrangement reaction. In order to introduce more LA in Beta, Zn-Beta was prepared by two-step postsynthesis method. The results of PyIR showed that the acidity of the sample changed greatly, the Brønsted acid sites (BA) disappeared, and new LA was created with the introduction of Zn. The location of the acid sites of Zn-Beta was determined by trimethylpyridine adsorbed IR, the results showed that the new LA was distributed on the inner surface of the pore. The mechanism of propylene oxide rearrangement with Zn-Beta as catalyst was studied by in-situ DRIFTS. It was proved that the epoxy bond of propylene oxide interacted with new LA to form a transition state between the bond of CO and CO, and then converts to carbonyl of propionaldehyde. The catalytic performance of Zn-Beta was better than Beta.

催化剂中的路易斯酸位点（LA）在环氧丙烷重排反应中起重要作用。为了在β中引入更多的LA，通过两步后合成法制备了Zn-Beta。PyIR的结果表明，样品的酸度发生了很大变化，布朗斯台德酸位（BA）消失了，并且在引入锌的情况下创建了新的LA。Zn-β-酸的酸性位点是通过三甲基吡啶吸附红外光谱确定的，结果表明新的LA分布在孔的内表面。通过原位DRIFTS研究了以Zn-β为催化剂的环氧丙烷重排机理。证明环氧丙烷的环氧键与新的LA相互作用形成C O和C键之间的过渡态O，然后转化为丙醛的羰基。Zn-Beta的催化性能优于Beta。