Acidic mordenite zeolite was modified with various alkyimidazolium ions with different sizes via ion-exchange and applied as dimethyl ether (DME) carbonylation catalysts. Introducing 1, 3-dimethylimidazolium ions into zeolite can selectively remove the acid sites in 12-membered ring (MR) channels, significantly enhancing the stability and activity. Additionally, ion-exchange with organic ions was used to control the acid site distributions to separately investigate the DME carbonylation reaction in 8-MR and 12-MR channels. The reaction results indicated that the acid sites in 12-MR channels can concurrently catalyze the carbonylation and methanol-to-hydrocarbons (MTH) reactions, and MTH reactions seriously suppress the carbonylation activity in 8-MR channels.

酸性丝光沸石通过离子交换用各种尺寸的烷基咪唑鎓离子改性，并用作二甲醚（DME）羰基化催化剂。在沸石中引入1，3-二甲基咪唑鎓离子可以选择性地去除12元环（MR）通道中的酸位，从而显着提高稳定性和活性。此外，使用有机离子进行离子交换来控制酸位点分布，以分别研究8-MR和12-MR通道中的DME羰基化反应。反应结果表明，在12-MR通道中的酸性位点可以同时催化羰基化反应和甲醇制烃（MTH）反应，而MTH反应会严重抑制8-MR通道中的羰基化活性。