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Mordenite (MOR) catalysts with different acid site distribution were synthesized. The structural variation and acid site distribution were systematically investigated by different methods. The characterization results revealed that the structure and morphology remained largely the same over different samples. Al atoms preferred to enter the strong acid site position in the 8 memberring (MR) pores, and the acid sites in 12 MR pores largely decreased when fewer Al resources were used. The mass transfer efficiency was greatly affected by the distribution of acid sites, thus resulting in discrepancies in catalytic test results. The carbonylation performance of MOR catalysts mainly depended on the Brønsted acid sites in the 8 MR pores while the acid sites in the 12 MR pores had more influence on the mass transfer efficiency. It was feasible to enhance the carbonylation performance of MOR catalysts by adjusting the acid site distribution through changing the Al content.

An alumina catalyst was prepared by mixing and pinching with pseudo-boehmite, and the catalyst was reamed with polyethylene glycol.