Abstract
As compared to conventional micrometer-sized mordenite particles, nanometer-sized mordenite gave a much higher activity and better stability in dimethyl ether carbonylation to methyl acetate by suppressing the deposition of hard coke. A structural analysis revealed that intra-crystalline diffusion limitation of the reactants and products to and from the active sites inside the channels was greatly decreased by reducing the zeolite size to the nanometer size. Nanometer-sized H-mordenite (HMOR) showed a much higher reaction rate and stability than micrometer-sized HMOR, resulting from the improvement of molecule transportation efficiency by reducing the crystalline size.
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