| 초록 |
The deactivation of ferrierite (FER) zeolite was mainly induced by coke deposition during a gas-phase carbonylation of dimethyl ether (DME) to methyl acetate (MA) on the acidic sites. DME carbonylation reaction is a promising reaction because MA can be used for the production of ethanol or acetic acid through a subsequent hydrogenation or hydrolysis reaction. The carbonylation reaction can selectively occur on Brønsted acidic sites, especially on the 8 membered-ring (8MR) channels. To suppress the coke deposition with less deactivation, a highly crystalline seed-derived FER was found to be effective. However, coke precursors formed on the acidic sites caused a severe deactivation from the beginning of carbonylation reaction by blocking the active sites. In the present study, the distribution of coke deposited on the acidic sites were precisely analyzed by using various characterization tools. |
