INS characterization of the carbonylation of methanol using mordenite zeolite
Acetic acid is a very important bulk chemical. Currently, the most of acetic acid is produced through the carbonylation of methanol using Iodide promoted Iridium or Rhodium catalysts. As such catalysts are expensive and their large amount is required, their substitution by acid heterogeneous catalysts in the methanol carbonylation, known as Koch process, has been of growing interest in recent years. Among, many solid acid catalysts, zeolites and particularly mordenite (MOR) have shown very high activity, selectivity and stability, being a promising new technology for this particular production. The carbonylation of methanol and dimethyl ether evolve to the desired acetic acid or ester (acylation process). MOR may be used as a catalyst in this process as it has been shown by previous studies that the rate of methyl acetate synthesis (per total Al content) is the highest on H-MOR (Si/Al=10:1). The main objective of this project is to study the mechanism of CO + CH3-O-CH3 <=> CH3-COO-CH3 reaction on zeolite mordenite, aiming to detect the possible methoxy adsorbed intermediate. If the methoxy intermediate is not formed, the mechanism must be revised and a new one could be suggested.
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LEMISHKO Tetiana; JIMENEZ RUIZ Monica; Miguel Palomino; REY Fernando and SASTRE German Ignacio. (2018). INS characterization of the carbonylation of methanol using mordenite zeolite. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-470