Carrier effects of active carbon for methanol carbonylation with supported transition metal catalysts
- Univ. of Tokyo (Japan)
Transition metals such as nickel or noble metals showed excellent catalytic activities for the vapor phase carbonylation of methanol to acetic acid. Reaction proceeded via the carbonylation of methanol to methyl acetate and its successive carbonylation to acetic acid anhydride followed by the hydrolysis. Under slightly pressurized conditions and at around 250{degrees}C methanol was completely carbonylated to acetic acid with the selectivity of 97% or higher. Also, other group 8 metals including noble metals showed excellent catalytic activity only when they were supported on active carbon, whose activity, ordered by strength of metal-halogen bonding showed a volcano-shape relationship with the peak at Rh. The role of active carbon as the active carrier was clarified by kinetics and catalyst characterization which showed that active carbon promoted the reductive elimination of intermediate for acetic acid formation by donating electron from carbon to nickel species.
- OSTI ID:
- 370960
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Vapor phase carbonylation of dimethyl ether and methyl acetate with supported transition metal catalysts
Hemilabile phosphonate-phosphane-RH-catalysts for homogeneous and heterogeneous carbonylation