Kinetics and mechanism of methanol carbonylation over RhY zeolite

Stabilizing Isolated Rhodium Cations by MFI Zeolite for Heterogeneous Methanol Carbonylation

“…Kinetic analyses of methanol carbonylation over Rh@ZSM-5 were performed at 403−423 K (Figure S16). An Arrhenius plot derived an apparent activation energy value of 33.5 kJ/mol (Figure 3e), which appeared to be distinctly lower than those of familiar Rh catalysts: e.g., 61.5 kJ/mol over [Rh-(CO) 2 I 2 ] − , 36,37 56.5 kJ/mol over Rh/Y zeolite, 38 and 42.0 kJ/mol over [Rh(CO)(dhpmo)I 2 Me]. 39 Since the methanol carbonylation catalyzed by Rh@ZSM-5 occurs dominantly within the confined space of the zeolite (Figure S10), the lower apparent activation energy over might originate from the electronic confinement of the MFI zeolite.…”

Promoting Effect of Tin on Ni/C Catalyst for Methanol Carbonylation

“…Liu and Wang (1992) investigated methanol carbonylation on catalysts prepared by several metals and molecular sieves. The application of molecular sieves toward the carbonylation was also reported (Andersen and Scurrell, 1983; Christensen and Scurrell, 1977;Scurrell and Howe, 1980; Takahashi et al, 1979; Yashima et al, 1979). Catalysts of activated carbon supported transition metals were also tested (Fujimoto et al, 1983(Fujimoto et al, ,1987Ornato et al, 1985Ornato et al, , 1988; Robinson et al, 1972;Shikada et al, 1985).…”

The formation of a well defined rhodium dicarbonyl in highly dealuminated rhodium-exchanged zeolite Y by interaction with CO

“…On the other hand, the formation of Rh'(CO), without significant change in the hydroxyl band region (fig. [4][5][6] indicates also that other possibilities should be considered. In order to obtain some results regarding this problem we recorded f i r .…”