Effect of Cu and Zn ion-exchange locations on mordenite performance in dimethyl ether carbonylation

Dimethyl ether carbonylation over zeolites

“…The chemical principle is that transition metals have strong ability for CO adsorption and activation, which facilitates CO insertion into the methyl group adsorbed on a vicinal acid site of HMOR. Cu, Ni, Co, Zn modified HMOR catalysts, prepared either by impregnation or ion-exchange, showed higher activity or stability than the parent HMOR in DME carbonylation, with Cu as the most efficient promoter [38,44,[51][52][53][54][55][56][57][58] . Interestingly, co-addition of Cu and Zn to HMOR resulted in more dramatic improvement in both activity and stability as compared to the addition of either Cu or Zn individually.…”

Copper Affects the Location of Zinc in Bimetallic Ion‐Exchanged Mordenite

“…No copper or zinc ions were brought into the framework T sites maintaining the original Si/Al ratio. The calcined samples were characterized, as we described previously, by energy‐dispersive X‐ray spectroscopy, Ar physisorption, DRIFTS, TEM, and TPR . XPS analyses were performed on the calcined samples before and after DME carbonylation using a Kratos Analytical AXIS‐165 spectrometer.…”

“…The calcined samples were characterized, as we described previously, by energydispersive X-ray spectroscopy, [20] Ar physisorption, [83] DRIFTS, [83] TEM, [20] and TPR. [81] XPS analyses were performed on the calcined samples before and after DME carbonylation using a Kratos Analytical AXIS-165 spectrometer. A monochromatic Al Ka (hv = 1486.6 eV) was used at a power of 168 W. Peak deconvolution and identification was conducted using CasaXPS software.…”

“…[10] It should be noted that our earlier-reported UV-vis spectroscopy results for the Cu/H-MOR sample showed the presence of CuO nanoparticles and isolated ion-exchanged Cu 2 + ions, with no presence of copper oxo-complexes. [81] Figure 5. Deconvoluted DRIFT spectra in ca.…”

Recent advances in the synthesis and applications of mordenite zeolite – review

“…Then methyl acetate is converted into ethanol by hydrogenation process. 102,103 Here we can discuss some of the literature related to carbonylation reaction using mordenite zeolite. In 2019, Zhao and his collaborators prepared mordenite zeolite which was pretreated with hot water for different durations (5, 10, or 15 min) to improve catalytic performance.…”