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- W4292858498 endingPage "112605" @default.
- W4292858498 startingPage "112605" @default.
- W4292858498 abstract "• Direct methane to methanol conversion over Cu-ferrierites used as model Cu-zeolites. • Close catalytic behavior of Cu-oxo species generated by activation in air or helium. • Under applied conditions, Cu/Al ratio increased yield but reducing specific activity. • in situ UV-Vis evidenced the Cu-oxo species after activation and their reaction consumption. • Showed results suggest use of air as greener oxidation agent, instead O 2 , He or N 2 O. Among the plentiful scientific research focused to find new routes to substitute stronger unsustainable chemical processes, the direct conversion (DC) of methane to methanol (MTM) over exchanged Cu-oxo cations in zeolites has gained great attention. Within that process, the paper proposed that the first activation step of the Cu-zeolite to catalyze the cycling DC-MTM be done with air instead industrial oxidant gases. Thus, Cu-oxo exchanged ferrierites, as model Cu-zeolites, were prepared and evaluated in the DC-MTM at 210 ºC. XRD, SEM/EDS, H 2 -TPR, FTIR of in situ adsorbed CO and pyridine were used to characterize the activated Cu-ferrierites. In situ DRS-UV-Vis evidenced the generation of Cu-oxo species after activation in air or He and their subsequent consumption during methane reaction. The air and He-activated Cu-ferrierites showed a close catalytic behavior that was supported by their similar profile to the formed Cu-oxo clusters. Thus, being more environmentally friendly to select air as an activation agent, instead of the use of pure O 2 , inert gases, or even N 2 O." @default.
- W4292858498 created "2022-08-24" @default.
- W4292858498 creator A5047153493 @default.
- W4292858498 creator A5058040767 @default.
- W4292858498 creator A5080753259 @default.
- W4292858498 creator A5071147127 @default.
- W4292858498 date "2022-09-01" @default.
- W4292858498 modified "2023-10-16" @default.
- W4292858498 title "Direct methane to methanol stepwise conversion over Cu-oxo species in zeolites – Insights on the Cu-zeolite activation in air or helium from in situ UV-Vis analyses" @default.
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- W4292858498 doi "https://doi.org/10.1016/j.mcat.2022.112605" @default.
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