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- W2191851377 abstract "The conversion of methanol to hydrocarbons (MTH) over H-ZSM-22 was studied by operando time- and space-resolved X-ray diffraction (XRD) at 370–385 °C and WHSV = 2 g/g h at the Swiss–Norwegian Beamline at ESRF. The performance of a commercial H-ZSM-22 sample was compared before and after acid–base treatment, and with and without propanol co-feed, respectively. N2 adsorption, Scanning Electron Microscopy and propyl amine desorption experiments showed that acid–base treatment led to enhanced accessibility of acid sites, mainly due to the formation of mesopores between agglomerated H-ZSM-22 crystals. The catalytic set-up allowed us to simultaneously observe the catalyst activity and unit cell volume variations by time- and space-resolved HXRD in operando conditions. The expansion of the unit cell and final flattening at different positions in the catalytic bed matched very nicely with the catalytic activity gradients. Different scenarios provided different behaviors and gave insights in the effect of morphology and co-feed process on the activity in the MTH process. This technique is the only one which has so far been able to provide direct evidence of the behavior of the species inside the catalytic reactor." @default.
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- W2191851377 date "2016-06-01" @default.
- W2191851377 modified "2023-10-16" @default.
- W2191851377 title "Time- and space-resolved high energy operando X-ray diffraction for monitoring the methanol to hydrocarbons reaction over H-ZSM-22 zeolite catalyst in different conditions" @default.
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- W2191851377 doi "https://doi.org/10.1016/j.susc.2015.10.049" @default.
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