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Plasma-assisted catalytic dry reforming of methane (DRM) over metal-organic frameworks (MOFs)-based catalysts.
- Source :
-
Applied Catalysis B: Environmental . Jan2020, Vol. 260, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- • Plasma-assisted dry reforming of methane (DRM) over UiO-67 MOF-based catalyst. • UiO-67 material in the discharge zone improved the plasma generation and gas-phase reactions. • Pt nanoparticles supported on UiO-67 promoted surface reactions, improving DRM. • PtNP@UiO-67 catalysts were robust and stable in the plasma-assisted catalytic DRM. Plasma-assisted dry reforming of methane (DRM) was performed in a dielectric barrier discharge (DBD) reactor. The effect of different packing materials including ZrO 2 , UiO-67 MOF and PtNP@UiO-67 on plasma discharge was investigated, showing that ZrO 2 suppressed the plasma generation while UiO-67 improves it due to its porous nature which favours the formation of filamentary microdischarges and surface discharges. The improved plasma discharge increased the conversion of CH 4 and CO 2 by about 18% and 10%, respectively, compared to the plasma-alone mode. In addition, the distribution of hydrocarbon products changed from dominant C 2 H 6 in the plasma-alone mode to C 2 H 2 and C 2 H 4 in the UiO-67 promoted plasma-assisted DRM. The UiO-67 MOF was stable in plasma, showing no significant changes in its properties under different treatment times, discharge powers and gases. Pt nanoparticles (NPs) on UiO-67 improved plasma-assisted DRM, especially the selectivity due to the presence of surface reactions. Due to the dehydrogenation of hydrocarbons over Pt NPs, the selectivity to hydrocarbons decreased by 30%, compared to the UiO-67 packing. In situ diffuse reflectance infrared Fourier transformed spectroscopy (DRIFTS) was carried out to probe the surface reactions on PtNP@UiO-67 catalyst, showing the decomposition of surface formats to CO and C 2 H 4 dehydrogenation over the metallic Pt. The PtNP@UiO-67 catalyst showed good reusability in the plasma-assisted DRM, and H 2 production was improved by high CH 4 /CO 2 molar ratio and low feed flow rate. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 260
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 141582626
- Full Text :
- https://doi.org/10.1016/j.apcatb.2019.118195