Insights into coated NiCrAl open-cell foams for the catalytic partial oxidation of CH4

摘要: High resistance alloys are the basis of structured catalysts that outperform pelletized materials in mass and/or heat transfer limited processes and allow movement from large- to small-scale more efficient for energy environmental applications. Herein, open-cell NiCrAl foams coated with investigated as an alternative FeCrAl, tracking change both foam coating their interaction during life-time (as-prepared, calcined after catalytic tests). Bare activated by electrodeposition Rh/Mg/Al hydrotalcite type compounds, followed calcination at 900 °C, tested under harsh conditions partial oxidation methane (CPO) H2 production; axial temperature profiles along centerline bed were also evaluated. The combination spectroscopic, microscopic imaging diffraction techniques reveals insights into structure macro- nano-scale (e.g. nano XRD/XRF synchrotron tomography). surface is rapidly evenly hydrotalcite-type compounds through electrodeposition; a pretreatment bare is, however, mandatory. Activated foams, calcination, develop scale made Cr2O3, NiCr2O4, α-Al2O3, which stable reaction does not alter coating, either its (MgO MgAl2O4) or composition. Although thermally treated protective Al2O3 scale, coatings performances unaltered. Under conditions, decrease hot spots CPO measured comparison FeCrAl foams.