Gas phase selectivities and carbon balances of the catalysts tested in glycerol reforming at 600 °C.CatalystSelectivity (%)H2CO2Carbon balanceb (%)H2CO2COHCaPtMg5Al–H48.550.09.72.32.398PtMg3Al–H65.067.910.22.42.291PtMg5Al–O51.853.010.63.72.394PtMg3Al–O68.259.527.014.52.682aHC = hydrocarbons: ethane, DZNep and methane.bCarbon balance considering only gaseous and liquid products.Full-size tableTable optionsView in workspaceDownload as CSV
Examining the data summarized in Table 3, it is possible to learn that the H2/CO2 ratio is similar for the four catalysts. The calculated values for this ratio satisfactorily approach the theoretical value (H2/CO2 = 2.3) attributed to the reforming reaction (Eq. (1)). Consequently, under the chosen conditions, we can conclude that the two families of LDH-derived catalysts can indeed convert glycerol to hydrogen through steam reforming reaction.
Fig. 4. Glycerol global conversion (Xglobal) during time on stream for steam reforming reaction at 600 °C.Figure optionsDownload full-size imageDownload as PowerPoint slide