Figure 10. Effect of water partial pressure (0.35 – 0.70 kPa) and flow rate (1.54 – 3.07 x 10-6 mol H2O s-1) on the CH3OH and C2H4O selectivity over MIL-100(Cr) as indicated by the molar flow rates detected for both products at the reactor outlet as a function of time. (Extraction at 473 K, Reaction conditions: 473 K, 2.9 kPa N2O, 1.5 kPa CH4, 2 h, activated at 523 K in He for 12 h)
Scheme 2. (a) Representation of the MIL-100 surface following the reaction of CH4 and N2O in which 1 mol methoxy is formed per mol CH4 reacted. (b) Formation of acetaldehyde exclusively through the secondary reaction of CH3OH molecules formed ’in-situ’ (blue) (c) Formation of acetaldehyde exclusively by reaction with CH3OH fed at the inlet (black), resulting in the formation of 1 acetaldehyde molecule per methoxy consumed.