Fig. 3: Operando PEPICO for 4PG hydrodeoxygenation without solvent co-feed.
From: A solution for 4-propylguaiacol hydrodeoxygenation without ring saturation
a photoionization mass spectra as a function of time on stream at 40 °C. b Individual photoionization mass spectra from (a) shown for comparison. c Photoionization mass spectra at different reaction temperatures; the photon energy used in (a–c) is 10.5 eV; (d–f) ms-TPES of (d) m/z 142, (e) m/z 126, (f) m/z 114 at 150 or 200 °C. g proposed reaction routes in non-solvent and isooctane systems. Reference spectra and FC simulations are marked by arrows. Reaction conditions: 10 mg of Ru/C, 10 sccm H2, 4PG dipped in quartz wool was maintained at 70 °C, ~1.5 bar reactor pressure. (0.04% 4PG, 6% for isooctane, rest H2).
