fig7

Figure 7. FTIR differential spectra following (A and B) pure C₃H₈ and (C and D) C₃H₈/H₂ mixture (volume ratio = 1:1) pulse adsorption for Pt/Sn-Al₂O₃, and corresponding mass spectrum of (E) pure C₃H₈ and (F) C₃H₈/H₂ mixture pulse. The pulse experiments were carried out at 600 °C by pulses of pure propane and C₃H₈/H₂ mixture (pulse volume = 0.50 cm³ STP) to the in situ cell at Ar (30 mL/min) atmosphere. The yellow dashed line represents the adsorption peak. FTIR: Fourier transform infrared spectroscopy; STP: standard temperature and pressure.