fig4

Figure 4. Product distribution of different catalysts as a function of time on stream during PDH for (A) Pt/Al₂O₃ and (B) Pt/Sn-Al₂O₃ samples. Dehydrogenation conditions: m_catalyst = 100 mg, C₃H₈/H₂ = 1/1 (2.3 mL/min of propane and 2.3 mL/min of H₂), T_reduction = 500 °C, T_reaction = 600 °C, GHSV = 1,000. PDH: Propane dehydrogenation; GHSV: gas hourly space velocity.