Extended Data Fig. 4: PDH performance over 0.25%Pt–Sn@S-1 catalysts.
From: Pt migration–lockup in zeolite for stable propane dehydrogenation catalyst
a, Propane conversion and propylene selectivity over 0.25%Pt–Sn@S-1(4.00 μm) and 0.25%Pt–Sn@S-1(0.10 μm) after pretreatments at different temperatures. b, Propane conversion and propylene selectivity over 0.25%Pt–Sn@S-1(4.00 μm) and 0.25%Pt–Sn@S-1(0.10 μm) in several reaction sequences of 600–650–550 °C, respectively. c, Propane conversion and propylene selectivity over 0.25%Pt–Sn@S-1(4.00 μm) in the presence of H2S. The mixture of H2S (25 ppm) and propane was used as reactant. d, Propane conversion and propylene selectivity over 0.25%Pt–Sn@S-1(4.00 μm) in the presence of H2O. The mixture of H2O (37.8 vol%) and propane was used as reactant. Catalytic test conditions: atmospheric pressure, WHSV = 5.3 h−1 and T = 600 °C. e,f, Specimen morphology of spent 0.25%(Pt–Sn2)2@S-1(4.00 μm) after PDH for APT analysis (e) and 3D atom distribution map of Si, O, Sn and Pt within 0.25%(Pt–Sn2)2@S-1(4.00 μm) after PDH (f). Bounding box dimensions: 30 × 40 × 110 nm3.
