1,3-Butadiene Production by Simple Dehydrogenation of 1-Butene in the Presence of Steam Over Pt Supported on SnO2-Coated Al2O3.

Simple dehydrogenation of 1-butene to form 1,3-butadiene was performed at 550–620 °C using Pt/SnO₂-Al₂O₃ catalysts (SnO₂ = 0–23 wt%) in the presence of steam. The low SnO₂ content catalyst (7 wt%) showed high selectivity to 1,3-butadiene, but the catalytic activity dramatically decreased due to coke formation during the dehydrogenation. With increasing SnO₂ content in the catalyst, the deactivation was suppressed by a decreasing amount of coke. The high one-pass yield (30%) was obtained at 620 °C using the Pt/SnO₂-Al₂O₃ catalyst containing 18.0 wt% SnO₂ without serious deactivation of the catalyst. [ABSTRACT FROM AUTHOR]