Catalytic oxidative dehydrogenation of 1-butene to 1,3

Highlights

Temperature Programmed Surface Reaction (TPSR) shows that oxidative dehydrogenation (ODH) takes place.

1-butene can be efficiently converted to 1,3-butadiene (BD) using CO₂ as a soft oxidant.

The main byproducts, tr/cis-2-butenes, can be converted to BD with similar yield.

A reaction mechanism is proposed based on the experiment results.

Abstract

1,3-Butadiene (BD) is an important raw material in petrochemical industry and its consumption is expected to increase dramatically. Catalytic oxidative dehydrogenation (ODH) of 1-butene is an alternative route to produce BD. In this study, a soft oxidant, CO₂ was used instead of O₂. Fe₂O₃ was selected from a preliminary screening using Temperature Programmed Surface Reaction (TPSR). The catalytic performance was greatly improved by supporting Fe₂O₃ on Al₂O₃. This contribution clearly shows that both Fe₂O₃ and CO₂ are involved in the reaction. The main byproducts, trans/cis-2-butenes, can also be converted to BD with similar BD yield. A preliminary reaction mechanism is proposed.

Keywords

• 1-Butene;
• 1,3-Butadiene;
• Oxidative dehydrogenation;
• Soft oxidant

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