Characterization and kinetic study of BiMoLax oxide catalysts for oxidative dehydrogenation of 1-butene to 1,3-butadiene

• BiMoLax (x=0–0.4) oxides are investigated in oxidative dehydrogenation of 1-butene.
• La addition in Bi–Mo oxide catalyst can promote the catalytic activity.
• Yield for 1,3-butadiene could be correlated to the ease of oxygen mobility.
• BiMoLa0.2 oxide catalyst exhibits very stable performance.

BiMoLax oxide catalysts with a variation of lanthanum component were prepared by a co-precipitation method, and applied to the oxidative dehydrogenation (ODH) of 1-butene to 1,3-butadiene (BD). The results reveal that the lanthanum content has significant effects on the catalyst performance. BiMoLa0.2 exhibits the superior activity and stability during the 100 h test. H2 temperature-programmed reduction (H2-TPR), 1-Butene temperature-programmed re-oxidation (TPRO) and temperature-programmed desorption (TPD) characterization show that the oxygen mobility and the adsorption ability of 1-butene of catalysts are two crucial factors determining catalytic performance in ODH reaction. The kinetics analysis finds that the ODH reaction over BiMoLa0.2 can occur more easily.

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