Structure–reactivity relationships in VOx/TiO2 catalysts for the oxyhydrative 
scission of 1-butene and n-butane to acetic acid as examined by in 
situ-spectroscopic methods and catalytic tests

Bentrup, Ursula; Brückner, Angelika; Fait, Martin; Kubias, Bernd; Stelzer, Jean Boris

doi:10.1016/j.cattod.2005.11.023

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Structure–reactivity relationships in VOx/TiO₂ catalysts for the oxyhydrative scission of 1-butene and n-butane to acetic acid as examined by in situ-spectroscopic methods and catalytic tests

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Kubias, Bernd
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Bentrup, U., Brückner, A., Fait, M., Kubias, B., & Stelzer, J. B. (2006). Structure–reactivity relationships in VOx/TiO₂ catalysts for the oxyhydrative scission of 1-butene and n-butane to acetic acid as examined by in situ-spectroscopic methods and catalytic tests. Catalysis Today, 112(1-4), 78-81. doi:10.1016/j.cattod.2005.11.023.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-06A8-0

Abstract

Different VOx/TiO₂ catalyst have been catalytically tested and studied by in situ-spectroscopic methods (FT-IR, UV/vis, EPR) in the oxyhydrative scission (OHS) of 1-butene and n-butane to acetic acid (AcOH). While 1-butene OHS follows the sequence butane → butoxide → ketone → AcOH/acetate with a multitude of side products also formed, n-butane OHS leads to AcOH, CO_x and H₂O only. Water vapour in the feed improves AcOH selectivity by blocking adsorption sites for acetate. The admixture of Sb₂O₃ was found to improve AcOH selectivity which is due to deeper V reduction under steady state conditions and lowering of surface acidity. VO_x/TiO₂ catalysts with sulfate-containing anatase are the most effective ones. Covalently bonded sulfate at the catalyst surface causes specific bonding of VO_x, stabilizes active V species and ensures their high dispersity.