Supported ZnO catalysts for the conversion of alkanes:About the metamorphosis of a heterogeneous cat

• 作 者: S.Arndt B.Uysal A.Berthold T.Otrebma Y.Aksu M.Driess R.Schomcker
• 机 构: Technische Universitāt zu Berlin,Institut fūr Chemie,Straβe des 17 Juni 124,10623 Berlin,Germany,Akd
• 出 处: Journal of Natural Gas Chemistry
• 发表日期: 2012年05期
• 关键词: heterogeneous selectivity alkanes ethane calcination oxidative propane drawback

ZnO could be a suitable catalyst for the oxidative conversion of CH4,C2H6 and C3H8.However,the main drawback is its thermal instability.Therefore,ZnO supported on ZrO 2,TiO2,γ-Al2O and SiO2 was investigated for the oxidative dehydrogenation of propane and ethane,and the oxidative coupling of methane.The stability of the supported ZnO is partially improved,but ZnO reacts with the support material,forming new compounds (Zn-zirconates,-titanates,-aluminates and-silicates),which already occurs below reaction temperature.This might also be the case for many other heterogeneous catalysts.

ZnO could be a suitable catalyst for the oxidative conversion of CH4, C2H6 and C3H8.However, the main drawback is its thermal instability. Before, ZnO supported on ZrO2, TiO2, γ-Al2O and SiO2 was investigated for the oxidative dehydrogenation of propane and ethane, and the oxidative coupling of methane. The stability of the supported ZnO is partially improved, but ZnO reacts with the support material, forming new compounds (Zn-zirconates, -titanates, -aluminates and-silicates), which already occurred below reaction temperature. this might also be the case for many other heterogeneous catalysts.