کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
62593 | 47646 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Acrylate and propoxy-groups: Contributors to deactivation of Au/TiO2 in the epoxidation of propene Acrylate and propoxy-groups: Contributors to deactivation of Au/TiO2 in the epoxidation of propene](/preview/png/62593.png)
Reaction pathways of propene in the selective propene epoxidation over Au/TiO2 are discussed on the basis of in-situ IR spectra. A non-selective route for conversion of propene via acrylate to carboxylates and carbonates is demonstrated, likely contributing to catalyst deactivation. Propoxy-groups are predominantly formed by reaction of the catalyst surface with the reaction product propene oxide (PO), and are highly stable under reaction conditions. These propoxy-groups are considered as deactivating species, and not as intermediates for the production of PO, or carboxylates and carbonates.
An additional route to deactivation of Au/TiO2 in the oxidation of propene is proposed.Figure optionsDownload high-quality image (25 K)Download as PowerPoint slide
Journal: Journal of Catalysis - Volume 266, Issue 2, 10 September 2009, Pages 286–290