Abstract
The influence of tin loading of Rh-Sn-B/γ-Al2O3 catalysts on the selective hydrogenation of oleic acid to fatty alcohol was studied. The catalysts were characterized by N2 sorptometry, temperature programmed reduction and X-ray photoelectron spectroscopy. Cyclohexane dehydrogenation and cyclopentane hydrogenolysis were also used to evaluate the metal function.Sn and Rh are in interaction since the conversion values of the cyclohexane, cyclopentane, and TPR profiles are modified by tin addition. Moreover, XPS analysis showed that Sn modifies the amount of Rh on the surface and its reduction state. The yield to oleyl alcohol was maximum for the Rh(1 wt%)-Sn(4 wt%)-B/γ-Al2O3 and Rh(1 wt%)-Sn(5 wt%)-B/γ-Al2O3 catalysts. This behavior could be explained considering that the Sn addition limits the Rh activity for hydrogenation of the CC double bond, thus increasing the formation of oleyl alcohol. At low Sn content, high selectivity to octadecane appears due to the total hydrogenation of the CC, COH and CO bonds.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.