Abstract
As part of a comprehensive study on the reduction of COx on supported Ru catalysts we systematically investigated the dynamic interaction of CO2 with a Ru/γ-Al2O3 catalyst in a temporal analysis of products (TAP) reactor, focusing on the redox properties of the catalyst, specifically on the deposition of active oxygen (Oact) from CO2. This was investigated by exposing the pre-reduced catalyst to CO2 pulses and subsequent titration of the deposited Oact by CO pulses. CO2 is much less active for Oact deposition than O2. Reductive co-reactants reduce (CO) or increase (H2) the activity of CO2 for Oact deposition. 18O-marked CO2 pulses show facile oxygen exchange of CO2 with the catalyst, despite the inertness of the support. Based on excess effluent CO2 we conclude that surface carbonates can both build up on the surface upon interaction with CO or CO2 and also decompose upon O2 or CO2 pulsing, releasing additional CO2.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
