Abstract
Two commercial soot samples are analysed by temperature programmed desorption mass spectroscopy (TPD-MS) in order to determine the functional groups at their surface. A systematic approach has been developed, which assures that all functional groups decomposing between 100 °C and 900 °C can be distinguished and assigned. For the understanding of the mechanism of the reaction between soot and NO 2 diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and TPD-MS are applied. Both spectroscopic techniques monitor the formation of new species. The reaction with NO 2 results in the formation of an acidic functional group, which decomposes into CO 2 and NO at 140 °C. It is proven that NO 2 reacts directly with the carbon surface. Pre-existing functional groups do not interfere. From these results the reaction sequence has been concluded.
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.
