The dynamic behavior of surface oxygen complexes formed during the gasification of carbon with isotopically labeled oxygen was studied by transient kinetics (TK). The surface oxygen complexes after the gasification were analyzed with temperature-programmed desorption (TPD). From the results of the TK and TPD, a detailed mass balance of oxygen during the gasification was established and the fate of each surface oxygen complex such as acid anhydride, lactone, carbonyl, or ether during the gasification was clarified. Furthermore, it was verified that carbonyl and ether produce CO2 and CO through the reaction with O2, while acid anhydride and lactone desorb as CO2 (and CO) without direct interaction with O2. As a whole, the formation of carbonyl and ether by O2 chemisorption and their reaction with O2 were found to be the main route for the carbon gasification with O2 under the present conditions.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology