The authors gasified Ca-loaded carbon sample with labeled O2. From the gas analysis during O2-gasification and the subsequent temperature programmed desorption (TPD), the difference between the Ca-catalyzed and the uncatalyzed gasification was investigated, and it was attempted to clarify how Ca enhances O2-gasification. Furthermore, by analyzing the surface of Ca-loaded carbon with secondary ion mass spectrometer (SIMS), they directly examined the surface oxygen complexes after gasification. From the experiments using gas mixtures, it can be safely said that (1) the remarkable formation of C18O2 can not be attributed to the gas phase reaction between C18O and 18O2, but to the primary reaction of carbon and 18O2, (2) the rates of O2-related exchange reactions are negligibly slow in comparison with the rate of carbon gasification, and (3) the rate of isotope exchange reaction between CO2 and CO is not so large as that of carbon gasification.
|Number of pages||2|
|Journal||Extended Abstracts and Program - Biennial Conference on Carbon|
|Publication status||Published - 1991 Jan 1|
|Event||20th Biennial Conference on Carbon - Santa Barbara, CA, USA|
Duration: 1991 Jun 23 → 1991 Jun 28
ASJC Scopus subject areas