An attempt was made to compare the desorption behavior of the surface oxygen complexes in an inert atmosphere with that in the O2-gasification atmosphere. For this purpose, the transient kinetics (TK) with switching 18O2 to 16O2 was carried out and from this TK experiment the in situ desorption behavior of 18O2-containing surface complexes was evaluated during the 16O2 gasification. The thermal stability of the 18O complexes remaining on the carbon was analyzed by temperature-programmed desorption (TPD). In addition, the TK with switching O2 to He was done and then the desorption behavior of the complexes was observed under He flow. It was found that the desorption behavior of the surface oxygen complexes in He is different from that in O2. This finding indicates that the stability of the surface oxygen complexes in nongasification conditions does not correspond to the stability under O2-gasification conditions.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology