C(ads) O(ads)CO(g) (3)
If 1.5 wt% carbon were to desorb fully by
combination to CO2 (Eq. (2)), a total mass loss of 5.5%
would be expected. The observed mass loss of 5.1%
suggests that 80% of the carbon desorbs as CO2 and
20% desorbs as CO. These desorption events are
endothermic as observed by the downward peaks at
536 and 761 ℃ in the weight corrected heat flow
recorded during differential scanning calorimetry
(Fig. 5(b)). These endothermic events are most obvious
in the first derivative of the weight corrected heat flow
(Fig. 6(a)).
Since the present thermal experiments take place
under flowing N2(g), the only source of oxygen for the