The gasification reactions in Fig.

The gasification reactions in Fig. 4b occurred vigorously at
temperatures higher than 800 C, resulting to a steeper mass loss
slope in cWCG than in WCG. This is due to the difference in the
specific surface area (SSA) of the samples, as shown in Table 3.
During carbonization, the SSA ofWCG sharply increased with heattreatment
time. For instance, the SSA of WCG (807.54 m2 g1) approaches
that of CB (782.23 m2 g1) after only 30 min of carbonization.
Thus, increased SSA from gasification could provide more
reaction sites between the solid fuels and gases.