In order to obtain low volatilization and a high char yield, low
heating rates (10–15 8C/min) should be used. Char has a high fixed
carbon content which is important for producing activated carbon.
Lower heating rate will increase dehydration and improve the
stabilization of the polymeric components [2,3]. However, the
microporosity of char has been found to be independent of the
precursor composition and the carbonization heating rate [2].
Table 1 presents the proximate and ultimate analysis of several
lignocellulosic biomass materials.