## Based on the cellobiose concentration

Based on the cellobiose concentration C(t) at various residence times t, the rate constant k (s−1) of cellobiose decomposition reaction can be determined, assuming the cellobiose decomposition reaction follows the first-order kinetics. The correlation between −ln[C(t)/C(0)] versus residence time t for cellobiose decomposition under all the conditions are plotted in Fig. 3. A linear correlation is observed for all the conditions so that Cyclosporine cellobiose decomposition under acidic conditions also follows the first order reaction kinetics. The reaction rate constant of cellobiose decomposition increases with decreasing the initial pH of cellobiose solution. Obviously, cellobiose decomposition is accelerated under acidic conditions. Compared to those at an initial pH of close to 7, the rate constants at an initial pH of 4 are almost doubled for all the temperature conditions.

Fig. 3. Correlations between −ln[C(t)/C(0)] and residence time during cellobiose decomposition in HCW at various temperatures and initial pH conditions. (a) 200 °C; (b) 225 °C; and (c) 250 °C.Figure optionsDownload full-size imageDownload as PowerPoint slide