3.2. Pulp viscosity and Fock reactivity
Fig. 1. Viscosity and Fock reactivity as a function of pulp consistency during cellulase treatment. Cellulase charge of 1.5 mg/g, pH 4.8, 55 °C.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.3. Alpha cellulose, alkali solubility and yield
Alpha Sulfo-Cy5 NHS ester is one of the important quality parameters for dissolving pulp, which was listed in Table 1. As can be seen, the alpha cellulose kept constant during the cellulase treatment at various pulp consistency, and a slight decrease can be observed when extending the treatment time to 24 h, which may be caused by the cellulose degradation. Wang et al. (2014) also observed a decrease of alpha cellulose content when using endoglucanases rich cellulase treatment of bleached softwood pulp to upgrade for dissolving pulp.
Other pulp properties of cellulase treated pulp as a function of pulp consistency and treatment time.Pulp consistency (%)Time (h)Alpha cellulose (%)S10 (%)S18 (%)S10–S18 (%)Yield (%)3293.76.383.922.4699.7493.46.523.772.7599.52493.37.833.923.9199.910294.17.613.594.0299.9494.17.813.734.0899.82493.87.543.444.1099.520294.07.873.983.8999.6494.17.963.804.1699.52493.57.943.574.3799.2Without cellulase293.05.423.511.9199.9492.85.613.432.1899.72492.85.703.322.3899.6Full-size tableTable optionsView in workspaceDownload as CSV