Figure 10.

Impacts of the rolling friction coefficient between the lignin particles and membranes on the coordination number distribution (a) ${\mu }_{\mathrm{p}-\mathrm{p}}=0.6$; (b) ${\mu }_{\mathrm{p}-\mathrm{p}}=1.8$; (c) ${\mu }_{\mathrm{p}-\mathrm{p}}=3.0$.