Assertion: lignin | /r/CapableOf | use lignin
Facets:
value: as a precursor to carbon fiber
type: PURPOSE
Source sentences:
text: However, to use lignin as a precursor to carbon fiber, the lignin must undergo purification to attain less than 250 ppm ash in the final lignin product and pelletizing the lignin powder into pellets prior to the spinning process (Mainka et al.2015).