Lignosulfonate can be applied as a binder for pyrolysis carbon black according to several patents. Lignosulfonate binders also give pellets their strength through solid type interactions (although to a less extent than starch) but also the interactions of the charged acid groups with the surface play a large role. These surface interactions could lead to stronger pellets but also might cause some problems if the surface morphology of the pyrolysis carbon black is not compatible. Nonetheless lignosulfonates present a cheap and promising option.
