Comprehensive Utilisation of Biomass Tar for High Volumetric Capacitance Porous Carbon and Modified Bio-resin

Biomass tar is a by-product generated during biomass gasification. Because of the toxic and harmful nature of biomass tar, its treatment method has become the concern of environmental protection field and related researchers. In this paper, biomass tar was separated into the heavy tar and the phenol-containing liquor after enrichment. Porous carbon (PCs) was prepared using the heavy tar by one-step carbonization activation. The results show that PC_3 has the highest specific surface area of 352 m 2 g −1 and mesoporosity ratio of 56.25%. The as-prepared electrode displayed an excellent electrochemical performance for portable super-capacitors, which is a volumetric capacitance of 349 F cm −3 . Assembled super-capacitors have an energy density of 21.65 Wh kg −1 at a power density of 123 W kg −1 . The bio-resins were modified with the phenol-containing liquor. The results showed that the thermal stability of modified resins had been improved and the structure did not change significantly. This research provides an environmentally friendly and comprehensive utilisation methods for the utilisation of biomass tar. Graphical Abstract This study provides a new pathway for the waste treatment of biomass gasification