Upgrading of low rank coal and woody biomass mixture by hydrothermal treatment

► Hydrothermal treatment of low rank coal and woody biomass mixture. ► Results by a bench scale continuous apparatus are predictable from a batch test. ► The treated mixture is upgraded and dewatered. ► Thermal stability and aromatic apportionment is dependent on mixing ratio. ► Polymerization is synergistically promoted by mixing low rank coal and woody biomass.