Torrefaction of beechwood: A parametric study including heat of reaction and grindability

► Beechwood chips are torrefied at lab scale with different parameters. ► Mass loss of the dry solid is a good indicator for the degree of torrefaction. ► Heat consumption of the reactor is measured to determine the heat of reaction. ► The heat of reaction ranges from −199 J/g (exothermic) to 148 J/g (endothermic). ► Grindability in terms of HGI is moderate or easy for solid mass loss >30%.