energies Article Effect of Biomass Particle Size on the Torrefaction Characteristics in a Fixed-Bed Reactor Yajing He 1, Shihong Zhang 2, Dongjing Liu 1 , Xing Xie 1,* and Bin Li 1,* 1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China 2 State Key ...