1. Institute of Chemical Industry of Forestry Products; Chinese Academy of Forestry; Nanjing 210042 China
2. Jiangsu Qianglin Bio-Energy and Bio-Materials Limited Company; Li Yang Jiangsu 213364 China
3. Institute of New Technology of Forestry, Chinese Academy of Forestry; Beijing 100091 China
4. Key Laboratory of Biomass Energy and Material, Jiangsu Province; Nanjing 210042 China