1. Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, P. R. China
2. College of Science, Nanjing Forestry University, Nanjing 210037, P. R. China
3. United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Bio-Oils Research Unit, 1815 N. University St., Peoria, IL 61604, USA