1. International Joint Research Center for Biomass Materials, Southwest Forestry University, Kunming, Yunnan 650051, P. R. China
2. State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
3. Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
4. Department of Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, United Kingdom