1. Waste, Energy and Environmental Impact Unit, Eurecat, Centre Tecnològic de Catalunya, Plaça de la Ciència, 2, 08243 Manresa, Spain
2. Joint International Research Laboratory of Biomass Energy and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
3. School of Material Science and Engineering, University of Jinan, Jinan, 250022, P. R. China
4. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China