Liu, Shengyong, College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002; Key Laboratory of New Materials and Equipment for Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Zhengzhou, 450002; International Joint Laboratory of Biomass Energy and Nanomaterials in Henan Province, Zhengzhou, 450002; Henan Provincial Key Laboratory of Rural Renewable Energy, Zhengzhou, 450002, China