1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, P. R. China, Liaoning Key Laboratory of Petrochemical Technology and Equipments, Dalian University of Technology, Dalian 116012, P. R. China, and Department of Energy and Geo-Environmental Engineering, The Energy Institute, The Pennsylvania State University, 209 Academic Projects Building, University Park, Pennsylvania 16802