1. Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, P. R. China
2. Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
3. Faculty of Engineering and the Built Environment, Tshwane University of Technology, Private
Bag X680, Pretoria 0001, South Africa