1. Gas
Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
2. School
of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
3. Department
of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
4. Faculty
of Engineering and the Built Environment, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa