1. Department of Chemical, Petroleum and Gas Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran
2. Department of Natural Gas Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz 71348-51154, Iran
3. Discipline of Chemical Engineering, School of Engineering, University of KwaZulu-Natal, Howard College Campus, King George V Avenue, Durban 4041, South Africa