1. Qatar University; Department of Chemical Engineering; P.O. Box 2713 Doha Qatar
2. Texas A&M University at Qatar; Department of Chemical Engineering; Education City PO Box: 23874 Doha Qatar
3. Qatar University; Gas Processing Research Center; P.O. Box: 2713 Doha Qatar
4. University of Burgos; Department of Chemistry; Juan de Austria 1 09001 Burgos Spain