1. Institute of Process Engineering, Chinese Academy of SciencesBeijing100190 P. R. China
2. Artie McFerrin Dept. of Chemical EngineeringTexas A&M UniversityCollege Station TX77843
3. Texas A&M Energy Institute, Texas A&M UniversityCollege Station TX77843
4. PetroChina Dushanzi Petrochemical CompanyXinjiang833600 P. R. China