1. Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering
2. Chinese Academy of Sciences
3. Beijing 100190
4. P. R. China
5. Department of Chemical & Biochemical Engineering
6. College of Mathematics Science
7. Bohai University
8. Jinzhou 121013
9. Technical University of Denmark
10. DK 2800 Kgs. Lyngby
11. Denmark