1. Departments of Petroleum and Chemical Engineering University of Wyoming Laramie WY 82071 USA
2. College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu 610059 P. R. China
3. College of Environmental & Resource Science of Shanxi University Taiyuan 030001 P. R. China
4. School of Chemistry and Chemical Engineering Henan Normal University Xinxiang Henan 453007 P. R. China
5. College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
6. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan Shanxi 030024 P. R. China
7. Key Laboratory on Resources Chemicals and Materials of Ministry of Education Shenyang University of Chemical Technology Shenyang 110142 P. R. China
8. School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332 USA
9. Department of Chemical Engineering University of Utah Salt Lake City UT 84112 USA
10. State Key Laboratory of Chemical Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China
11. Department of Chemistry University of Oxford Oxford OX1 3QR UK