1. National Energy Technology Laboratory, U.S. Department
of Energy, Morgantown, West Virginia 26507, United States
2. Department
of Chemical and Biological Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju, Chungbuk 380-702, Republic of Korea
3. Department
of Chemical and Biological Engineering, Korea University, 5-1
Anam-Dong, Sungbuk-Ku, Seoul 136-713, Republic of Korea
4. Department
of Transportation System Engineering, Graduate School
of Transportation, Korea National University of Transportation, Uiwang-si, Gyeonggi-do 437-763, Republic of Korea