1. Greenhouse Gas Research Center, Korea Institute of Energy Research, 71-2 Jang-dong,
Yuseong-gu, Daejeon 305-343, Korea
2. Department of Chemical and Biological
Engineering, Korea University, 1 Anam-dong,
Sungbuk-gu, Seoul 136-701, Korea
3. Department of Chemical Engineering
and Nano-Bio Technology, Hannam University, 461-6 Jeonmin-dong, Yuseong-gu, Daejeon 305-811, Korea