1. School of Chemical
Engineering, Yeungnam University, Gyeongsan, North Gyeongsang 38541, South Korea
2. Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea
3. Smart I/O Control Device Research Section, Electronics and Telecommunications Research Institute, Daejeon 305-700, Republic of Korea
4. Department of Chemical
and Biological Engineering, Hanbat National University, Daejeon 305-719, Republic of Korea
5. Department
of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea