1. WCU Department of Energy Engineering, College of Engineering, Hanyang University, Seoul 133-791, Republic of Korea
2. School of Chemical Engineering, College of Engineering, Hanyang University, Seoul 133-791, Republic of Korea
3. Department of Chemical Engineering, R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli, Taoyuan 32023, Taiwan
4. Institute for Chemical Process and Environmental Technology, National Research Council, Ottawa, Ontario K1A 0R6, Canada