1. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, U.K.
2. Department of Chemical Engineering, Aristotle University of Thessaloniki, Un. Box 455, University
Campus, GR 541 24, Thessaloniki, Greece
3. Chemical Engineering-School of Engineering and Computer Science, University of Hull, HU6 7RX, Kingston Upon Hull, U.K.