1. Department
of Chemical and Environmental Engineering, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K.
2. Department
of Petroleum Technology, University of Technology, Baghdad, Iraq
3. Faculty
of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
4. School
of Chemistry,Centre for Biomolecular Sciences, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K.
5. Johnson Matthey, P.O. Box 1, Belasis Avenue, Billingham, Cleveland, TS23 1LB, U.K.