Affiliations: Department of Chemical Engineering, University of
Birmingham, Birmingham B15 2TT, U.K | Positron Imaging Centre, School of Physics and
Astronomy, University of Birmingham, Birmingham B15 2TT, U.K. | Present address: Environment & Process Technology
Center, Nippon Steel Corporation, Futtsu 293-8511, Japan | Present address: Department of Chemical Engineering,
University of Birmingham, Birmingham B15 2TT, U.K. | Present address: School of Engineering, University of
Warwick, Coventry, CV4 7AL, U.K.