This paper is the result of work carried out by a large group of researchers;
and the author would like to acknowledge the following principal contributors : Professor Ian Gartshore;
Dr Zia Abdullah;
Dr Paul Nowak;
Dr Peri Sabhapathy;
Paul Matys and Dr Pingfan He. Funding from the Department of Energy (US);
Energy Mines and Resources Canada;
Industry Canada;
Pratt and Whitney Canada and NSERC is also gratefully acknowledged;