Operation of the Transport Gasifier™ at the PSDF, Wallace, F.; Guan, X.; Leonard, R.; Nelson, M.; Vimalchand, P.; Peng, W.; Smith, P.V.; Breault, R.W. , Gasification: The Technology of Choice: Thirty-First International Technical Conference on Coal Utilization and Fuel Systems, Number KBR Paper, Clearwater, FL, USA, p.9, (2006)