P&W Rocketdyne Celebrates Commissioning of Commercial-Scale Prototype Dry Solids Pump to Provide High-Efficiency, Low-Emission Gasification Tuesday, April 12, 2012Pratt & Whitney Rocketdyne celebrated the commissioning of a commercial-scale dry-solids pump ??? a revolutionary feed system integrated with PWR???s compact gasifier to efficiently gasify coal, petcoke and other solid fuels.