Doppler sensing of unsteady dense particulate flows

Chemical looping combustion is a proposed process for heat or power generation with integrated carbon dioxide separation, using solid oxygen carrier particles. The circulation rate of the oxygen carrier particles is a crucial parameter in the operation of the system, but is difficult to measure. This work reports on the investigation of applying a microwave Doppler sensor approach for monitoring the flow of solids in part of a chemical looping combustion system, the L-valve, which typically has a dense bed of particles with intermittent movement horizontally.