Increase in processing flue gas flow rate while maintaining the fluidization state and filtration performance in a low-temperature continuous regeneration filter using a fluidized bed

•Processing gas flow rate in a fluidized bed filter increases by large bed particles.•Similar fluidization state leads to similar collection efficiency.•Large bed particles have slightly larger BET surface areas than small bed particles.•The amount of catalyst on a large particle is comparable to that on a small particle.•Continuous regeneration can be achieved at 320 °C with a collection efficiency 100%.