The flow characteristics of low concentration combustible waste gas processing system was experimentally studied on a self-built test apparatus.The effects of packing modes

cycle time

gas flow rate and feed gas concentration on gas flow characteristics in hot and cold state were analyzed.The results show that:the resistance loss of gas flow presents obvious periodicity under cold and hot conditions;mixed-packing honeycomb ceramics and catalyst improves the combustion stability of the system;with an increase in gas flow rate

the relationship of gas flow resistance and velocity gradually transitions from linearity to a parabola;the gas flow resistance under hot condition is greater than that under cold condition

and it rises with the increase of cycle time and feed gas concentration.Moreover

on the basis of present experimental data

the gas flow resistance under cold condition is regressed with the form of the Ergun equation

which will be helpful for numerical simulation of the system.