A new procedure for gasification of powdered solid fuel in a flow of a gaseous oxidant in the course of filtration of the mixture through an inert packing was suggested and tested. This procedure allows the productive capacity of a single reactor to be increased owing to acceleration of the reactions, i.e., to an increase in the reaction surface area with a decrease in the fuel particle size. As shown in cold (without ignition) experiments, the powdered fuel was partially accumulated in the inert porous packing, which led to the pressure buildup in the reactor. In gasification experiments with ignition, the powdered fuel was not accumulated in the reactor if the temperature in the fuel feeding zone was no less than 500°С. In this case, the linear velocity of the gas increased owing to thermal expansion, and this velocity was sufficient for the coal particles fed to the reactor to be entrained by the flow.