Many smokeless fuels are of low reactivity and thus not very suitable for use in open fire places as the ignition delay is unduly long and rate of heat release is low. It would appear that these properties may be modified in a favorable sense by mixing woodchips with such fuels. This obviously increases the quantity of smoke generated, but wood-smoke is generally considered than that produced by coal.
Reference:
Van Doornum, G.A.W. 1968. Combustion properties of mixtures of smokeless fuels and wood. http://hdl.handle.net/10204/12836 .
Van Doornum, G. A. W. (1968). Combustion properties of mixtures of smokeless fuels and wood Retrieved from http://hdl.handle.net/10204/12836
Van Doornum, G.A.W Combustion properties of mixtures of smokeless fuels and wood. 1968. http://hdl.handle.net/10204/12836
Van Doornum GAW. Combustion properties of mixtures of smokeless fuels and wood. 1968 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/12836