Volumetric mixing ratio of raw material and addition of glycerin had stronger effects on properties of RDF5 than
extrusion temperature. An increase in amount of dry cooked rice and addition of glycerin in the raw material
provided the RDF5 with higher density and lower compressive strength. Dry cooked rice content had a negative
effect on overall thermal efficiency of the cook stove while glycerin addition had a positive effect. Maximum
thermal efficiency (25.86%) was observed when using RDF5 prepared at mixing ratio of 7:1:1:1, extrusion
temperature of 260oC and addition of glycerin as a fuel. RDF5 prepared in this study was an alternative fuel for the
combustion process. Pollutant emission of the fuel will be investigated in the future work.