<p>Two layer ignited honeycomb briquettes(TIHBs) are widely used as a summer cooking fuel in residential households, and several additives are used to improve their combustion characteristics. This study was aimed to confirm the combustion promoting characteristics of new combustion additive-Na₂FeO₄ through thermogravimetric analysis and to determine its optimum additive amount in TIHBs. Thermogravimetric analysis of raw coal, raw coal + Na₂FeO₄, raw coal + KMnO₄ and raw coal + Fe₂O₃ samples were carried out to determine the combustion promoting properties of the additives. The relative order of activity of the additives is Na₂FeO₄ &gt; KMnO₄ &gt; Fe₂O₃. Based on the confirmation of the superior combustion promoting properties of Na₂FeO₄, TIHBs were prepared and the combustion characteristics with the addition of Na₂FeO₄ were compared. It is reasonable to add 1&#xa0;L of 47% Na₂FeO₄ solution per ton of coal, with ignition time reducing from 348 to 313s and combustion rate from 5.02 to 5.7&#xa0;g min⁻¹. The use of Na₂FeO₄ is an effective way to improve the combustion characteristics of TIHBs and save coal.</p>