Reduction of VOC released by pore-forming precursors during firing of clay ceramic

In the ceramic industry, burning of pore-forming agents in clay materials during firing leads to the emission of pollutant volatile organic compounds (VOC). Afterburning of such kinds of organics in a separate carbonization chamber for tunnel kilns is a possible solution for their further transformation into non-polluting species (H2O, CO2, …). However, this requires important investments to be made in relation to major kiln modifications. Therefore, in this paper, we propose an alternative method of organic conversion through the addition of oxidizing agents such as peroxide and dioxide in the raw materials.