Practical Decomposition Treatment of Halon with Light Burnd Dolomite

摘要

To develop a decomposition processing system of halon that is a destruction compound of ozone layer and also a substance for global warming, the decomposition conditions, composition of reactant, and reaction temperature were investigated. From the examination of ratio of CaO to MgO in the reactant, it was found that the optimum ratio for the decomposition of halon was CaO MgO = 75 : 25. Then, we choose a light burnd dolomite that had the close ratio of the above as a practical reactant. The decomposition efficiency of halon and the decrease of the formation of fureon 116 (hexafluoroethane) that was a by-product in the decomposition process, were investigated by using the reactant. It was found that the decomposition efficiency of halon was over 99.99 percent and the formation of fureon 116 was less than 0.0001 percent in the temperature rangeover 900 deg C. The similar results were obtained in the experiment using a continuous decomposition apparatus equipped with a vertical furnace. A practical decomposition process of halon with light burnt dolomite was established.