Combustión sin Llama de Mezclas Pobres Metano-Aire sobre Óxido de Magnesio Adicionado con Óxido de Calcio.

Active material was prepared using industrial and reactive grade magnesium oxide (MgO) with the addition of calcium oxide (CaO). In a fixed packed bed containing particles of active material, the effects of quantity of CaO added, calcination temperature, space velocity, oxygen excess and reactive mixture composition on activity, measured as percentage of methane conversion, were studied. Complete combustion was reached for compositions under the low limit of inflammability which allow avoiding the formation of thermal NOx. Samples prepared with industrial grade MgO showed similar activity to those prepared with reactive grade MgO with the addition of CaO. The materials, of low cost and easy preparation, showed high thermal stability before and after reaction tests. The properties of the prepared solids make them promising materials for natural gas combustion and gas emission treatment systems. [ABSTRACT FROM AUTHOR]