| 摘要 |
<p>PURPOSE:To ignite natural gas at low temperature and increase the temperature of ignited gas up to 750-1,000 deg.C by a method wherein a catalyst layer having as active component palladium and platinum is arranged at a front stage and another catalyst layer having as an active component a platinum is arranged at a rear stage in respect to a flow of fuel-air mixture gas. CONSTITUTION:A catalyst is divided into two layers, each of the catalysts which can be ignited at a relative low temperature applied in a front stage layer and a high combustible catalyst to be applied in a rear stage layer in which a combustion gas temperature can be increased up to 750-1,000 deg.C is properly designed. As the catalyst to be used in the front stage layer, the active component is composed of palladium and platinum, the catalyst to be applied in the rear stage layer is composed of platinum as an active component and they are prevented from being over a high temperature of more than 1,000 deg.C. As a result, it becomes possible to ignite methane or natural gas fuel having as its major component methane at a low temperature and to raise the combustion gas up to a temperature of 750-1,000 deg.C and it is possible to continue its performance for a long period of time.</p> |
