Experimental Study on Emission Control of Premixed Catalytic Combustion of Natural Gas Using Preheated Air

Abstract

In this paper the premixed catalytic combustion emissions such as CO, unburned hydrocarbon (UHC), NO x and the temperature distribution in the catalytic monolith with ultra low concentration of Pd were studied. Three types of monoliths were used for experiments and the temperature of preheated air was respectively 50 , 100 and 200 . The results show ed that preheated air made radial temperature in the catalytic monolith uniform which helped to avoid local hot spots so as to decrease NO x emission. The experiment also proved that the shorter monolith showed much better catalytic combustion performance than longer one and the temperature at the exit of the shorter monolith was relatively lower. On the contrary, the temperature was higher in the longer monolith and the lethal NO x emission was slightly increased.