NO emission from burning distilled spirit lees with high contents of moisture and nitrogen in fluidized bed

This study was devoted to investigating the NO emission from combusting distilled spirit lees with high contents of moisture and nitrogen in a laboratory fluidized bed. The results showed that the NO emission increased with increasing excess air ratio and combustion temperature. The addition of extra water vapor into the combustion atmosphere for simulating the combustion of high-moisture fuel effectively decreased the NO emission, and about 46% (mass) of NO emission was reduced under appropriate conditions. In the N2-base atmosphere containing CO or H2, the metallic oxides containing in the ash of distilled spirit lees showed obvious catalytic activity on the reduction of NO, and the catalytic activity increased with increasing temperature. Water vapor in itself had not detective effect on reduction of NO, showing that its reduction of NO into N2 would be implemented through its reactions with hydrocarbons to generate reductive gases such as H2 and CO under the catalytic effect of ash. ©, 2015, Chemical Industry Press. All right reserved.