Emission of NO2 from the combustion process of wet wood and bark

This paper presents the analysis of nitrogen volume in wood and bark of some coniferous and broadleaved species. It also specifies the concentration values of nitrogen oxides in exhaust gases created by low-temperature oxidation of fuel nitrogen in the combustion process of wet wood and bark in grate furnaces of thermal generators. The average mass fraction of nitrogen in wood of coniferous species is n = 0.03 % and in wood of hard broadleaved species it is n = 0.16 %. The mass fraction of nitrogen in bark is higher than in wood. The average abundance of nitrogen in bark of coniferous species is n = 0.4 % and in bark of broadleaved species it is n = 0.76 %. Difference has been recorded between the concentration of nitrogen oxides expressed as NO2 in dry exhaust gases when coming from the combustion process of wet wood and bark. While the concentration of NO2 in dry exhaust gases from the combustion process of coniferous wood species is in the range kNO2 = 61 - 81 mg/m3 n,11% and broadleaved wood species kNO2 = 263 - 405 mg/m3 n,11%, the concentration of nitrogen oxides in exhaust gases from combustion of bark is in the range kNO2 = 707 - 2270 mg/m3 n,11%.