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Fast-growing grass, as a popular renewable energy, is low in sulfur content, so NO  x   is the major pollutant during its combustion. To study the emission characteristics of NO  x   and obtain the data of controlling NO  x   emission, the effects of combustion temperature as well as the additive type and mass fraction were investigated on the emission characteristics of NO  x   from the combustion of fast-growing grass. Results revealed that the first peak for NO  x   emission from this combustion gradually increases with an increase in temperature. Moreover, the additives were found to dramatically impact the amount of NO  x   emission and its representative peak. The optimal additives and their optimal mass fractions were determined at various specific temperatures to reduce NO  x   emission. At combustion temperatures of 600, 700, 750, 800, and 850°C, the optimal conditions to limit NO  x   emissions were 5% SiO 2 , 3% Al 2 O 3 , 3% Ca(OH) 2 , 15% Al 2 O 3 , and 3% SiO 2  (or 3% Al 2 O 3 ), respectively; the corresponding emission peaks decreased by 43.59, 44.21, 47.99, 24.18, and 30.60% (or 31.51%), with denitration rates of 63.28, 50.34, 57.44, 27.05, and 27.34% (or 27.28%), respectively.

Effects of Temperature and Additives on NOx Emission From Combustion of Fast-Growing Grass