Abstract
On the gasification of nitrogen-rich fuel the nitrogen from the fuel goes into the gas phase in the form of ammonia and hydrogen cyanide and also nitrogen containing tars. When the gas is combusted the nitrogen compounds are oxidized to a great extent to NO{sub x} and, therefore, high NO{sub x} emissions can be found on the combustion of low heating value gas produced from energy forest wood chips as is also the case with direct combustion of nitrogen rich fuels. An experimental study has been carried out where the important parameters for designing a combustion chamber for low heating value gases have been studied in order to obtain maximum reduction of NO{sub x} emissions. The effect of tar cracking using dolomite on these emissions and the effect of parameters such as the addition of steam has also been tested. The tests were carried out with energy forest wood chips with 0.3% nitrogen. The gasification was carried out in a pyrolysis reactor, operated to yield a low heating value gas, and which was coupled to a simplified gas turbine combustion chamber at atmospheric pressure. The results show that the main part of the nitrogen in the fuel is found as
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Citation Formats
Gustafsson, R, Oskarsson, J, and Waldheim, L.
Reduction of NO{sub x} emissions when burning low heating value gas; Minskning av NO{sub x}-emissioner i samband med foerbraenning av laagvaerdesgas.
Sweden: N. p.,
1993.
Web.
Gustafsson, R, Oskarsson, J, & Waldheim, L.
Reduction of NO{sub x} emissions when burning low heating value gas; Minskning av NO{sub x}-emissioner i samband med foerbraenning av laagvaerdesgas.
Sweden.
Gustafsson, R, Oskarsson, J, and Waldheim, L.
1993.
"Reduction of NO{sub x} emissions when burning low heating value gas; Minskning av NO{sub x}-emissioner i samband med foerbraenning av laagvaerdesgas."
Sweden.
@misc{etde_10142841,
title = {Reduction of NO{sub x} emissions when burning low heating value gas; Minskning av NO{sub x}-emissioner i samband med foerbraenning av laagvaerdesgas}
author = {Gustafsson, R, Oskarsson, J, and Waldheim, L}
abstractNote = {On the gasification of nitrogen-rich fuel the nitrogen from the fuel goes into the gas phase in the form of ammonia and hydrogen cyanide and also nitrogen containing tars. When the gas is combusted the nitrogen compounds are oxidized to a great extent to NO{sub x} and, therefore, high NO{sub x} emissions can be found on the combustion of low heating value gas produced from energy forest wood chips as is also the case with direct combustion of nitrogen rich fuels. An experimental study has been carried out where the important parameters for designing a combustion chamber for low heating value gases have been studied in order to obtain maximum reduction of NO{sub x} emissions. The effect of tar cracking using dolomite on these emissions and the effect of parameters such as the addition of steam has also been tested. The tests were carried out with energy forest wood chips with 0.3% nitrogen. The gasification was carried out in a pyrolysis reactor, operated to yield a low heating value gas, and which was coupled to a simplified gas turbine combustion chamber at atmospheric pressure. The results show that the main part of the nitrogen in the fuel is found as ammonia in the low heating value gas. With this type of gasification the conversion of fuel nitrogen to ammonia in the gas is equivalent to 500-600 mg/MJ, calculated as NO{sub 2}. Only very low amounts of hydrogen cyanide have been noted and no nitrogen containing tar components have been found. No apparent effect of steam additions has been noted. On the other hand the distribution of air in the combustion chamber and residence time during the under stoichiometric conditions are of great importance for the NO{sub x} reduction. Depending on the air distribution the emissions of NO{sub 2} varied between 100 and 250 mg/MJ, calculated as NO{sub 2}. 23 refs, 11 figs, 2 tabs}
place = {Sweden}
year = {1993}
month = {Sep}
}
title = {Reduction of NO{sub x} emissions when burning low heating value gas; Minskning av NO{sub x}-emissioner i samband med foerbraenning av laagvaerdesgas}
author = {Gustafsson, R, Oskarsson, J, and Waldheim, L}
abstractNote = {On the gasification of nitrogen-rich fuel the nitrogen from the fuel goes into the gas phase in the form of ammonia and hydrogen cyanide and also nitrogen containing tars. When the gas is combusted the nitrogen compounds are oxidized to a great extent to NO{sub x} and, therefore, high NO{sub x} emissions can be found on the combustion of low heating value gas produced from energy forest wood chips as is also the case with direct combustion of nitrogen rich fuels. An experimental study has been carried out where the important parameters for designing a combustion chamber for low heating value gases have been studied in order to obtain maximum reduction of NO{sub x} emissions. The effect of tar cracking using dolomite on these emissions and the effect of parameters such as the addition of steam has also been tested. The tests were carried out with energy forest wood chips with 0.3% nitrogen. The gasification was carried out in a pyrolysis reactor, operated to yield a low heating value gas, and which was coupled to a simplified gas turbine combustion chamber at atmospheric pressure. The results show that the main part of the nitrogen in the fuel is found as ammonia in the low heating value gas. With this type of gasification the conversion of fuel nitrogen to ammonia in the gas is equivalent to 500-600 mg/MJ, calculated as NO{sub 2}. Only very low amounts of hydrogen cyanide have been noted and no nitrogen containing tar components have been found. No apparent effect of steam additions has been noted. On the other hand the distribution of air in the combustion chamber and residence time during the under stoichiometric conditions are of great importance for the NO{sub x} reduction. Depending on the air distribution the emissions of NO{sub 2} varied between 100 and 250 mg/MJ, calculated as NO{sub 2}. 23 refs, 11 figs, 2 tabs}
place = {Sweden}
year = {1993}
month = {Sep}
}