Abstract
Previous results concerning co-firing of high sulphur fuels with biomass fuels have shown that a significant part of the sulphur can be absorbed in the ash by formation of harmless sulphates. The aim of this work has been to (i) determine the maximum reduction that can be obtained in a bench scaled fluidized bed (5 kW); (ii) determine which operating conditions will give maximum reduction; (iii) point out the importance and applicability of experimental designs and multivariate methods when optimizing combustion processes; (iv) determine if the degree of sulphur capture can be correlated to the degree of slagging, fouling or bed sintering; and (v) determine if further studies are desired. The following are some of the more important results obtained: - By co-firing peat with biomass, a total sulphur retention of 70 % can be obtained. By co-firing coal with energy-grass, the total SO{sub 2} emissions can be reduced by 90 %. - Fuel feeding rate, amount of combustion air and the primary air ratio were the most important operating parameters for the reduction. Bed temperature and oxygen level seem to be the crucial physical parameters. - The NO emissions also decreased by the sulphur reducing measures. The CO emissions
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Nordin, A
[1]
- Umeaa Univ. (Sweden)
Citation Formats
Nordin, A.
Sulphur capture by co-firing sulphur containing fuels with biomass fuels - optimization; Svavelabsorption vid sameldning av svavelinnehaallande braenslen och biobraenslen - optimeringsfoersoek.
Sweden: N. p.,
1992.
Web.
Nordin, A.
Sulphur capture by co-firing sulphur containing fuels with biomass fuels - optimization; Svavelabsorption vid sameldning av svavelinnehaallande braenslen och biobraenslen - optimeringsfoersoek.
Sweden.
Nordin, A.
1992.
"Sulphur capture by co-firing sulphur containing fuels with biomass fuels - optimization; Svavelabsorption vid sameldning av svavelinnehaallande braenslen och biobraenslen - optimeringsfoersoek."
Sweden.
@misc{etde_10148023,
title = {Sulphur capture by co-firing sulphur containing fuels with biomass fuels - optimization; Svavelabsorption vid sameldning av svavelinnehaallande braenslen och biobraenslen - optimeringsfoersoek}
author = {Nordin, A}
abstractNote = {Previous results concerning co-firing of high sulphur fuels with biomass fuels have shown that a significant part of the sulphur can be absorbed in the ash by formation of harmless sulphates. The aim of this work has been to (i) determine the maximum reduction that can be obtained in a bench scaled fluidized bed (5 kW); (ii) determine which operating conditions will give maximum reduction; (iii) point out the importance and applicability of experimental designs and multivariate methods when optimizing combustion processes; (iv) determine if the degree of sulphur capture can be correlated to the degree of slagging, fouling or bed sintering; and (v) determine if further studies are desired. The following are some of the more important results obtained: - By co-firing peat with biomass, a total sulphur retention of 70 % can be obtained. By co-firing coal with energy-grass, the total SO{sub 2} emissions can be reduced by 90 %. - Fuel feeding rate, amount of combustion air and the primary air ratio were the most important operating parameters for the reduction. Bed temperature and oxygen level seem to be the crucial physical parameters. - The NO emissions also decreased by the sulphur reducing measures. The CO emissions were relatively high (130 mg/MJ) compared to large scale facilities due to the small reactor and the small fluctuations in the fuel feeding rate. The SO{sub 2} emissions could however be reduced without any increase in CO emissions. - When the reactor was fired with a grass, the bed sintered at a low temperature (< 880 deg C). However, when co-firing the grass with coal, where K{sub 2}SO{sub 4} and KCl are formed no sintering problems were observed. (27 refs., 41 figs., 9 tabs., 3 appendices).}
place = {Sweden}
year = {1992}
month = {Dec}
}
title = {Sulphur capture by co-firing sulphur containing fuels with biomass fuels - optimization; Svavelabsorption vid sameldning av svavelinnehaallande braenslen och biobraenslen - optimeringsfoersoek}
author = {Nordin, A}
abstractNote = {Previous results concerning co-firing of high sulphur fuels with biomass fuels have shown that a significant part of the sulphur can be absorbed in the ash by formation of harmless sulphates. The aim of this work has been to (i) determine the maximum reduction that can be obtained in a bench scaled fluidized bed (5 kW); (ii) determine which operating conditions will give maximum reduction; (iii) point out the importance and applicability of experimental designs and multivariate methods when optimizing combustion processes; (iv) determine if the degree of sulphur capture can be correlated to the degree of slagging, fouling or bed sintering; and (v) determine if further studies are desired. The following are some of the more important results obtained: - By co-firing peat with biomass, a total sulphur retention of 70 % can be obtained. By co-firing coal with energy-grass, the total SO{sub 2} emissions can be reduced by 90 %. - Fuel feeding rate, amount of combustion air and the primary air ratio were the most important operating parameters for the reduction. Bed temperature and oxygen level seem to be the crucial physical parameters. - The NO emissions also decreased by the sulphur reducing measures. The CO emissions were relatively high (130 mg/MJ) compared to large scale facilities due to the small reactor and the small fluctuations in the fuel feeding rate. The SO{sub 2} emissions could however be reduced without any increase in CO emissions. - When the reactor was fired with a grass, the bed sintered at a low temperature (< 880 deg C). However, when co-firing the grass with coal, where K{sub 2}SO{sub 4} and KCl are formed no sintering problems were observed. (27 refs., 41 figs., 9 tabs., 3 appendices).}
place = {Sweden}
year = {1992}
month = {Dec}
}