Abstract
Three fuels (two bark/wood chips fuels and one straw fuel) and the ashes from the combustion of these fuels in a laboratory fixed bed furnace were studied with regard to element content, crystalline compounds, sintering and melting temperatures. The ashes of the two bark/wood chips fuels contain less potassium and silicon and more calcium than ashes of the straw fuel. The content of potassium is lower than in the original fuel and the content of calcium higher for all fuels. Ashes of the bark/wood chips fuels from substoichiometric experiments showed a higher content of calcium and a lower content of silicon than the ashes from over-stoichiometric experiments. This behaviour could not be seen for the straw ashes. Even though part of the potassium probably leaves the fuel bed as gaseous compounds, there is still enough in the straw ashes to cause sintering problems. The straw ashes melted at about 970 deg C, while the two bark/wood ashes melted at 1465 and 1480 deg C respectively. The combustion temperature was about 1000-1100 deg C for the straw fuel and 1100-1200 deg C for the two bark/wood chips fuels. The main crystalline compounds found were CaCO{sub 3}, CaO, SiO{sub 2}, KCl, K{sub
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Olanders, B;
Steenari, B M
[1]
- Chalmers Univ. of Technology and Gothenburg Univ. (Sweden). Dept. of Inorganic Chemistry
Citation Formats
Olanders, B, and Steenari, B M.
Characterization of ashes from wood and straw.
Sweden: N. p.,
1992.
Web.
Olanders, B, & Steenari, B M.
Characterization of ashes from wood and straw.
Sweden.
Olanders, B, and Steenari, B M.
1992.
"Characterization of ashes from wood and straw."
Sweden.
@misc{etde_10132715,
title = {Characterization of ashes from wood and straw}
author = {Olanders, B, and Steenari, B M}
abstractNote = {Three fuels (two bark/wood chips fuels and one straw fuel) and the ashes from the combustion of these fuels in a laboratory fixed bed furnace were studied with regard to element content, crystalline compounds, sintering and melting temperatures. The ashes of the two bark/wood chips fuels contain less potassium and silicon and more calcium than ashes of the straw fuel. The content of potassium is lower than in the original fuel and the content of calcium higher for all fuels. Ashes of the bark/wood chips fuels from substoichiometric experiments showed a higher content of calcium and a lower content of silicon than the ashes from over-stoichiometric experiments. This behaviour could not be seen for the straw ashes. Even though part of the potassium probably leaves the fuel bed as gaseous compounds, there is still enough in the straw ashes to cause sintering problems. The straw ashes melted at about 970 deg C, while the two bark/wood ashes melted at 1465 and 1480 deg C respectively. The combustion temperature was about 1000-1100 deg C for the straw fuel and 1100-1200 deg C for the two bark/wood chips fuels. The main crystalline compounds found were CaCO{sub 3}, CaO, SiO{sub 2}, KCl, K{sub 2}SO{sub 4} and MgO. KCl and K{sub 2}SO{sub 4} was clearly found in the ashes from straw but only traces in the ashes from the bark/wood chips fuels. CaCO{sub 3} was present in ashes prepared at 400 deg C and was converted to CaO when the ashes were heated above that temperature. Also calcium silicates, potassium calcium silicate and calcium magnesium silicate were found. All potassium containing compounds detected have low melting temperatures, which can be an explanation for the sintering tendency of the straw ashes. The crystalline compounds found in the ashes are examples of the compounds which can form during the combustion of biomass fuels and also, possibly act as catalytic substance for NO reduction. (authors) (15 refs., 7 figs., 9 tabs.).}
place = {Sweden}
year = {1992}
month = {Jun}
}
title = {Characterization of ashes from wood and straw}
author = {Olanders, B, and Steenari, B M}
abstractNote = {Three fuels (two bark/wood chips fuels and one straw fuel) and the ashes from the combustion of these fuels in a laboratory fixed bed furnace were studied with regard to element content, crystalline compounds, sintering and melting temperatures. The ashes of the two bark/wood chips fuels contain less potassium and silicon and more calcium than ashes of the straw fuel. The content of potassium is lower than in the original fuel and the content of calcium higher for all fuels. Ashes of the bark/wood chips fuels from substoichiometric experiments showed a higher content of calcium and a lower content of silicon than the ashes from over-stoichiometric experiments. This behaviour could not be seen for the straw ashes. Even though part of the potassium probably leaves the fuel bed as gaseous compounds, there is still enough in the straw ashes to cause sintering problems. The straw ashes melted at about 970 deg C, while the two bark/wood ashes melted at 1465 and 1480 deg C respectively. The combustion temperature was about 1000-1100 deg C for the straw fuel and 1100-1200 deg C for the two bark/wood chips fuels. The main crystalline compounds found were CaCO{sub 3}, CaO, SiO{sub 2}, KCl, K{sub 2}SO{sub 4} and MgO. KCl and K{sub 2}SO{sub 4} was clearly found in the ashes from straw but only traces in the ashes from the bark/wood chips fuels. CaCO{sub 3} was present in ashes prepared at 400 deg C and was converted to CaO when the ashes were heated above that temperature. Also calcium silicates, potassium calcium silicate and calcium magnesium silicate were found. All potassium containing compounds detected have low melting temperatures, which can be an explanation for the sintering tendency of the straw ashes. The crystalline compounds found in the ashes are examples of the compounds which can form during the combustion of biomass fuels and also, possibly act as catalytic substance for NO reduction. (authors) (15 refs., 7 figs., 9 tabs.).}
place = {Sweden}
year = {1992}
month = {Jun}
}