Possible Causes of the Variability of FBC Ash Behaviour
Three lots of ash from a small bubbling fluidized bed combustor, each made up of three fractions and two lots of ash from a large industrial scale circulating fluidized bed installation were examined. Limestone sorbents were used in both cases. Ash samples were subjected to phase analysis "as r...
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| Veröffentlicht in: | Combustion science and technology 2000-04, Vol.153 (1), p.141-155 |
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| creator | BULEWICZ, E.M. DUDEK, K. GÓRA, D. TARASZKA, J. |
| description | Three lots of ash from a small bubbling fluidized bed combustor, each made up of three fractions and two lots of ash from a large industrial scale circulating fluidized bed installation were examined. Limestone sorbents were used in both cases. Ash samples were subjected to phase analysis "as received" and after prehydration at ambient conditions and under pressure. Determinations of the proportion of free CaO were also made for selected samples, including some to which a controlled amount of CaO or silica had been added before hydration. When possible, the thermal effect associated with mixing the samples with an excess of water was measured. It was concluded that during the prehydration process CaO can be liberated from Ca-containing coal ash components but it can also be consumed in reactions with silica or silicates. These processes can affect the exothermicity. |
| doi_str_mv | 10.1080/00102200008947256 |
| format | Article |
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Limestone sorbents were used in both cases. Ash samples were subjected to phase analysis "as received" and after prehydration at ambient conditions and under pressure. Determinations of the proportion of free CaO were also made for selected samples, including some to which a controlled amount of CaO or silica had been added before hydration. When possible, the thermal effect associated with mixing the samples with an excess of water was measured. It was concluded that during the prehydration process CaO can be liberated from Ca-containing coal ash components but it can also be consumed in reactions with silica or silicates. These processes can affect the exothermicity.</description><subject>Applied sciences</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</subject><subject>Exact sciences and technology</subject><subject>fluidized bed ash</subject><subject>free lime</subject><subject>Furnaces. Firing chambers. 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Thermal use of fuels</topic><topic>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</topic><topic>Exact sciences and technology</topic><topic>fluidized bed ash</topic><topic>free lime</topic><topic>Furnaces. Firing chambers. Burners</topic><topic>hydration</topic><topic>silicates</topic><topic>Solid and pulverized fuel burners and combustion chambers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>BULEWICZ, E.M.</creatorcontrib><creatorcontrib>DUDEK, K.</creatorcontrib><creatorcontrib>GÓRA, D.</creatorcontrib><creatorcontrib>TARASZKA, J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Combustion science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>BULEWICZ, E.M.</au><au>DUDEK, K.</au><au>GÓRA, D.</au><au>TARASZKA, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Possible Causes of the Variability of FBC Ash Behaviour</atitle><jtitle>Combustion science and technology</jtitle><date>2000-04-01</date><risdate>2000</risdate><volume>153</volume><issue>1</issue><spage>141</spage><epage>155</epage><pages>141-155</pages><issn>0010-2202</issn><eissn>1563-521X</eissn><coden>CBSTB9</coden><abstract>Three lots of ash from a small bubbling fluidized bed combustor, each made up of three fractions and two lots of ash from a large industrial scale circulating fluidized bed installation were examined. Limestone sorbents were used in both cases. Ash samples were subjected to phase analysis "as received" and after prehydration at ambient conditions and under pressure. Determinations of the proportion of free CaO were also made for selected samples, including some to which a controlled amount of CaO or silica had been added before hydration. When possible, the thermal effect associated with mixing the samples with an excess of water was measured. It was concluded that during the prehydration process CaO can be liberated from Ca-containing coal ash components but it can also be consumed in reactions with silica or silicates. These processes can affect the exothermicity.</abstract><cop>London</cop><pub>Taylor & Francis Group</pub><doi>10.1080/00102200008947256</doi><tpages>15</tpages></addata></record> |
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| ispartof | Combustion science and technology, 2000-04, Vol.153 (1), p.141-155 |
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| source | Taylor & Francis Journals Complete |
| subjects | Applied sciences Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology fluidized bed ash free lime Furnaces. Firing chambers. Burners hydration silicates Solid and pulverized fuel burners and combustion chambers |
| title | Possible Causes of the Variability of FBC Ash Behaviour |
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