Fluidized bed desulfurization using lime obtained after slow calcination of limestone particles
| Autor: | Marco Manca, Aldo Mulas, Paola Meloni, Guido Mulas, Fabrizio Scala, G Carcangiu, Riccardo Chirone |
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| Přispěvatelé: | Scala, Fabrizio, Chirone, Riccardo, Meloni, Paola, Carcangiu, Gianfranco, Manca, Marco, Mulas, Guido, Mulas, Aldo |
| Rok vydání: | 2013 |
| Předmět: |
attrition
Materials science Sorbent General Chemical Engineering Organic Chemistry Metallurgy Energy Engineering and Power Technology Mineralogy Coal combustion products desulfurization engineering.material calcination complex mixtures Flue-gas desulfurization law.invention Fluidized bed Fuel Technology law engineering Calcination Fluidized bed combustion Particle size limestone Lime |
| Zdroj: | International Conference on Coal Science and Technology, pp. paper A66, Oviedo, Spagna, 2011 info:cnr-pdr/source/autori:F. Scala, R. Chirone, P. Meloni, G. Carcangiu, M. Manca, G. Mulas, A. Mulas/congresso_nome:International Conference on Coal Science and Technology/congresso_luogo:Oviedo, Spagna/congresso_data:2011/anno:2011/pagina_da:paper A66/pagina_a:/intervallo_pagine:paper A66 Fuel (Guildf.) 114 (2013): 99–105. doi:10.1016/j.fuel.2012.11.072 info:cnr-pdr/source/autori:F. Scala, R. Chirone, P. Meloni, G. Carcangiu, M. Manca, G. Mulas, A. Mulas/titolo:Fluidized bed desulfurization using lime obtained after slow calcination of limestone particles/doi:10.1016%2Fj.fuel.2012.11.072/rivista:Fuel (Guildf.)/anno:2013/pagina_da:99/pagina_a:105/intervallo_pagine:99–105/volume:114 |
| ISSN: | 0016-2361 |
| Popis: | In this work we have tested the fluidized bed desulfurization performance of lime particles obtained by means of a limestone slow calcination pre-treatment technique. This performance was compared to that of the parent untreated limestone particles. The occurrence of particle fragmentation and attrition during the fluidized bed operation was also investigated with a specific test protocol for both raw limestone and pre-treated lime sorbent. Two particle size ranges were tested under typical fluidized bed coal combustion conditions ( T = 850 °C; SO 2 = 1800 ppm). The experiments were complemented by porosimetric and morphological (SEM) analyses of the sorbent. Results showed that limestone pre-treatment was able to preserve the high mechanical strength of the parent particles as opposed to the fast in situ calcination typically active in fluidized beds. In addition, a high calcium reactivity and final conversion were observed for the pre-treated lime particles, leading to a SO 2 capture capacity per unit mass of sorbent much higher than that obtained with the untreated limestone. Simple economic evaluations suggest that the use of the pre-treated lime in place of limestone can involve significant economies for fluidized bed coal combustor operators. |
| Databáze: | OpenAIRE |
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