Deactivation model for dry desulphurization of simulated flue gas with calcined limestone in a fluidized-bed reactor

Suyadal, Y.; Erol, Murat; Oguz, H. Kagan

doi:10.1016/j.fuel.2005.03.003

Cited by 13 publications

(18 citation statements)

References 17 publications

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“…Figure 4 shows the conversion-time curves of the two limestones obtained at different temperatures, with particle sizes in the range of 0.1-0.2 mm. As commented by others researchers [25][26][27][28], two different stages can be observed both at direct and indirect sulphation conditions. This is better observed in Figure 5 where the first hours of the sulphation reaction is showed for Granicarb limestone.…”

Section: Effect Of Temperaturementioning

confidence: 66%

Calcium-based sorbents behaviour during sulphation at oxy-fuel fluidised bed combustion conditions

Garcı́a-Labiano

Rufas

Diego

et al. 2011

Fuel

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Section: Effect Of Temperaturementioning

confidence: 66%

Calcium-based sorbents behaviour during sulphation at oxy-fuel fluidised bed combustion conditions

Garcı́a-Labiano

Rufas

Diego

et al. 2011

Fuel

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“…However, as also described by other authors, the desulphurization mechanism can be represented as the sum of Reactions 1 and 2, as expressed by Reaction 3 (Suyadal et al, 2005).…”

Section: Stoichiometric Analysismentioning

confidence: 82%

“…Suyadal et al (2005) explored the SO 2 breakthrough curves in the presence of O 2 , CO 2 , and H 2 O steam and tested one deactivation model description of these curves obtained in an integral fluidized bed reactor.…”

Section: Introductionmentioning

confidence: 99%

Dolomite Desulfurization Behavior in a Bubbling Fluidized Bed Pilot Plant for High Ash Coal

Gomes

Philipssen

Bard

et al. 2016

Braz. J. Chem. Eng.

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-Although fluidized bed in situ desulphurization from coal combustion has been widely studied, there are aspects that remain under investigation. Additionally, few publications address Brazilian coal desulphurization via fluidized beds. This study used a 250 kWth bubbling fluidized bed pilot plant to analyze different aspects of the dolomite desulphurization of two Brazilian coals. Superficial velocities of 0.38 and 0.46 m/s, flue gas recycling, Ca/S molar ratios and elutriation were assessed. Results confirmed the influence of the Ca/S molar ratio and superficial velocity -SO 2 conversion up to 60.5% was achieved for one coal type, and 70.9% was achieved for the other type. A recycling ratio of 54.6% could increase SO 2 conversion up to 86.1%. Elutriation and collection of ashes and Ca-containing products did not present the same behavior because a lower wt. % of CaO was collected by the gas controlled mechanism compared to the ash.

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“…A primeira rota -Rota Iconsidera a formação intermediária de CaSO 3 e, posteriormente, a sua oxidação a CaSO 4 (Yates, 1983;Anthony e Granatstein, 2001). A segunda rota -Rota II -já considera a formação direta do CaSO 4 (Suyadal et al, 2005).…”

Section: Análise Estequiométricaunclassified

“…Alguns autores têm estudado a influência das condições operacionais na dessulfuração, como Tarelho et al (2005), que utilizaram dois tipos de carvão e uma razão molar Ca/S de 3,5, além de excesso de ar de 10, 25 e 50%. Apesar de alguma influência do excesso de ar, a alimentação de ar em estágio mostrou muito maior influência, o que propiciou maior conversão.…”

Section: Introductionunclassified

Estudo Experimental Da Relação Da Dessulfuração Em Leito Fluidizado Borbulhante Com as Condições Fluidodinâmicas

Gomes¹,

Zen²,

Philippsen³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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RESUMO -Algumas questões operacionais que envolvem a dessulfuração em leito fluidizado ainda necessitam do desenvolvimento de um maior conhecimento. Dentre elas, destaca-se a relação existente entre as características fluidodinâmicas de operação com a conversão do SO 2 . Para tanto, este trabalho utilizou uma planta piloto de 250 kW t em leito fluidizado borbulhante para a análise da conversão do SO 2 a CaSO 4 com dois distintos tipos de carvão mineral. Foi realizada uma análise estequiométrica e fluidodinâmica do processo a partir de dados obtidos da emissão de SO 2 nos gases de combustão. A % de conversão de SO 2 chegou a 70,5% para um carvão utilizado e 59,5% para outro carvão. O maior teor de enxofre de um dos carvões mostrou influência na extensão da reação, especificamente no número de mols de SO 2 consumidos por hora. A análise mineralógica mostrou que ocorre uma das rotas descritas na literatura com formação intermediária de CaSO 3 por duas reações em série e a elutriação das cinzas e do CaO mostraram distintas tendências.

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Deactivation model for dry desulphurization of simulated flue gas with calcined limestone in a fluidized-bed reactor

Cited by 13 publications

References 17 publications

Calcium-based sorbents behaviour during sulphation at oxy-fuel fluidised bed combustion conditions

Calcium-based sorbents behaviour during sulphation at oxy-fuel fluidised bed combustion conditions

Dolomite Desulfurization Behavior in a Bubbling Fluidized Bed Pilot Plant for High Ash Coal

Estudo Experimental Da Relação Da Dessulfuração Em Leito Fluidizado Borbulhante Com as Condições Fluidodinâmicas

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