Sulfation of Condensed Potassium Chloride by SO2

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• 作者：Louise With Sengel酶v ; Troels Bruun Hansen ; Carmen Bartolom茅 ; Hao Wu ; Kim H. Pedersen ; Flemming J. Frandsen ; Anker D. Jensen ; Peter Glarborg
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：June 20, 2013
• 年：2013
• 卷：27
• 期：6
• 页码：3283-3289
• 全文大小：407K
• 年卷期：v.27,no.6(June 20, 2013)
• ISSN：1520-5029

文摘

The interaction between alkali chloride and sulfur oxides has important implications for deposition and corrosion in combustion of biomass. In the present study, the sulfation of particulate KCl (90鈥?25 渭m) by SO₂ was studied in a fixed bed reactor in the temperature range 673鈥?023 K and with reactant concentrations of 500鈥?000 ppm SO₂, 1鈥?0% O₂, and 4鈥?5% H₂O. The degree of sulfation was monitored by measuring the formation of HCl. Analysis of the solid residue confirmed that the reaction proceeds according to a shrinking core model and showed the formation of an eutectic at higher temperatures. On the basis of the experimental results, a rate expression for the sulfation reaction was derived. The model compared well with literature data for sulfation of KCl and NaCl, and the results indicate that it may be applied at even higher SO₂ concentrations and temperatures than those of the present study. Simulations of sulfation of KCl particles with different size indicate that only for very small KCl particles, below 1 渭m, a considerable in-flight sulfation is achievable at the short gas residence times typical of combustion systems.