Gas Absorption in Slurries of Fine Particles: SO2-Mg(OH)2-MgSO3 System

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• 作者：Sajan Kakaraniya ; Chandrakala Kari ; Ravish Verma ; Anurag Mehra
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：March 28, 2007
• 年：2007
• 卷：46
• 期：7
• 页码：1904 - 1913
• 全文大小：200K
• 年卷期：v.46,no.7(March 28, 2007)
• ISSN：1520-5045

文摘

The problem of gas absorption with reaction, in a slurry containing fine particles, is important in thedevelopment of processes for the removal of acidic pollutants such as sulfur dioxide. Typically, lime andlime stone slurries can be used for removal of sulfur dioxide. However, magnesium hydroxide slurries mayyield a higher scrubbing capacity as a result of the more soluble reaction product, magnesium sulfite, comparedto the corresponding calcium salt. In this study, absorption experiments were carried out in a stirred cell andthe resulting data is analyzed using the model proposed by Mehra [Chem. Eng. Sci. 1996, 51, 461-477]. Theproposed theory incorporates the process of particle dissolution and the consequent change in particle sizenear the gas-liquid interface, using Higbie's model of mass transfer with chemical reaction. A populationbalance approach is used to track the particle size distribution.