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化工学报  2015 

磷石膏强化氨法CO2捕集机理与模型

DOI: 10.11949/j.issn.0438-1157.20150741, PP. 3218-3224

Keywords: 吸收,增强因子,传质,磷石膏颗粒,CO2矿化

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Abstract:

基于化学活性颗粒强化气液吸收机理,建立了磷石膏悬浮液强化氨法烟气CO2捕集模型。以液膜内量纲一传质距离λ*为特征参数,增强因子E=1/λ*+qβλ*/2。用恒温反应器在不同搅拌转速及磷石膏颗粒固含量下实验测定CO2吸收增强因子对模型进行检验,结果表明:随颗粒固含量由5%增加到30%(质量分数),增强因子由1.69增加到2.10;而随搅拌转速从150r·min-1增加到300r·min-1,增强因子仅由1.75略增到1.80,表明磷石膏颗粒固含量及溶解速率是影响增强因子的控制性因素。实验结果与模型预测值吻合良好,偏差小于10%。

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