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首页> 外文期刊>International Journal of Heat and Mass Transfer >CO_2 absorption enhancement by nanoabsorbents in Taylor-Couette absorber
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CO_2 absorption enhancement by nanoabsorbents in Taylor-Couette absorber

机译：Taylor-Couette吸收器中纳米吸收剂增强了CO_2吸收

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摘要

CO_2 gas is physically absorbed in liquid methanol in bubbly Taylor-Couette absorber. The experiments are performed in the turbulent regime with rotational Reynolds numbers ranging from 1.9 × 10~4 to 19.2 × 10~4. The volumetric mass transfer coefficients are obtained for the counter-current operation. Methanol is utilized as the base absorbent. In addition, with the purpose of enhancing CO_2 absorption performance, Al_2O_3 nanoparticles are combined with methanol to produce the absorbent. The results show an increase in the volumetric mass transfer coefficient that reaches a maximum value at 4 × 10~4 rotational Reynolds number for both pure methanol and the nanoabsorbents, after which the absorption rate declines almost linearly with the rotational speed. The reasons for the reduction in the absorption performance are discussed. The maximum enhancement in the volumetric mass transfer coefficient is estimated at 20% for 4 × 10~4 rotational Reynolds number and up to 27% for methanol and Al_2O_3 nanoparticles at a concentration of 0.1 vol%.
机译：在起泡的Taylor-Couette吸收器中，CO_2气体被物理吸收在液态甲醇中。实验在湍流条件下进行，旋转雷诺数范围从1.9×10〜4到19.2×10〜4。获得用于逆流操作的体积传质系数。甲醇用作基础吸收剂。另外，为了增强CO_2的吸收性能，将Al_2O_3纳米颗粒与甲醇结合以制备吸收剂。结果表明，纯甲醇和纳米吸收剂的体积传质系数均在4×10〜4旋转雷诺数时达到最大值，此后吸收率几乎随转速线性下降。讨论了吸收性能降低的原因。对于4×10〜4旋转雷诺数，体积传质系数的最大增强估计为20％，对于浓度为0.1 vol％的甲醇和Al_2O_3纳米粒子，其最大传质系数可达27％。

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