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CO2 absorption intensification using novel DEAB amine-based nanofluids of CNT and SiO2 in membrane contactor
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2020-02-10 , DOI: 10.1016/j.cep.2020.107848
Majid Saidi

Recent developments in nanotechnology have a great impact to improve the mass transfer in gas-liquid systems. The effect of nanoparticles was taken into account considering Grazing effect and Brownian motion as main phenomena of mass transfer enhancement in nanofluids. In the present study, a sensitivity analysis was performed to evaluate the influence of nanoparticles on the CO2 absorption inside a hollow fiber membrane contactor (HFMC). The distilled water and chemical system of 4-diethylamino-2-butanol (DEAB)-water nanofluid for CO2 absorption was studied. The considered drops were nanofluids containing carbon nanotube (CNT) and nanosilica (SiO2). A rigorous two-dimensional mathematical model for CO2 absorption from a N2/CO2 gas mixture was developed. The predicted results indicated that the injection of nanoparticles to distilled water and DEAB amine solution improves the CO2 absorption efficiency. Nanofluid of CNT represented better separation performance than nanosilica. Also, the CO2 absorption efficiency of nanofluids was enhanced with the increasing amine and nanoparticle concentration, liquid flow rate and also, decreasing the gas flow rate. Although increasing the liquid temperature decreased the physical absorption of CO2, it enhanced the chemical absorption of CO2 due to improvement of the reaction rates and diffusion coefficients.



中文翻译:

使用新型DEAB胺基纳米流体CNT和SiO 2在膜接触器中增强CO 2吸收

纳米技术的最新发展对改善气液系统中的传质有很大的影响。考虑了纳米粒子的影响,考虑到掠食效应和布朗运动是纳米流体中传质增强的主要现象。在本研究中,进行了敏感性分析,以评估纳米粒子对中空纤维膜接触器(HFMC)内部CO 2吸收的影响。研究了蒸馏水和4-二乙氨基-2-丁醇(DEAB)-水纳米流体对CO 2吸收的化学体系。所考虑的液滴是包含碳纳米管(CNT)和纳米二氧化硅(SiO 2)的纳米流体。N 2吸收CO 2的严格二维数学模型开发了/ CO 2气体混合物。预测结果表明,将纳米颗粒注入蒸馏水和DEAB胺溶液可提高CO 2吸收效率。CNT的纳米流体表现出比纳米二氧化硅更好的分离性能。同样,随着胺和纳米粒子浓度的增加,液体流速的增加以及气体流速的降低,纳米流体的CO 2吸收效率也得到了提高。尽管升高液体温度降低了CO 2的物理吸收,但是由于反应速率和扩散系数的提高,其提高了CO 2的化学吸收。

更新日期:2020-02-10
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