旋轉填充床中醇胺混合深共熔溶劑捕獲二氧化碳與其模擬

張剛耀

doi:10.6840/cycu201700516

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旋转填充床中醇胺混合深共熔溶剂捕获二氧化碳与其模拟

Simulation and Experiment of CO2 Capture by a Mixture of Alkanolamine and Deep Eutectic Solvent in a Rotating Packed Bed

张刚耀 , 硕士　　导师：陈昱劭　　

繁体中文 DOI： 10.6840/cycu201700516

旋转填充床；二氧化碳捕捉；醇胺；化学吸收法； rotating packed packed ； CO2 capture ； alkanolamine ； chemical absorption

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摘要 │ 参考文献 (112) │ 国际计量

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In this study, a mixture of 2-methylethanolamine (MMEA) solution with deep eutectic solvent (DES) of choline chloride (ChCl) and ethylene glycol (EG) was used as an absorbent to capture carbon dioxide from gas stream in a rotating paced bed. The effect of rotating speed, gas flow rate, concentration of alkanolamine and the ratio of DES and water in the absorbent on carbon dioxide removal efficiency (E%), mass transfer coefficient (KGa) was investigated. Additionally, the regeneration energy of absorbent was estimated by Aspen Plus and theoretical method.
Experimental results showed that CO2 removal efficiency increased with increasing concentration of alkanolamine and rotating speed ranging between 600 and 1800 rpm, but decreased with increasing gas flow rate. Moreover, adding 30wt% DES in 60wt% MMEA solution could effectively enhance CO2 removal efficiency. Calculated results showed that specific regeneration energy of Aspen Plus and theoretical method is approximate. Specific regeneration energy decreased with increasing concentration of alkanolamine and DES.
In this study, an optimum composition of absorbent of 60wt% MMEA/30wt% DES/10wt% H2O was obtained. The removal efficiency and KGa of the proposed absorbent were 93.36 % and 10.5 1/s at gas flow rate of 50 L/min, liquid flow rate of 0.1 L/min, temperature of 50°C and rotating speed of 2400 rpm. Compared with 30wt% MEA solution, the removal efficiency and KGa of the proposed absorbent were increased from 68% to 93.36% and 3.51 to 10.5 1/s while the regeneration energy can be reduced from 3.57 GJ/ton CO2 to 2.09 GJ/ton CO2. This result shows that MMEA solution mixed with DES has a great potential for CO2 capture process in a RPB.

参考文献 ( 112 ) 〈TOP〉

Abbott, A.P., Al-Barzinjy, A.A., Abbott, P.D., Frisch, G., Harris, R.C., Hartley, J., Ryder, K.S., 2014. Speciation, physical and electrolytic properties of eutectic mixtures based on CrCl3-6H2O and urea,” Physical Chemistry Chemical Physics 16, 9047-9055.
连结：
Abbott, A.P., Barron, J.C., Ryder, K.S., Wilson, D., 2007. Eutectic-Based Ionic Liquids with Metal-Containing Anions and Cations. Chemistry - A European Journal 13, 6495-6501.
连结：
Abbott, A.P., Capper, G., Davies, D.L., Rasheed, R.K., 2004. Ionic Liquids Based upon Metal Halide/Substituted Quaternary Ammonium Salt Mixtures. Inorganic Chemistry 43, 3447-3452.
连结：
Abbott, A.P., Capper, G., Davies, D.L., Rasheed, R.K., Tambyrajah, V., 2003. Novel solvent properties of choline chloride/urea mixtures. Chemical Communication, 70-71.
连结：
Afkhamipour, M., Mofarahi M., 2014. Sensitivity analysis of the rate-based CO2 absorber model using aminesolutions (MEA, MDEA and AMP) in packed columns. International Journal of Greenhouse Gas Control 25, 9-22.
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引用含有DOI的文献

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DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。