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The simultaneous effect of graphene oxide and sodium dodecyl sulphate nanoparticles on the kinetics of CO2 absorption in amine

机译：氧化石墨烯和十二烷基硫酸钠纳米粒子同时对胺中CO2吸收动力学的影响

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Amine solvents are extensively used on an industrial scale for removing carbon dioxide (CO2). The presence of some additives in amine solvents has a desirable effect on CO2 absorption kinetics and also improves the absorption process. In this study, graphene oxide (GO) nanoparticles and the anionic surfactant sodium dodecyl sulphate (SDS) were used as additives to the amine solvent. The number of CO2 moles that were used (ng), the values of the diffusion coefficient (DAB), and the mass transfer coefficients of CO2 gas absorption in the amine solvent (Kc) were determined. Furthermore, the effect of the additives on the kinetics of CO2 gas absorption in the amine solvent was investigated. The results showed that mass transfer coefficients increased with a decrease in pressure and an increase in temperature as well as in the SDS and GO concentrations. The values of the mass transfer coefficient under different conditions varied between 0.0311 and 0.0587 cm/s. The molecular diffusion coefficient of CO2 in the amine solvent increased from 0.000025 to 0.000287 cm2/s with decreases in the pressure and with increases in the temperature and increases in concentrations of additives. The laboratory data were statistically analyzed via Design-Expert software using response surface experiment design and a historical method. A mathematical relation was proposed to estimate the mass transfer coefficients. Moreover, a mathematical relation was introduced to predict the molecular diffusion coefficient of CO2 in the amine solvent.
机译：胺溶剂在工业规模上被广泛用于去除二氧化碳（CO2）。胺溶剂中某些添加剂的存在对CO2吸收动力学具有理想的影响，并且还改善了吸收过程。在这项研究中，氧化石墨烯（GO）纳米粒子和阴离子表面活性剂十二烷基硫酸钠（SDS）被用作胺溶剂的添加剂。确定所用的CO2摩尔数（ng），扩散系数（DAB）的值以及胺溶剂（Kc）中CO2气体吸收的传质系数。此外，研究了添加剂对胺溶剂中CO2气体吸收动力学的影响。结果表明，传质系数随着压力的降低和温度的升高以及SDS和GO浓度的增加而增加。在不同条件下的传质系数值在0.0311和0.0587 cm / s之间变化。随着压力的降低，温度的升高和添加剂浓度的增加，胺溶剂中的CO2分子扩散系数从0.000025增加到0.000287 cm2 / s。使用响应面实验设计和历史方法，通过Design-Expert软件对实验室数据进行统计分析。提出了一种数学关系式来估计传质系数。此外，引入了数学关系式来预测胺溶剂中CO2的分子扩散系数。

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