The Simultaneous Effect of Graphene Oxide and Sodium Dodecyl Sulphate Nanoparticles on the Kinetics of Co2absorptionin Amine Solvent

Amine solvents are extensively used on an industrial scale for removingcarbon dioxide (co2).the presence of some additives in amine solvents has a desirable effect on co2absorption 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 co2moles that were used (ng), the values of the diffusion coefficient (dab), and the mass transfer coefficients of co2gas absorption in the amine solvent (kc) were determined. furthermore, the effect of the additives on the kinetics of co2gas 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 0.0587cm/s. the molecular diffusion coefficient of co2in the amine solvent increased from 0.000025 to 0.000287cm^2/swith 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 co2in the amine solvent.