How Does Water Presence Affect Methanol Adsorption On Active Carbon? In this paper by M. Rösler et al., it is compared the adsorption properties of several methanol samples with different purity levels and water content, exploring the pressure dependence of kinetic parameters.
Paper title: Adsorption kinetics and equilibria of two methanol samples with different water content on active carbon
Source: M. Rösler, C. Wedler, Adsorption 27 (2021) 1175–1190
Brief description of the scientific article:
The study aimed to investigate the effect of fluid purity on the properties, kinetics, and equilibria of activated carbon adsorption of two different methanol samples with varying water content. The methanol samples used in the experiment had a purity of 98.5% and 99.9%. The researchers conducted measurements at two different temperatures, 298K and 318K, covering a wide range of p/p0.
To determine effective diffusion time constants and mass transfer coefficients, the researchers evaluated the adsorption kinetics using an isothermal and a non-isothermal diffusion model and the linear driving force model. They studied the pressure dependence of the kinetic parameters and discussed their findings.
The results of the experiment showed that the purity of the methanol samples had a small influence on the adsorption equilibria. The purer methanol sample showed slightly higher equilibrium loadings than the less pure sample. However, the researchers observed significantly faster adsorption kinetics for the purer sample at all temperature and pressure conditions. Compared to the less pure sample, the determined effective diffusion time constants and mass transfer coefficients were up to 98% and 35% higher, respectively.
Overall, the findings of the study demonstrate the significant effect of fluid purity on adsorption properties and kinetics. The purer methanol sample had faster adsorption kinetics, which is beneficial for industrial applications that require rapid adsorption processes. The study’s results also highlight the importance of selecting the appropriate model to evaluate adsorption kinetics accurately. Finally, this research can contribute to the development of more efficient adsorption processes for various applications.