Abstract
The exploration of the vapor–solid adsorption mechanism based on goodness-of-fit kinetic models raises many doubts because most of them do not consider the influence of adsorbent heterogeneity on the adsorption kinetics. Thus, results should be verified by independent studies. In this work, the mechanism of propan-2-ol (IPA) vapor adsorption on BPL 4 × 6 activated carbon was investigated using static gravimetric and column studies. Several kinetic and simplified dynamic models were used to fit experimental data. It was shown that the pseudo-second-order model provided the best agreement with the kinetic data at 0.5 g m−3, while the double-exponential model was better at higher concentrations which indicated a complex adsorption mechanism. The Yoon–Nelson and Thomas models well predicted breakthrough curves, and the overall mass transfer coefficients were approximately an order of magnitude lower than the adsorption rates determined from the kinetic models. FTIR analysis showed that the increase in IPA loading caused a change in carbon surface chemistry. This phenomenon was most pronounced at low surface coverage, suggesting that specific interactions between adsorbate and surface oxygen groups affected the process mechanism, the adsorbent capacity, and regenerability. This is in line with the results of thermodynamic studies.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
