Experimental and theoretical insight of nonisothermal adsorption kinetics for a single component adsorbent-adsorbate system

Wai Soong Loh, Anutosh Chakraborty, Bidyut Baran Saha, Kim Choon Ng

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A theoretical framework is proposed to describe the temperature-dependent adsorption kinetics and their interpretation of measured uptake curves of four types of adsorbate, namely, methane and halogenated refrigerants (R134a, R410a, and R507a) onto a pitch-based activated carbon, Maxsorb III. The model requires only two measurable data from the experiments, that is, the adsorbent temperature and system pressure during the adsorption dynamics. We have demonstrated that the temperature dependency adsorption has significant influence on the intrapellet diffusion coefficients of the linear driving force (LDF) model. A modified LDF model is proposed in this paper, and it is validated using the uptake behavior of these adsorbates; good agreement is found between the proposed kinetics model and the experimental uptake. The parameters postulated in the model are consistent and reproducible and agree well with a priori estimates. The model provides a useful theoretical basis for the analysis of rapid sorption processes for which the isothermal approximation is no longer valid.

Original languageEnglish
Pages (from-to)1174-1185
Number of pages12
JournalJournal of Chemical and Engineering Data
Volume57
Issue number4
DOIs
Publication statusPublished - Apr 12 2012

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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