Evaluation of Adsorbents for Removal of Isopropanol from Humid Air#

Tim Taffner*, 1, Bernd Niemeyer1, Angela Puls2, Frieder Dreisbach2
1 Helmut-Schmidt-University, University of the Federal Armed Forces Hamburg, Process Engineering, Holstenhofweg 85, D-22043 Hamburg, Germany
2 Rubotherm GmbH, Universitätsstr, 142, D-44799 Bochum, Germany

© 2012 Taffner et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Helmut-Schmidt-University, University of the Federal Armed Forces, Hamburg, Faculty of Mechanical Engineering, Institute of Thermodynamics, Holstenhofweg 85, 22043 Hamburg, Germany; Tel: +49/406541-2882; Fax: +49/406541-2008; E-mail:


Nowadays sustainable technologies gain in importance. A promising field of activity is the exhaust air treatment by adsorption, especially the removal and recovery of valuable substances like solvents. In this letter three types of adsorbents, being the critical part in technical separation processes by adsorption, are evaluated according to separation of isopropanol from humid air. Isopropanol has been chosen as it is one of the frequently used solvents which need to be separated from humid air in practice. The suitability and performance as well as information about the possible constraints are derived from state of the art measurements and multifaceted analyses of the experimental data. The evaluation is based on physical data, isotherms at different temperatures and for both components, isopropanol and water, as well as on energetic calculations and comparison with values from recent literature.

Keywords: Gas, exhaust, solvent, vapor, adsorption, odor, separation, humidity.