Liquid-solid phase countercurrent multi-stage adsorption process for using the Langmuir equation

Journal of Hazardous Materials
Feng-Chin Wu, Ru-Ling Tseng

Abstract

Mass balance and the Langmuir equation were used to deduct the countercurrent multi-stage adsorption process. The relationships between the Langmuir parameter (K(L)y(i)) and the required amounts of adsorbent in countercurrent two-, three- and infinite-stage processes were obtained to find the optimum number of stages as well as the reduction in the adsorbent consumption of the countercurrent multi-stage process of an adsorption system. Pistachio shell activated carbons with BET surface areas of 1013, 1398, and 1919m(2)/g were obtained by KOH activation with CO(2) gasification at gasification times of 0, 10, and 30min. The isotherm adsorption of four adsorbates were investigated and analyzed with the Langmuir equation. The activated carbons studied in this work show compared with other published literatures, the K(L)y(i) and q(mon) values in this work showed excellent adsorption performance. The amount of activated carbon for a countercurrent two- and single stage adsorption operation was calculated, a saving of 66-87% adsorbent was obtained. A simple countercurrent two-stage adsorption system was designed for use in engineering applications.

References

Sep 10, 2003·Journal of Colloid and Interface Science·V K GuptaDinesh Mohan
Feb 27, 2004·Journal of Colloid and Interface Science·Mohamed Mokhtar Mohamed
May 27, 2004·Journal of Environmental Management·Nadia Roostaei, F Handan Tezel
Nov 22, 2005·Journal of Hazardous Materials·K Vasanth Kumar, S Sivanesan
Sep 2, 2006·Journal of Hazardous Materials·Ozgür Aktaş, Ferhan Ceçen

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Citations

Dec 17, 2008·Journal of Agricultural and Food Chemistry·Yingxin YuJiamo Fu

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