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Sensors 2015, 15(10), 27273-27282;

In-Line Measurement of Water Contents in Ethanol Using a Zeolite-Coated Quartz Crystal Microbalance

Department of Advanced Materials and Chemical Engineering, Kyungnam College of Information & Technology, Pusan 617-701, Korea
Department of Chemical Engineering, University of Hyogo, Himeji 671-2201, Japan
Department of Chemical Engineering, Dong-A University, Pusan 604-714, Korea
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 5 September 2015 / Revised: 22 October 2015 / Accepted: 23 October 2015 / Published: 27 October 2015
(This article belongs to the Section Chemical Sensors)
Full-Text   |   PDF [4877 KB, uploaded 27 October 2015]   |  


A quartz crystal microbalance (QCM) was utilized to measure the water content in ethanol. For the improvement of measurement sensitivity, the QCM was modified by applying zeolite particles on the surface with poly(methyl methacrylate) (PMMA) binder. The measurement performance was examined with ethanol of 1% to 5% water content in circulation. The experimental results showed that the frequency drop of the QCM was related with the water content though there was some deviation. The sensitivity of the zeolite-coated QCM was sufficient to be implemented in water content determination, and a higher ratio of silicon to aluminum in the molecular structure of the zeolite gave better performance. The coated surface was inspected by microscopy to show the distribution of zeolite particles and PMMA spread. View Full-Text
Keywords: quartz crystal microbalance; ethanol dehydration; zeolite-coated sensor quartz crystal microbalance; ethanol dehydration; zeolite-coated sensor

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Kim, B.C.; Yamamoto, T.; Kim, Y.H. In-Line Measurement of Water Contents in Ethanol Using a Zeolite-Coated Quartz Crystal Microbalance. Sensors 2015, 15, 27273-27282.

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