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J Hazard Mater

Title:		Micro gas preconcentrator using metal organic framework embedded metal foam for detection of low-concentration volatile organic compounds
Author(s):		Lee J; Lee J; Lim SH;
Address:		"Department of Mechanics and Design, Kookmin University, Seoul 02707, South Korea. School of Mechanical Engineering, Kookmin University, Seoul 02707, South Korea. Electronic address: shlim@kookmin.ac.kr"
Journal Title:		J Hazard Mater
Year:		2020
Volume:		20200207
Issue:
Page Number:		122145 -
DOI:		10.1016/j.jhazmat.2020.122145
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Analysis of volatile organic compounds (VOCs) is essential for on-site environmental monitoring and toxic chemicals detection. However, quantitatively detecting VOC gases is difficult because of their low gas concentration (<100 ppb), and preconcentration is necessary to overcome the detection limitations of various gas sensors. Many studies on micro preconcentrators (mu-PC) have been reported, however, these devices suffer from high desorption temperatures and significant pressure drops, which degrade sensing ability and increase operating costs, respectively. Due to these disadvantages, such devices are not yet commercially available. In this study, a mu-PC was developed using metal organic framework embedded metal foam (MOFM) as an adsorbent. The preconcentration performance of the mu-PC was evaluated based on several key parameters, such as desorption temperature, adsorption time, and initial sample concentration. In addition, the MOFM and commercial adsorbents were each packed in the same mu-PC chip, respectively, to compare their preconcentration and pressure drop performances. The MOFM-adsorbent-packed mu-PC demonstrated the preconcentration factors were 2.6 and 4 times higher, and the pressure drops were 4 and 3 times lower than those of the commercial adsorbents under the same conditions owing to the high specific surface area and the efficient flow distribution of the MOFM adsorbent"
Keywords:		Environmental monitoring Gas preconcentration Toxic chemicals VOCs adsorbents;
Notes:		"PubMed-not-MEDLINELee, Janghyeon Lee, Junsuk Lim, Si-Hyung eng Research Support, Non-U.S. Gov't Netherlands 2020/02/20 J Hazard Mater. 2020 Jun 15; 392:122145. doi: 10.1016/j.jhazmat.2020.122145. Epub 2020 Feb 7"