Influence of sorption on sound propagation in granular activated carbon

Venegas, R and Umnova, O 2016, 'Influence of sorption on sound propagation in granular activated carbon' , The Journal of the Acoustical Society of America (JASA), 140 (2) , pp. 755-766.

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Abstract

Granular activated carbon (GAC) has numerous applications due to its ability to adsorb and desorb gas molecules. Recently, it has been shown to exhibit unusually high low frequency sound absorption. This behavior is determined by both the multi-scale nature of the material, i.e., the existence of three scales of heterogeneities, and physical processes specific to micro- and nanometer-size pores, i.e., rarefaction and sorption effects. To account for these processes a model for sound propagation in GAC is developed in this work. A methodology for characterizing GAC which includes optical granulometry, flow resistivity measurements, and the derivation of the inner-particle model parameters from acoustical and non-acoustical measurements is also presented. The model agrees with measurements of normal incidence surface impedance and sound absorption coefficient on three different GAC samples.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: The Journal of the Acoustical Society of America (JASA)
Publisher: Acoustical Society of America
ISSN: 0001-4966
Funders: ORSAS award
Depositing User: O Umnova
Date Deposited: 02 Nov 2016 10:47
Last Modified: 21 Oct 2017 09:30
URI: http://usir.salford.ac.uk/id/eprint/40517

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