Efficiency evaluation of thermally and chemically regenerated activated carbons used in a water cleaning system by acous
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Efficiency evaluation of thermally and chemically regenerated activated carbons used in a water cleaning system by acoustic emission analysis Thayset Mariño Peacok1 · Harold Crespo Sariol1 · Ángel Sánchez Roca2 · Jeamichel Puente Torres3 · Grazyna Gryglewicz4 · Jan Yperman5 · Robert Carleer5 · Dries Vandamme5 · Guy Reggers5 · Kenny Vanreppelen5 · Greet Cuyvers5 · Willem Vercruysse5 · Liset Salomón García6 Accepted: 29 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Acoustic emission analysis (AEA) results for textural characterization of granular activated carbons (GAC) can be related with its porosity. GACs were evaluated using this AEA technique by band-pass filtering from 3.5 to 50 kHz of the sound produced by flooding GAC with water. Used acoustic parameters for evaluation were: area under the signal envelope curve, acoustic energy and power. An exhausted GAC used in a water filter system of engine-based power plant was subjected to thermal and chemical regeneration under different conditions. Acoustic measurement results have been correlated with TGA, XRF, gas adsorption ( N2 at 77 K), GAC stability and elemental analysis for assessing the AEA. Based on all these techniques, it was found that mainly metal ions were adsorbed on the GAC. It was found that chemical regeneration using a 2.4 N HCl solution was the most successful approach in removing the adsorbed metal ions: Ca, Mn and Ba. Using this HCl solution did have the additional benefit in keeping the amount of elemental and fixed carbon almost intact compared to the more diluted HCl solution of 0.6 N and 1.2 N. Keywords Activated carbon · Regeneration · Textural characterization · Acoustic emission · Bubbles
* Jan Yperman [email protected]
Greet Cuyvers [email protected]
Thayset Mariño Peacok [email protected]
Willem Vercruysse [email protected]
Harold Crespo Sariol [email protected]
Liset Salomón García [email protected]
Ángel Sánchez Roca [email protected]
1
Jeamichel Puente Torres [email protected]
Universidad de Oriente, Faculty of Chemical Engineering, Laboratory of Applied Acoustics, Santiago de Cuba, Cuba
2
Grazyna Gryglewicz [email protected]
Universidad de Oriente, Faculty of Mechanical Engineering, Santiago de Cuba, Cuba
3
Robert Carleer [email protected]
Universidad de Oriente, Faculty of Electrical Engineering, Santiago de Cuba, Cuba
4
Wrocław University of Science and Technology, Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Gdanska 7/9, 50–344 Wroclaw, Poland
5
Hasselt University, Research Group of Applied and Analytical Chemistry, Agoralaan Building D, 3590 Diepenbeek, Belgium
6
Electric Union of Cuba Enterprise, Santiago de Cuba, Cuba
Dries Vandamme [email protected] Guy Reggers [email protected] Kenny Vanreppelen [email protected]
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Vol.:(0123456789)
Journal of Porous Materials
1 Introduction A
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