Application of Raman spectroscopy in chemical investigation of impregnated activated carbon spent in hydrogen sulfide removal process

Application of Raman spectroscopy in chemical investigation of impregnated activated carbon spent... We present an application of Raman spectroscopy for understanding the chemisorption catalytic processes occurred in impregnated activated carbon used in hydrogen sulfide (H S) adsorption from biogas. Downstream of an H S adsorption 2 2 capacity study, conducted employing commercial carbon at different operating conditions as sorbent in a fixed bed flow reac - tor, spent carbon samples who returned suitable H S removal performances were studied by means of Raman spectroscopy. Raman analysis showed that among all the H S metal impregnates, copper was the chemical responsible for H S adsorption, 2 2 since observed Raman spectra exhibited a perfect overlapping with copper sulfide (CuS) signature. A further confirmation was given by a thermal decomposition test conducted through the Raman optical apparatus over an H S-exposed carbon sample, by estimating anti-Stokes and Stokes Raman processes relative efficiency. Raman results turned out to be consistent with thermogravimetry tests results executed over the same spent carbon samples. The experiment witnesses the capability of Raman spectroscopy to determinate the chemical nature of compounds resulting from H S adsorption, overcoming the lack in chemical information encountered by elemental techniques such as energy-dispersive X-ray. We thus propose Raman spectroscopy as a way to http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Environmental Science and Technology Springer Journals

Application of Raman spectroscopy in chemical investigation of impregnated activated carbon spent in hydrogen sulfide removal process

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Islamic Azad University (IAU)
Subject
Environment; Environment, general; Environmental Science and Engineering; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution; Soil Science & Conservation; Ecotoxicology
ISSN
1735-1472
eISSN
1735-2630
D.O.I.
10.1007/s13762-018-1756-1
Publisher site
See Article on Publisher Site

Abstract

We present an application of Raman spectroscopy for understanding the chemisorption catalytic processes occurred in impregnated activated carbon used in hydrogen sulfide (H S) adsorption from biogas. Downstream of an H S adsorption 2 2 capacity study, conducted employing commercial carbon at different operating conditions as sorbent in a fixed bed flow reac - tor, spent carbon samples who returned suitable H S removal performances were studied by means of Raman spectroscopy. Raman analysis showed that among all the H S metal impregnates, copper was the chemical responsible for H S adsorption, 2 2 since observed Raman spectra exhibited a perfect overlapping with copper sulfide (CuS) signature. A further confirmation was given by a thermal decomposition test conducted through the Raman optical apparatus over an H S-exposed carbon sample, by estimating anti-Stokes and Stokes Raman processes relative efficiency. Raman results turned out to be consistent with thermogravimetry tests results executed over the same spent carbon samples. The experiment witnesses the capability of Raman spectroscopy to determinate the chemical nature of compounds resulting from H S adsorption, overcoming the lack in chemical information encountered by elemental techniques such as energy-dispersive X-ray. We thus propose Raman spectroscopy as a way to

Journal

International Journal of Environmental Science and TechnologySpringer Journals

Published: Jun 4, 2018

References

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