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Microwave pyrolysis of pecan nut shell and thermogravimetric, textural and spectroscopic characterization of carbonaceous products

Durán-Jiménez, G.; Hernández-Montoya, V.; Montes-Morán, M.A.; Kingman, S.W.; Monti, T.; Binner, E.R.

Microwave pyrolysis of pecan nut shell and thermogravimetric, textural and spectroscopic characterization of carbonaceous products Thumbnail


Authors

V. Hernández-Montoya

M.A. Montes-Morán

SAM KINGMAN SAM.KINGMAN@NOTTINGHAM.AC.UK
Pro-Vice Chancellor Faculty of Engineering

T. Monti



Abstract

In the present work, the pyrolysis of pecan nut shell was studied using microwave technology at different input power and exposure time. The carbonaceous products were characterized using elemental analysis, potentiometric titration, thermogravimetric analysis, N2 adsorption isotherms at −196 °C and FT-IR spectroscopy. The characteristics of microwave carbonaceous products were compared with carbons prepared by conventional heating and commercial carbons and finally, the interaction of textile dyes with the carbonaceous materials was studied. The results are indicating that it is possible to obtain carbonaceous materials with similar textural parameters in conventional and microwave systems, but for microwave heating the processing times are short (3 min). Also, the exposure time of 2 min of microwave are not enough for the complete depolymerization of the lignocellulosic matrix of the pecan nut shell and significant amount of cellulose and hemicelluloses remain in char after microwave treatment. Finally, all the carbons obtained by microwave heating are microporous materials with a high number of basic groups on their surface and the high molecular size of dyes is controlling the adsorption on these materials.

Citation

Durán-Jiménez, G., Hernández-Montoya, V., Montes-Morán, M., Kingman, S., Monti, T., & Binner, E. (2018). Microwave pyrolysis of pecan nut shell and thermogravimetric, textural and spectroscopic characterization of carbonaceous products. Journal of Analytical and Applied Pyrolysis, 135, 160-168. https://doi.org/10.1016/j.jaap.2018.09.007

Journal Article Type Article
Acceptance Date Sep 6, 2018
Online Publication Date Sep 7, 2018
Publication Date Oct 31, 2018
Deposit Date Oct 18, 2018
Publicly Available Date Sep 8, 2019
Journal Journal of Analytical and Applied Pyrolysis
Print ISSN 0165-2370
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 135
Pages 160-168
DOI https://doi.org/10.1016/j.jaap.2018.09.007
Keywords Carbons; Microwave technology; Pyrolysis; Textile dyes
Public URL https://nottingham-repository.worktribe.com/output/1174714
Publisher URL https://www.sciencedirect.com/science/article/pii/S0165237018302857?via%3Dihub
Additional Information This article is maintained by: Elsevier; Article Title: Microwave pyrolysis of pecan nut shell and thermogravimetric, textural and spectroscopic characterization of carbonaceous products; Journal Title: Journal of Analytical and Applied Pyrolysis; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.jaap.2018.09.007; Content Type: article; Copyright: © 2018 Elsevier B.V. All rights reserved.
Contract Date Oct 22, 2018

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