Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor

Pine tree biochar produced by flame-curtain pyrolysis, an inexpensive and simple pyrolysis methodology, was used as the starting material for KOH-activated carbon. Flame-curtain pyrolysis is a simple, low-technology methodology that can be performed by non-specialized personnel. The elemental analys...

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Autores principales:	Toshiki Tsubota, Shion Tsuchiya, Tatsuya Kusumoto, Dimitrios Kalderis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	flame-curtain pyrolysis biochar activated carbon electric double-layer capacitor energy storage Technology T
Acceso en línea:	https://doaj.org/article/c7e9495c46c047749b6752091d1234b2
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spelling	oai:doaj.org-article:c7e9495c46c047749b6752091d1234b22021-11-25T17:27:46ZAssessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor10.3390/en142276711996-1073https://doaj.org/article/c7e9495c46c047749b6752091d1234b22021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7671https://doaj.org/toc/1996-1073Pine tree biochar produced by flame-curtain pyrolysis, an inexpensive and simple pyrolysis methodology, was used as the starting material for KOH-activated carbon. Flame-curtain pyrolysis is a simple, low-technology methodology that can be performed by non-specialized personnel. The elemental analysis of the biochars highlighted the high reproducibility of the process. The N<sub>2</sub> adsorption isotherms indicated that KOH activation was effective for the preparation of high-surface-area activated carbons from the biochar. The BET specific surface area increased with the quantity of KOH added in the activation process, achieving a maximum value of 3014 m<sup>2</sup> g<sup>−1</sup> at 85.7 wt.% of KOH addition. The adsorption isotherms of all samples were IUPAC type I, establishing their microporous nature. Results from the Mikhail–Brunauer (MP) method and α<sub>s</sub> plot indicated that the pore size distribution became wider and the pore volume increased as the KOH content increased. The measured capacitance values followed the same dependence on KOH content. The maximum capacitance value at 1 mV s<sup>−1</sup> was determined as 200.6 F g<sup>−1</sup> for the sample prepared at 75 wt.% of KOH addition. Therefore, pine tree biochar prepared by simple pyrolysis equipment is a suitable precursor for the development of an electric double-layer capacitor.Toshiki TsubotaShion TsuchiyaTatsuya KusumotoDimitrios KalderisMDPI AGarticleflame-curtain pyrolysisbiocharactivated carbonelectric double-layer capacitorenergy storageTechnologyTENEnergies, Vol 14, Iss 7671, p 7671 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	flame-curtain pyrolysis biochar activated carbon electric double-layer capacitor energy storage Technology T
spellingShingle	flame-curtain pyrolysis biochar activated carbon electric double-layer capacitor energy storage Technology T Toshiki Tsubota Shion Tsuchiya Tatsuya Kusumoto Dimitrios Kalderis Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor
description	Pine tree biochar produced by flame-curtain pyrolysis, an inexpensive and simple pyrolysis methodology, was used as the starting material for KOH-activated carbon. Flame-curtain pyrolysis is a simple, low-technology methodology that can be performed by non-specialized personnel. The elemental analysis of the biochars highlighted the high reproducibility of the process. The N<sub>2</sub> adsorption isotherms indicated that KOH activation was effective for the preparation of high-surface-area activated carbons from the biochar. The BET specific surface area increased with the quantity of KOH added in the activation process, achieving a maximum value of 3014 m<sup>2</sup> g<sup>−1</sup> at 85.7 wt.% of KOH addition. The adsorption isotherms of all samples were IUPAC type I, establishing their microporous nature. Results from the Mikhail–Brunauer (MP) method and α<sub>s</sub> plot indicated that the pore size distribution became wider and the pore volume increased as the KOH content increased. The measured capacitance values followed the same dependence on KOH content. The maximum capacitance value at 1 mV s<sup>−1</sup> was determined as 200.6 F g<sup>−1</sup> for the sample prepared at 75 wt.% of KOH addition. Therefore, pine tree biochar prepared by simple pyrolysis equipment is a suitable precursor for the development of an electric double-layer capacitor.
format	article
author	Toshiki Tsubota Shion Tsuchiya Tatsuya Kusumoto Dimitrios Kalderis
author_facet	Toshiki Tsubota Shion Tsuchiya Tatsuya Kusumoto Dimitrios Kalderis
author_sort	Toshiki Tsubota
title	Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor
title_short	Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor
title_full	Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor
title_fullStr	Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor
title_full_unstemmed	Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor
title_sort	assessment of biochar produced by flame-curtain pyrolysis as a precursor for the development of an efficient electric double-layer capacitor
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c7e9495c46c047749b6752091d1234b2
work_keys_str_mv	AT toshikitsubota assessmentofbiocharproducedbyflamecurtainpyrolysisasaprecursorforthedevelopmentofanefficientelectricdoublelayercapacitor AT shiontsuchiya assessmentofbiocharproducedbyflamecurtainpyrolysisasaprecursorforthedevelopmentofanefficientelectricdoublelayercapacitor AT tatsuyakusumoto assessmentofbiocharproducedbyflamecurtainpyrolysisasaprecursorforthedevelopmentofanefficientelectricdoublelayercapacitor AT dimitrioskalderis assessmentofbiocharproducedbyflamecurtainpyrolysisasaprecursorforthedevelopmentofanefficientelectricdoublelayercapacitor
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Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor

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