Carbon microsphere from water hyacinth for supercapacitor electrode

Kurniawan, Fredi and Wongso, Michael and Ayucitra, Aning and Soetaredjo, Felycia Edi and Angkawijaya, Artik Elisa and Ju, Yi-Hsu and Ismadji, Suryadi (2015) Carbon microsphere from water hyacinth for supercapacitor electrode. Journal of the Taiwan Institute of Chemical Engineers, 47. pp. 197-201. ISSN 1876–1070

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

In this study, water hyacinth was hydrolyzed to sugars with dilute sulphuric acid (0.25 M) under subcritical water conditions (P=20bar, T= 130 8C) for 2h. The sugar solution was then carbonized under subcritical conditions to produce carbon microsphere. The subcritical water carbonization was conducted at 40 bar and various temperatures (160–200 8C) and times (6–10h). The highest yield of carbon microspheres was 0.1019 g/g dry water hyacinth at the temperature of 200 8C for 10 h. The carbon microsphere was activated using a Combination of chemical (KOH solution) and physical (microwave) treatments to increase the specific surface area and porosity of carbon microsphere. Electrocapacitive study of carbon microspheres showed that the carbon microsphere activated at impregnation ratio of 1:1 and microwave power of 630 W has the highest specific capacitance and excellent electrochemical stability.

Item Type: Article
Uncontrolled Keywords: Carbon microsphere Subcritical waterhydrolysis Subcritical water carbonization Microwave activation
Subjects: Engineering > Chemical Engineering
Divisions: Faculty of Engineering > Chemical Engineering Study Program
Depositing User: Felycia Edi Soetaredjo
Date Deposited: 17 Jul 2017 07:57
Last Modified: 22 May 2018 09:42
URI: http://repository.wima.ac.id/id/eprint/11035

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