Indian Journal of Pure and Applied Physics

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Hydrothermal Carbonization of Walnut Shell Biomass to Biochar for Supercapacitor Application


Affiliations
1 Department of Physics, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
 

Hydrothermal carbonization is now emerging to address society's global sustainability problems by reprocessing several industrial and agricultural wastes to derive promising carbonaceous materials such as graphene, biochar, and activated carbon. This approach will further resolve the difficulties related to the safe recycling of waste materials and also the consumption of fossil fuels. This work focuses on synthesizing biochar via hydrothermal carbonization at temperatures 220 °C and residence time (6, 12, 18, and 24 h) and their effects on product yield and other parameters studied. Characterizations of biochar produced at different times were carried out using techniques like X-ray diffraction, UV-Visible Spectroscopy, and N2 adsorption/desorption isotherm. The biochar yield reduced from 56.4-40.2 wt-% with a rise in dwelling time. BET surface area was found to increase as we increased the reaction time. On the base of the maximum surface area, electrochemical analysis was performed to check the role of biochar as a supercapacitor electrode.

Keywords

Hydrothermal Carbonization, Biochar, BET Surface Area, Supercapacitor, Waste Management.
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  • Hydrothermal Carbonization of Walnut Shell Biomass to Biochar for Supercapacitor Application

Abstract Views: 95  |  PDF Views: 54

Authors

Raman Devi
Department of Physics, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
Vinay Kumar
Department of Physics, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
Sunil Kumar
Department of Physics, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
Mamta Bulla
Department of Physics, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
Paul Singh
Department of Physics, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India

Abstract


Hydrothermal carbonization is now emerging to address society's global sustainability problems by reprocessing several industrial and agricultural wastes to derive promising carbonaceous materials such as graphene, biochar, and activated carbon. This approach will further resolve the difficulties related to the safe recycling of waste materials and also the consumption of fossil fuels. This work focuses on synthesizing biochar via hydrothermal carbonization at temperatures 220 °C and residence time (6, 12, 18, and 24 h) and their effects on product yield and other parameters studied. Characterizations of biochar produced at different times were carried out using techniques like X-ray diffraction, UV-Visible Spectroscopy, and N2 adsorption/desorption isotherm. The biochar yield reduced from 56.4-40.2 wt-% with a rise in dwelling time. BET surface area was found to increase as we increased the reaction time. On the base of the maximum surface area, electrochemical analysis was performed to check the role of biochar as a supercapacitor electrode.

Keywords


Hydrothermal Carbonization, Biochar, BET Surface Area, Supercapacitor, Waste Management.

References