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ORIGINAL RESEARCH article

Front. Sustain.
Sec. Waste Management
Volume 5 - 2024 | doi: 10.3389/frsus.2024.1417207
This article is part of the Research Topic Circular Economy and Food Systems: Challenges and Opportunities in Waste Management, with Reference to Developing Economies View all 3 articles

Valorization of Peanut Shells through Biochar Production using Slow and Fast Pyrolysis and its Detailed Physicochemical Characterisation

Provisionally accepted
Gajanan L. Sawargaonkar Gajanan L. Sawargaonkar Rajesh Pasumarthi Rajesh Pasumarthi *Santosh Kale Santosh Kale Pushpajeet Choudhari Pushpajeet Choudhari Srikanth Mutnuri Srikanth Mutnuri Ajay Singh Ajay Singh Harikishan Sudini Harikishan Sudini Manasa Ramaraju Manasa Ramaraju Ramesh Singh Ramesh Singh Mangi L. Jat Mangi L. Jat
  • International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Telangana, India

The final, formatted version of the article will be published soon.

    Valorization of peanut shells has recently gained prominence in the context of thermally converting agricultural waste into biochar, a carbon-rich byproduct with significant potential as a soil amendment. The present study delves into understanding the influence of slow (450 o C and 500 o C ) and fast (550 o C and 600 o C) pyrolysis temperatures with a resident time of 60 and 30 minutes, respectively, on the physico-chemical properties of peanut shell biochar produced in a low-cost kiln. The Scanning Electron Microscopy analysis revealed that increased pyrolysis temperature increased porosity and surface roughness with crystalline deposits.Thermogravimetric analysis showed that increased temperatures contributed to enhanced thermal stability but reduced biochar yield. Pyrolysis temperatures of 450, 500, 550, and 600 o C exhibited 32. 19, 29.13, 21.8, and 19.43 percent conversion efficiency with organic carbon content of 11.57, 6.48, 8.64, and 7.76 percent, respectively. The intensities of functional groups (C-H and C-O) declined, whereas the intensity of C=C and stable carbon content increased with the rise in temperatures. The concentrations of heavy metals in all biochar samples were below permissible limits outlined by international biochar initiatives. The study concluded that slow pyrolysis at 450 o C for 60 minutes resident time is an ideal pyrolytic condition for producing peanut shell biochar in terms of qualitative and quantitative characteristics.

    Keywords: Peanut shells, biochar, slow and fast pyrolysis, SEM-EDX, FTIR, TGA are still …dded products viz Font color: Light Blue Not Highlight Formatted: Font color: Light Blue, Not Highlight Font: Italic, Font color: Light Blue

    Received: 14 Apr 2024; Accepted: 08 Jul 2024.

    Copyright: © 2024 Sawargaonkar, Pasumarthi, Kale, Choudhari, Mutnuri, Singh, Sudini, Ramaraju, Singh and Jat. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Rajesh Pasumarthi, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, 502307, Telangana, India

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