Structure-mechanics property relationship of waste derived biochars

The Science of the Total Environment
Oisik DasDebes Bhattacharyya

Abstract

The widespread applications of biochar in agriculture and environmental remediation made the scientific community ignore its mechanical properties. Hence, to examine the scope of biochar's structural applications, its mechanical properties have been investigated in this paper through nanoindentation technique. Seven waste derived biochars, made under different pyrolysis conditions and from diverse feedstocks, were studied via nanoindentation, infrared spectroscopy, X-ray crystallography, thermogravimetry, and electron microscopy. Following this, an attempt was made to correlate the biochars' hardness/modulus with reaction conditions and their chemical properties. The pine wood biochar made at 900°C and 60min residence time was found to have the highest hardness and elastic modulus of 4.29 and 25.01GPa, respectively. It was shown that a combination of higher heat treatment (≥500°C) temperature and longer residence time (~60min) increases the values of hardness and modulus. It was further realized that pyrolysis temperature was a more dominant factor than residence time in determining the final mechanical properties of biochar particles. The degree of aromaticity and crystallinity of the biochar were also correlated with higher v...Continue Reading

References

Nov 20, 2003·Nature Materials·Jozef KeckesPeter Fratzl
Dec 17, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Bo HuXue-Wei Xu
Feb 26, 2011·Journal of Agricultural and Food Chemistry·Minori UchimiyaIsabel M Lima
Feb 7, 2012·Bioresource Technology·Matheus PolettoRuth M C Santana
Jan 31, 2015·The Science of the Total Environment·Oisik Das, Ajit K Sarmah
Jan 31, 2015·The Science of the Total Environment·Oisik DasDebes Bhattacharyya
Aug 19, 2015·The Science of the Total Environment·Oisik Das, Ajit K Sarmah

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Citations

Jan 26, 2016·The Science of the Total Environment·Oisik DasDebes Bhattacharyya
Sep 14, 2016·The Science of the Total Environment·Peter I MacreadieJeffrey J Kelleway
Aug 3, 2019·Polymers·Jonnys P CastroGustavo H D Tonoli
Mar 30, 2018·Environmental Management·Oisik DasDebes Bhattacharyya
Nov 5, 2019·The Science of the Total Environment·Chenting ZhangXun Hu

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