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Characteristics of Hydrochars Prepared from Cassava Residues Using Different Aqueous Media

  • Cinthia J. Mena-Durán
  • P. Quintana
  • Romeli Barbosa
  • J. M. Baas
  • B. EscobarEmail author
Short Communication
  • 30 Downloads

Abstract

This study presents the synthesis and physicochemical characterization of functionalized carbon-based materials prepared from cassava residues (Manihot esculenta). Cassava residues were obtained from a local market, washed, dried and ground to small particle size. This powder was mixed with different aqueous media: diluted sulfuric acid (0.2 M), nejayote and deionized water. These mixtures were treated in an autoclave at 200 °C for 4 h. The physicochemical characteristics of samples were studied by SEM, TGA, FTIR, XPS and elemental analysis. The chemical composition of C:O was similar among groups, but TGA suggested that the hydrochar prepared with sulphuric acid presented a better thermal stability, with a decomposition peak at 435 °C, which was 80 °C higher than samples prepared with deionized water. The acid sample also had lower mass loss (47.3%). The SEM images showed that sulphuric acid promoted the formation of small needle-like structures, while samples prepared using nejayote and water showed agglomerates with a few spherical shapes. The proximate analysis indicated that there was a carbon enrichment from 41% from the original sample to 62% after the hydrothermal process.

Keywords

Hydrochars Cassava Nejayote Waste biomass 

Notes

Acknowledgements

The authors appreciate the LENERSE-254667 and Problemas Nacionales 2266 grants. XPS measurements were performed at LANNBIO Cinvestav Mérida, under support from projects FOMIX-Yucatán 2008-108160 CONACYT LAB-2009-01-123913, 292692, 294643, 188345, 204822, 292692, and 294643. Technical help is acknowledged to Ing W Cauich. Support to BEM through the Programa de Cátedras—CONACYT is acknowledged.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Centro de Investigación Científica de YucatánMéridaMexico
  2. 2.Cinvestav Unidad MéridaMéridaMexico
  3. 3.Universidad de Quintana RooChetumalMexico

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