Oxidation Characteristics of Water Soluble Fractions of Agro-Stalks with Focus on Function of Reactive Inorganics

  • Rongkui Zhao Shandong University of Technology, Zibo, Shandong, 255049, China
  • F. He Shandong University of Technology, Zibo, Shandong, 255049, China
  • F. Behrendt Shandong University of Technology, Zibo, Shandong, 255049, China; Technische Universität Berlin, Berlin, 10623, Germany
  • J. Cai Shanghai Jiao Tong University, Shanghai, 200240, China
  • A. Dieguez-Alonso Otto-von-Guericke-Universität Magdeburg, Magdeburg, 39106, Germany
  • Y. Liu Shandong University of Technology, Zibo, Shandong, 255049, China
Keywords: water soluble fractions, oxidation characteristics, reactive inorganics

Abstract

In order to deepen the understanding of the thermochemical behavior of reactive inorganics, which play an important role in slagging and fouling during combustion of agro-stalks, the oxidation behavior of the water-soluble fraction of corn stover, wheat straw and rice straw was examined using a simultaneous thermogravimetric analyzer. The oxidation characteristics were discussed in combination with elemental analysis of water-soluble fractions. Results showed that reactive inorganics elements account for 30–40% in water-soluble fractions of the three agro-stalks and carbon was oxidized at two separate stages. Four stages were found during oxidation of water-soluble fractions – (1) devolatilisation of organics (100‒400 °C); (2) oxidation of char (400–650 °C); (3) oxidation of char with melting of salts or decomposition of carbonate (650–800 °C); (4) vaporization of KCl (800–1000 °C). This work provides a base study for an optimized design of combustion for agro-stalks and pharmaceutical waste.

 

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Published
2021-11-10
How to Cite
[1]
R. Zhao, F. He, F. Behrendt, J. Cai, A. Dieguez-Alonso, and Y. Liu, “Oxidation Characteristics of Water Soluble Fractions of Agro-Stalks with Focus on Function of Reactive Inorganics”, Eurasian Chem.-Technol. J., vol. 23, no. 3, pp. 181-189, Nov. 2021.
Section
Articles