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Characteristic modification of alkalized corn stalk and contribution to the bonding mechanism of fuel briquette

Author

Listed:
  • Liu, Xian
  • Wu, Zhicheng
  • Han, Yahong
  • Han, Lujia

Abstract

In this paper, corn stalk was alkalized by gradient concentrations of sodium hydroxide and briquetted with anthracite coal. The bonding mechanism was explored by a combined analysis of physicochemical, microstructure and mechanical properties. Alkaline treatment had a large effect on decomposing most of lignin and dissolving the carbohydrates in corn stalk even at a low concentration of 1%. With the increase in alkaline concentration (for 1%–2%), the degree of decomposition of hemicellulose and amorphous cellulose increased gradually. When the concentration of alkaline reagent was higher than 3%, more than 40% of hemicellulose was degraded. A complete surface structure of a spatial network was achieved when corn stalk was treated by 2% alkaline, which mainly contributed to the bonding performance of compound briquette. Under this condition, the ratio of cellulose to hemicellulose to lignin was approximately 7.0:2.5:0.5, and it also exhibited a good pyrolysis performance for energy conversion.

Suggested Citation

  • Liu, Xian & Wu, Zhicheng & Han, Yahong & Han, Lujia, 2017. "Characteristic modification of alkalized corn stalk and contribution to the bonding mechanism of fuel briquette," Energy, Elsevier, vol. 133(C), pages 299-305.
    • Handle: RePEc:eee:energy:v:133:y:2017:i:c:p:299-305
    DOI: 10.1016/j.energy.2017.05.083
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