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Biomass to bio-ethanol: The evaluation of hybrid Pennisetum used as raw material for bio-ethanol production compared with corn stalk by steam explosion joint use of mild chemicals

Author

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  • Zhang, Jingzhi
  • Song, Yanliang
  • Wang, Bingwu
  • Zhang, Xu
  • Tan, Tianwei

Abstract

The second generation biomass to bio-ethanol production is of growing interest. Energy crop were becoming important for second generation biomass to bio-ethanol production for their growth advantages. Hybrid Pennisetum as a new hybrid energy crop was selected as a model to compare with corn stalk. As pre-treatment methods, steam explosion and its combined action with dilute sulfuric acid, bisulfite, and mixed dilute acid and bisulfite were selected. The enzymatic hydrolysis demonstrated that the cellulose conversion is a strong function of the pre-treatment method applied, with corn stalk providing slightly better results. With dilute acid steam explosion (DA-SE), conversions were 67.6% and 54.5% for corn stalk and pennisetum, respectively. This can be attributed to the higher Cr. I of pennisetum (65.03%) than of corn stalk (54.05%). The cell lumen of pretreated pennisetum was smaller than for corn stalk as shown in SEM photos, meaning there was a substantially higher enzyme accessible surface and porosity in pennisetum, thus responsible for the higher cellulase adsorption of pretreated pennisetum. DA-SE was the most effective pre-treatment method, but the inhibitors' concentration was higher than in other methods. Combined dilute acid and bisulfite can moderately remove hemicelluloses and lignin. Cr. I values, lignin content, accessible surface and porosity were supplied the energy crop evaluation standards for bio-ethanol production.

Suggested Citation

  • Zhang, Jingzhi & Song, Yanliang & Wang, Bingwu & Zhang, Xu & Tan, Tianwei, 2016. "Biomass to bio-ethanol: The evaluation of hybrid Pennisetum used as raw material for bio-ethanol production compared with corn stalk by steam explosion joint use of mild chemicals," Renewable Energy, Elsevier, vol. 88(C), pages 164-170.
    • Handle: RePEc:eee:renene:v:88:y:2016:i:c:p:164-170
    DOI: 10.1016/j.renene.2015.11.034
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    References listed on IDEAS

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    1. Imman, Saksit & Arnthong, Jantima & Burapatana, Vorakan & Champreda, Verawat & Laosiripojana, Navadol, 2015. "Fractionation of rice straw by a single-step solvothermal process: Effects of solvents, acid promoters, and microwave treatment," Renewable Energy, Elsevier, vol. 83(C), pages 663-673.
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    Cited by:

    1. Eckert, C.T. & Frigo, E.P. & Albrecht, L.P. & Albrecht, A.J.P. & Christ, D. & Santos, W.G. & Berkembrock, E. & Egewarth, V.A., 2018. "Maize ethanol production in Brazil: Characteristics and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3907-3912.

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