10.1007/s40095-020-00366-w

Efficient conversion of cornstalk to bioethanol using dilute H2SO4 pretreatment

  1. Institute of Fuel Research and Development, Bangladesh Council of Scientific and Industrial Research, Dhaka, 1205, BD
  2. Biotechnology Center, Forestry Research Institute of Nigeria, Dugbe Ibadan, NG Nanoscience Department, The Joint School of Nanoscience and Nanoengineering, University of North Carolina, Chapel Hill, NC, 27401, US
  3. Institute of Fuel Research and Development, Bangladesh Council of Scientific and Industrial Research, Dhaka, 1205, BD Biotechnology Center, Forestry Research Institute of Nigeria, Dugbe Ibadan, NG

Published in Issue 2020-11-04

How to Cite

Jehadin, F., Rabeya, T., Asad, M. A., Ayodele, O. O., Adekunle, A. E., & Islam, M. S. (2020). Efficient conversion of cornstalk to bioethanol using dilute H2SO4 pretreatment. International Journal of Energy and Environmental Engineering, 12(2 (June 2021). https://doi.org/10.1007/s40095-020-00366-w

Abstract

Abstract Corn stalk (CS) is one of the most abundant agricultural residues containing high polysaccharides for low-cost bioethanol production. In this study, dilute acid along with intensified thermal pretreatment of CS and other parameters were optimized for higher yield of bioethanol. CS samples were pretreated using H 2 SO 4 concentrations of 0.5, 1.0, 1.5, 2.0, and 2.5% at 100 °C for 1 h reaction time. Optimal conditions of 2% acid-pretreated CS, 5% (w/v) of Saccharomyces cerevisiae addition and 48 h fermentation produced highest yield of bioethanol: 32.53 (g/L) which was 1.24-fold increase. Hemicellulose degradation of 75.68% was recorded in the 2% acid-treated substrate. Scanning electron microscope (SEM) images revealed induced porosity and surface area disruption of CS in the treated samples. Crystallinity of the treated samples increased as shown by X-ray diffraction (XRD) analysis. Low concentrated H 2 SO 4 coupled with thermal pretreatment could be a viable method of lignocellulosic biomass utilization for efficient bioethanol production. Graphic abstract

Keywords

  • Bioethanol,
  • Acid pretreatment,
  • Biofuel,
  • Corn stalk,
  • Fermentation

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