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Novel Heat-Integrated Hybrid Distillation and Adsorption Process for Coproduction of Cellulosic Ethanol, Heat, and Electricity from Actual Lignocellulosic Fermentation Broth

Author

Listed:
  • Le Cao Nhien

    (School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea
    These authors contributed equally to this work.)

  • Nguyen Van Duc Long

    (School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea
    These authors contributed equally to this work.)

  • Moonyong Lee

    (School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea)

Abstract

Cellulosic ethanol (CE) can not only be produced from a nonedible, cheap, and abundant lignocellulose feedstock but also can reduce carbon footprint significantly compared to starch ethanol. Despite great stimulation worldwide, CE production has not yet commercialized because of the complexity of lignocellulose. Therefore, intensive research and development are needed to improve CE technologies. In this study, a cost-efficient and sustainable design was proposed for the coproduction of CE, heat, and electricity from the actual lignocellulosic fermentation broth. First, a conventional coproduction process of CE, heat, and electricity based on hybrid distillation and adsorption (HDA) was simulated and optimized. Subsequently, various heat integrated (HI) techniques such as heat pump (HP), multi-effect distillation (MED), and combined HP-MED were evaluated to improve the CE process. The combined heat and power (CHP) process that utilized the combustible solids of the beer stillage was designed and integrated with the CE process. Structural alternatives were assessed for both economic and environmental impacts. The results show that the proposed HI-HDA process can save 36.9% and 33.6% of total annual costs and carbon footprint, respectively, compared to the conventional CE process. In the proposed HI-HDA coproduction process, the CE recovery process can be self-efficient in energy and the CHP can generate 12.0% more electricity than that in the conventional coproduction process.

Suggested Citation

  • Le Cao Nhien & Nguyen Van Duc Long & Moonyong Lee, 2021. "Novel Heat-Integrated Hybrid Distillation and Adsorption Process for Coproduction of Cellulosic Ethanol, Heat, and Electricity from Actual Lignocellulosic Fermentation Broth," Energies, MDPI, vol. 14(12), pages 1-17, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3377-:d:571132
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    References listed on IDEAS

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    1. Tobias Pröll & Florian Zerobin, 2019. "Biomass-based negative emission technology options with combined heat and power generation," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 24(7), pages 1307-1324, October.
    2. Le Cao Nhien & Nguyen Van Duc Long & Moonyong Lee, 2021. "Novel Hybrid Reactive Distillation with Extraction and Distillation Processes for Furfural Production from an Actual Xylose Solution," Energies, MDPI, vol. 14(4), pages 1-16, February.
    3. Grisales Díaz, Victor Hugo & Willis, Mark J. & von Stosch, Moritz & Olivar Tost, Gerard & Prado-Rubio, Oscar, 2020. "Assessing the energy requirements for butanol production using fermentation tanks-in-series operated under vacuum," Renewable Energy, Elsevier, vol. 160(C), pages 1253-1264.
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