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Reduction of process steam demand and water-usage through heat integration in sugar and ethanol production from sugarcane – Evaluation of different plant configurations

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  • Pina, Eduardo A.
  • Palacios-Bereche, Reynaldo
  • Chavez-Rodriguez, Mauro F.
  • Ensinas, Adriano V.
  • Modesto, Marcelo
  • Nebra, Silvia A.

Abstract

The sugarcane industry represents one of the most important economic activities in Brazil producing sugar and ethanol for the internal and external markets. There are also plants dedicated only to ethanol production. The aim of this study is to accomplish a joint assessment to evaluate the reduction of process steam demand and water usage obtained through heat integration and an exergy analysis to quantify the reduction in irreversibility generation owing to heat integration procedure. Two configurations of plant were analysed Case I – all sugarcane juice is destined to produce ethanol without sugar production and Case II – distribution of 50%/50% of total recoverable sugars in sugar and ethanol production. Simulations in ASPEN PLUS® software were performed in order to evaluate the mass and energy balances and heat integration using the Pinch Method was applied in order to minimize the utilities consumption. The results showed that heat integration promoted a reduction in steam consumption of 35% approximately, while the reduction in water consumption (water collecting requirement) was 24 and 13% in comparison to the conventional cases without heat integration.

Suggested Citation

  • Pina, Eduardo A. & Palacios-Bereche, Reynaldo & Chavez-Rodriguez, Mauro F. & Ensinas, Adriano V. & Modesto, Marcelo & Nebra, Silvia A., 2017. "Reduction of process steam demand and water-usage through heat integration in sugar and ethanol production from sugarcane – Evaluation of different plant configurations," Energy, Elsevier, vol. 138(C), pages 1263-1280.
    • Handle: RePEc:eee:energy:v:138:y:2017:i:c:p:1263-1280
    DOI: 10.1016/j.energy.2015.06.054
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    5. Milão, Raquel de Freitas Dias & Carminati, Hudson B. & Araújo, Ofélia de Queiroz F. & de Medeiros, José Luiz, 2019. "Thermodynamic, financial and resource assessments of a large-scale sugarcane-biorefinery: Prelude of full bioenergy carbon capture and storage scenario," Renewable and Sustainable Energy Reviews, Elsevier, vol. 113(C), pages 1-1.
    6. Botshekan, Maryam & Moheb, Ahmad & Vatankhah, Fatemeh & Karimi, Keikhosro & Shafiei, Marzieh, 2022. "Energy saving alternatives for renewable ethanol production with the focus on separation/purification units: A techno-economic analysis," Energy, Elsevier, vol. 239(PE).
    7. Kondaveeti, Sanath & Patel, Sanjay K.S. & Pagolu, Raviteja & Li, Jinglin & Kalia, Vipin C. & Choi, Myung-Seok & Lee, Jung-Kul, 2019. "Conversion of simulated biogas to electricity: Sequential operation of methanotrophic reactor effluents in microbial fuel cell," Energy, Elsevier, vol. 189(C).
    8. Palacios-Bereche, M.C. & Palacios-Bereche, R. & Ensinas, A.V. & Gallego, A. Garrido & Modesto, Marcelo & Nebra, S.A., 2022. "Brazilian sugar cane industry – A survey on future improvements in the process energy management," Energy, Elsevier, vol. 259(C).
    9. Fukushima, Nilton Asao & Palacios-Bereche, Milagros Cecilia & Palacios-Bereche, Reynaldo & Nebra, Silvia Azucena, 2019. "Energy analysis of the ethanol industry considering vinasse concentration and incineration," Renewable Energy, Elsevier, vol. 142(C), pages 96-109.
    10. Klemeš, Jiří Jaromír & Varbanov, Petar Sabev & Walmsley, Timothy G. & Jia, Xuexiu, 2018. "New directions in the implementation of Pinch Methodology (PM)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 98(C), pages 439-468.
    11. Salina, Fernando Henriques & Molina, Felipe Braggio & Gallego, Antonio Garrido & Palacios-Bereche, Reynaldo, 2021. "Fast pyrolysis of sugarcane straw and its integration into the conventional ethanol production process through Pinch Analysis," Energy, Elsevier, vol. 215(PA).
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