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<p>The increasing demand for sustainable energy solutions has intensified interest in lignocellulosic biomass as a renewable alternative to fossil fuels. This study assesses the bioenergy potential from maintenance activities on a university campus in southern Brazil, typically underutilized resource for energy recovery. Residues, though poorly managed, present a viable pathway for waste valorization and renewable energy generation. A comprehensive physicochemical characterization was conducted through proximate and ultimate analyses, along with moisture content and higher heating value (HHV) determination. Biomass characterization recorded fixed carbon (20.14–22.45%), volatile matter (76.02–77.95%), ash content (1.56–2.39%), and calorific values (18.63–19.59&#xa0;MJ/kg). The ultimate analysis recorded carbon (46.10–48.79%), hydrogen (5.96–6.35%), oxygen (44.30–47.14%), and nitrogen (0.32–0.79%). To evaluate its energy recovery potential, a steady-state thermodynamic model simulated the combustion of 50&#xa0;kg/h lignocellulosic biomass in an incineration system coupled with a Rankine cycle power plant, achieving a peak output of 63.32&#xa0;kW. The novelty lies in modeling the energy recovery potential of a highly heterogeneous biomass stream, derived from non-industrial forest maintenance, an area scarcely explored in the literature. This research provides valuable data and modeling insights to guide energy systems design using low-grade, heterogeneous biomass fuels. Additionally, the study demonstrates how targeted heat exchanger optimization in the Rankine cycle can improve overall efficiency. The findings advance waste-to-energy strategies and open opportunities for future research in scaling up this approach to regions and types of biomass waste.</p> Graphical Abstract <p></p>

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Energy Recovery from Forest Residues: Thermodynamic Modeling of a Rankine Cycle

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Gilvana Scoculi de Lira,
  • Ihana A. Severo,
  • Henrique P. Guerra,
  • Fernando A. Ferraz,
  • Lauber S. Martins,
  • Juan C. Ordonez,
  • José V. C. Vargas,
  • Dhyogo M. Taher,
  • André B. Mariano

摘要

The increasing demand for sustainable energy solutions has intensified interest in lignocellulosic biomass as a renewable alternative to fossil fuels. This study assesses the bioenergy potential from maintenance activities on a university campus in southern Brazil, typically underutilized resource for energy recovery. Residues, though poorly managed, present a viable pathway for waste valorization and renewable energy generation. A comprehensive physicochemical characterization was conducted through proximate and ultimate analyses, along with moisture content and higher heating value (HHV) determination. Biomass characterization recorded fixed carbon (20.14–22.45%), volatile matter (76.02–77.95%), ash content (1.56–2.39%), and calorific values (18.63–19.59 MJ/kg). The ultimate analysis recorded carbon (46.10–48.79%), hydrogen (5.96–6.35%), oxygen (44.30–47.14%), and nitrogen (0.32–0.79%). To evaluate its energy recovery potential, a steady-state thermodynamic model simulated the combustion of 50 kg/h lignocellulosic biomass in an incineration system coupled with a Rankine cycle power plant, achieving a peak output of 63.32 kW. The novelty lies in modeling the energy recovery potential of a highly heterogeneous biomass stream, derived from non-industrial forest maintenance, an area scarcely explored in the literature. This research provides valuable data and modeling insights to guide energy systems design using low-grade, heterogeneous biomass fuels. Additionally, the study demonstrates how targeted heat exchanger optimization in the Rankine cycle can improve overall efficiency. The findings advance waste-to-energy strategies and open opportunities for future research in scaling up this approach to regions and types of biomass waste.

Graphical Abstract