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The scarcity of fossil fuels has driven the search for sustainable alternatives in internal combustion engines (ICEs). Diesel engines, known for their efficiency, dependability, and cost-effectiveness, are extensively utilized across various industries. Hydrothermal liquefaction (HTL) has demonstrated promise in converting wet biomass, such as algae, into biocrude, as evidenced by initial tests on diesel engines. This research investigates the feasibility of utilizing Chlorella Vulgaris Algal (CVA) bio-oil, produced through HTL, as a renewable fuel for ICEs. The CVA bio-oil exhibits higher viscosity, flash point, and fire point compared to traditional diesel fuel. To ensure compatibility with direct injection diesel engines, scientists formulated CVA bio-oil blends with standard diesel at 10 and 20% volume ratios and evaluated their physicochemical properties. Performance tests were conducted on a single-cylinder diesel engine at various loads (0–100%, 25% increments) and a constant speed of 1500 rpm. An exergy analysis was performed to assess thermal energy conversion, examine brake power, cooling water heat absorption, and exhaust gas heat dissipation.

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Sustainable Fuel Options: Evaluating the Performance, and Emissions of Chlorella Vulgaris Algal HTL Bio-Oil Blends in a Diesel Engine

  • 会议论文

  • 发表日期：

    2026年

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  • J. Mozas Santhose Kumar,
  • R. Prakash,
  • C. G. Mohan,
  • Padmanathan Panneerselvam

摘要

The scarcity of fossil fuels has driven the search for sustainable alternatives in internal combustion engines (ICEs). Diesel engines, known for their efficiency, dependability, and cost-effectiveness, are extensively utilized across various industries. Hydrothermal liquefaction (HTL) has demonstrated promise in converting wet biomass, such as algae, into biocrude, as evidenced by initial tests on diesel engines. This research investigates the feasibility of utilizing Chlorella Vulgaris Algal (CVA) bio-oil, produced through HTL, as a renewable fuel for ICEs. The CVA bio-oil exhibits higher viscosity, flash point, and fire point compared to traditional diesel fuel. To ensure compatibility with direct injection diesel engines, scientists formulated CVA bio-oil blends with standard diesel at 10 and 20% volume ratios and evaluated their physicochemical properties. Performance tests were conducted on a single-cylinder diesel engine at various loads (0–100%, 25% increments) and a constant speed of 1500 rpm. An exergy analysis was performed to assess thermal energy conversion, examine brake power, cooling water heat absorption, and exhaust gas heat dissipation.