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This study investigates a waste-to-fuel pathway that converts banana residues into bioethanol and implements a low-cost retrofit on a carbureted single-cylinder mototaxi engine (Wanxin CG200) to assess technical feasibility, emissions, and costs in central Peru. Laboratory processing (washing, crushing, hydrolysis, fermentation with Saccharomyces cerevisiae, and fractional distillation) yielded fuel-grade ethanol with ~86% alcohol by volume, suitable for pilot engine trials. Field instrumentation comprised an MSA Altair 4X multigas detector and a Scarlet Tech environmental meter; baseline measurements on gasoline showed very high CO (>2000 ppm) and H₂S up to ~25 ppm across 2000–4000 rpm, highlighting the need for cleaner combustion. Using the measured exhaust flow (2.6–4.1 m/s) and local ambient pressure (~514 mmHg), we developed a stoichiometry-based model to project emission changes for neat ethanol (E100): −65% CO, −34% CO₂, −25% NOx, −50% CH₄, and ~ 0 for H₂S, pending confirmation in matched on-road trials. A preliminary cost analysis suggests a 55.8% reduction in cost per kilometer when substituting gasoline (S/0.258 km−1) with ethanol (S/0.114 km−1), assuming 19 km·L−1 for gasoline versus 22 km·L−1 for ethanol and local prices. Beyond emissions, the approach valorizes agro-industrial waste streams, supporting circular-economy practices in San Ramón and comparable regions. Ongoing work focuses on controlled A–B engine testing with identical duty cycles to empirically validate modeled reductions and characterize power, BSFC, and cold-start behavior under high-altitude conditions.

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Development and Implementation of Bioethanol in a Mototaxi Engine for the Reduction of Atmospheric Emissions in San Ramón, Peru

  • 会议论文

  • 发表日期：

    2026年

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  • Sandra Paola Molina Isla,
  • Monica Blanca Seguil Quispe,
  • Claudette Svietta Serna Bontemps,
  • Gustavo Diego Aguilar Mendizabal,
  • Jhonatan Romani Surichaqui

摘要

This study investigates a waste-to-fuel pathway that converts banana residues into bioethanol and implements a low-cost retrofit on a carbureted single-cylinder mototaxi engine (Wanxin CG200) to assess technical feasibility, emissions, and costs in central Peru. Laboratory processing (washing, crushing, hydrolysis, fermentation with Saccharomyces cerevisiae, and fractional distillation) yielded fuel-grade ethanol with ~86% alcohol by volume, suitable for pilot engine trials. Field instrumentation comprised an MSA Altair 4X multigas detector and a Scarlet Tech environmental meter; baseline measurements on gasoline showed very high CO (>2000 ppm) and H₂S up to ~25 ppm across 2000–4000 rpm, highlighting the need for cleaner combustion. Using the measured exhaust flow (2.6–4.1 m/s) and local ambient pressure (~514 mmHg), we developed a stoichiometry-based model to project emission changes for neat ethanol (E100): −65% CO, −34% CO₂, −25% NOx, −50% CH₄, and ~ 0 for H₂S, pending confirmation in matched on-road trials. A preliminary cost analysis suggests a 55.8% reduction in cost per kilometer when substituting gasoline (S/0.258 km−1) with ethanol (S/0.114 km−1), assuming 19 km·L−1 for gasoline versus 22 km·L−1 for ethanol and local prices. Beyond emissions, the approach valorizes agro-industrial waste streams, supporting circular-economy practices in San Ramón and comparable regions. Ongoing work focuses on controlled A–B engine testing with identical duty cycles to empirically validate modeled reductions and characterize power, BSFC, and cold-start behavior under high-altitude conditions.