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Upgrading Esterified Pyrolysis Bio-Oil through a Two-Step Process and Assessing the Performance and Emissions of
Jarernporn Thawornprasert1, Sutthichai Khamhuatoey1, Krit Somnuk1
1Department of Mechanical and Mechatronics Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90110.
ACS Omega
|May 5, 2025
Summary
This study optimized transesterified pyrolysis bio-oil (TPB) blends for diesel engines. A D30B60TPB10 blend showed comparable performance to diesel with reduced emissions, offering a promising biofuel alternative.
Area of Science:
- * Sustainable Energy
- * Chemical Engineering
- * Automotive Engineering
Background:
- * Pyrolysis bio-oil (PBO) from palm fruits requires upgrading for engine use.
- * Transesterification is key to producing methyl ester (ME) for biofuel blends.
- * Optimizing TPB production enhances its viability as a diesel substitute.
Purpose of the Study:
- * To investigate the performance and emissions of diesel-TPB blends in diesel engines.
- * To optimize the transesterification process for producing high-purity TPB.
- * To evaluate TPB as a sustainable biofuel for agricultural applications.
Main Methods:
- * Pyrolysis of palm fruits to obtain PBO.
- * Two-step esterification and transesterification to produce TPB.
- * Response surface methodology to optimize TPB production parameters (methanol content, KOH loading, reaction time).
- * Engine performance and exhaust gas emission testing of fuel blends.
Main Results:
- * Optimal TPB production achieved 74.35 wt % ME purity under specific conditions.
- * The D30B60TPB10 blend demonstrated similar engine performance to diesel.
- * Compared to diesel, the D30B60TPB10 blend showed improved brake-specific fuel consumption and brake thermal efficiency.
- * Significant reductions in CO2 and NOx emissions were observed with the D30B60TPB10 blend.
Conclusions:
- * Optimized TPB is a viable component in diesel-biodiesel blends.
- * The D30B60TPB10 blend offers a promising low-emission alternative biofuel.
- * These blends could benefit agricultural engines and rural communities.
