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<p>This work examines the efficacy of di-methyl carbinol (DMC) as an oxygenated additive aimed at enhancing the combustion efficiency and emission attributes of biodiesel synthesized from caesalpinia bonduc (<i>Nicker Bean</i>) seed oil, a non-consumable and sustainable feedstock. Biodiesel was generated utilizing a dual-stage transesterification methodology and subsequently blended with DMC at concentrations of 20% and 40%. The physicochemical characteristics of the resultant blends were analyzed in accordance with established protocols, and performance assessments, along with emission evaluations, were performed on a single-cylinder diesel engine under diverse loading circumstances. The findings indicated that the incorporation of DMC facilitated an enhancement in Brake Thermal Efficiency (BTE) by as much as 3.5% while concurrently diminishing Brake-Specific Fuel Consumption (BSFC) by 3%. The discharge of carbon monoxide (CO) and hydrocarbons (HC) was diminished by 8% and 5%, respectively, in comparison to unadulterated biodiesel. Nevertheless, a marginal elevation in nitrogen oxide (NOx) emissions was noted, which can be attributed to elevated combustion temperatures. These results underscore the promise of di-methyl carbinol-enhanced Nicker Bean biodiesel (NBOBD) as a more environmentally friendly and efficient alternative fuel. Future investigations should focus on the engine's long-term durability and the incorporation of advanced NOx mitigation techniques, such as exhaust gas recirculation (EGR).</p>

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Study on the Effect of Oxygenated Additives in Nicker Bean Biodiesel Blends for Reduced Emissions

  • 期刊论文

  • 发表日期：

    2025年4月28日

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  • D. Christopher Selvam,
  • Dinesh Babu Munuswamy,
  • Ganesan Subbiah,
  • Beem Kumar Nagappan,
  • Arpit Arora,
  • Ruby Mishra,
  • Yuvarajan Devarajan

摘要

This work examines the efficacy of di-methyl carbinol (DMC) as an oxygenated additive aimed at enhancing the combustion efficiency and emission attributes of biodiesel synthesized from caesalpinia bonduc (Nicker Bean) seed oil, a non-consumable and sustainable feedstock. Biodiesel was generated utilizing a dual-stage transesterification methodology and subsequently blended with DMC at concentrations of 20% and 40%. The physicochemical characteristics of the resultant blends were analyzed in accordance with established protocols, and performance assessments, along with emission evaluations, were performed on a single-cylinder diesel engine under diverse loading circumstances. The findings indicated that the incorporation of DMC facilitated an enhancement in Brake Thermal Efficiency (BTE) by as much as 3.5% while concurrently diminishing Brake-Specific Fuel Consumption (BSFC) by 3%. The discharge of carbon monoxide (CO) and hydrocarbons (HC) was diminished by 8% and 5%, respectively, in comparison to unadulterated biodiesel. Nevertheless, a marginal elevation in nitrogen oxide (NOx) emissions was noted, which can be attributed to elevated combustion temperatures. These results underscore the promise of di-methyl carbinol-enhanced Nicker Bean biodiesel (NBOBD) as a more environmentally friendly and efficient alternative fuel. Future investigations should focus on the engine's long-term durability and the incorporation of advanced NOx mitigation techniques, such as exhaust gas recirculation (EGR).