Coşman Sertaç, Emen Fatih Mehmet, Yeşilkaynak Tuncay
Department of Mechanical Engineering, Faculty of Engineering and Architecture, Burdur Mehmet Akif Ersoy University, Burdur 15200, Turkey.
Department of Chemistry, Faculty of Arts and Sciences, Burdur Mehmet Akif Ersoy University, Burdur 15200, Turkey.
ACS Omega. 2025 Aug 18;10(33):37366-37382. doi: 10.1021/acsomega.5c03007. eCollection 2025 Aug 26.
In this study, a novel compound 2-chloro--((6-methylpyridin-2-yl)-carbamothioyl)-benzamide (CMPB) was synthesized and characterized via FT-IR, H NMR and C NMR techniques. For the first time, CMPB was evaluated as a potential fuel additive in gasoline, dissolved in dichloromethane (DCM), to investigate its effects on the performance and emissions of a single-cylinder, four-stroke gasoline engine under varying load conditions. This work introduces a new class of benzoylthiourea-based additives to internal combustion engine applications, filling a gap in current fuel additive research. Five fuel blends were tested: pure gasoline (G), G + DCM, and G + DCM with 50, 100, and 200 ppm of CMPB. The results demonstrate that CMPB significantly enhances combustion efficiency and reduces harmful emissions, with 100 ppm of CMPB identified as the optimal concentration for most parameters. At 100% engine load, thermal efficiency increased from 20.10% (G) to 21.06% (G + DCM + 50 ppm of CMPB) and 20.54% (G + DCM + 200 ppm of CMPB), while specific fuel consumption (SFC) decreased from 454.50 g/kWh (G) to 387.12 g/kWh (G + DCM + 100 ppm of CMPB), reflecting improved energy utilization. CO and HC emissions decreased substantially with CMPB addition, with CO emissions dropping from 1.42% (G) to 0.88% (G + DCM + 100 ppm of CMPB) and HC emissions reducing from 69 ppm (G) to 40 ppm (G + DCM + 100 ppm of CMPB) at 100% load. Conversely, NO emissions increased, with the 100 ppm of CMPB blend producing 1999 ppm at 100% load compared to 2000 ppm for gasoline, indicating a slight reduction. Oxygen emissions (O) in the exhaust rose with CMPB addition, reaching 1.61% (G + DCM + 100 ppm of CMPB) and 1.69% (G + DCM + 200 ppm of CMPB) at full load, suggesting leaner combustion. The results highlight the trade-off between reducing CO and HC emissions and increased NO emissions due to higher combustion temperatures. The 100 ppm of CMPB blend provided the best balance, optimizing thermal efficiency and fuel consumption while managing emissions effectively. These findings underscore the potential of CMPB as a novel fuel additive to enhance engine performance and environmental sustainability and pave the way for further research aimed at mitigating NO emissions through advanced combustion control or after-treatment systems.
在本研究中，合成了一种新型化合物2-氯-((6-甲基吡啶-2-基)-氨基硫甲酰基)-苯甲酰胺（CMPB），并通过傅里叶变换红外光谱（FT-IR）、氢核磁共振（¹H NMR）和碳核磁共振（¹³C NMR）技术对其进行了表征。首次将溶解于二氯甲烷（DCM）中的CMPB作为汽油中的潜在燃料添加剂进行评估，以研究其在不同负载条件下对单缸四冲程汽油发动机性能和排放的影响。这项工作将一类新型的苯甲酰硫脲基添加剂引入到内燃机应用中，填补了当前燃料添加剂研究的空白。测试了五种燃料混合物：纯汽油（G）、G + DCM以及添加了50 ppm、100 ppm和200 ppm CMPB的G + DCM。结果表明，CMPB显著提高了燃烧效率并减少了有害排放，100 ppm的CMPB被确定为大多数参数的最佳浓度。在100%发动机负载下，热效率从20.10%（G）提高到21.06%（G + DCM + 50 ppm CMPB）和20.54%（G + DCM + 200 ppm CMPB），而比油耗（SFC）从454.50 g/kWh（G）降至387.12 g/kWh（G + DCM + 100 ppm CMPB），这反映出能源利用得到改善。添加CMPB后，一氧化碳（CO）和碳氢化合物（HC）排放大幅下降，在100%负载下，CO排放从1.42%（G）降至0.88%（G + DCM + 100 ppm CMPB），HC排放从69 ppm（G）降至40 ppm（G + DCM + 100 ppm CMPB）。相反，氮氧化物（NOₓ）排放增加，在100%负载下，添加100 ppm CMPB的混合物产生1999 ppm的NOₓ，而汽油为2000 ppm，略有降低。排气中的氧排放（O₂）随着CMPB的添加而增加，在满负荷时达到1.61%（G + DCM + 100 ppm CMPB）和1.69%（G + DCM + 200 ppm CMPB），表明燃烧更稀。结果突出了由于燃烧温度升高，在减少CO和HC排放与增加NOₓ排放之间的权衡。100 ppm CMPB的混合物提供了最佳平衡，优化了热效率和燃料消耗，同时有效控制了排放。这些发现强调了CMPB作为新型燃料添加剂在提高发动机性能和环境可持续性方面的潜力，并为通过先进的燃烧控制或后处理系统减轻NOₓ排放的进一步研究铺平了道路。
