School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, 255000, China.
Environ Sci Pollut Res Int. 2023 Dec;30(59):124204-124214. doi: 10.1007/s11356-023-31115-1. Epub 2023 Nov 24.
The use of n-pentanol/biodiesel as a diesel engine fuel is one of the important ways to reduce fossil fuel consumption and lower diesel engine emissions. The objective of this work was to investigate the mechanism of the effect of different n-pentanol blending ratios (0%, 10%, 20%, and 30%) on the combustion and emission performance of a common rail diesel engine. Tests were conducted on a four-cylinder supercharged intercooled diesel engine at 1540 r/min with brake mean effective pressures of 0.289, 0.578, and 0.867 MPa. The results showed that with the increase of the n-pentanol blending ratio, the ignition delay was prolonged, the combustion duration was shortened, and the heat release center was shifted forward. The combustion process at medium and high loads was improved. When the blending ratio of n-pentanol reached 20%, the blended fuel showed better combustion characteristics at all three loads, and the peak in-cylinder pressure of the blended fuel increased by 13.74%, 1.95%, and 5.26% at the three loads, respectively, compared with that of pure biodiesel. With the increase of the n-pentanol blending ratio, HC, CHO, CH, and CHCHO emissions increased at all three loads. Soot emission was reduced by 25.86%, 19.71%, and 31.59% at three loads when the n-pentanol blending ratio was 30%. CH emissions increased with the increase of n-pentanol blending ratio at the low-load condition and showed a decreasing tendency at the medium and high loads. At high load conditions, NO emissions increased with increasing n-pentanol blending ratio, and CO emissions decreased with increasing n-pentanol blending ratio.
正戊醇/生物柴油作为柴油机燃料的使用是减少化石燃料消耗和降低柴油机排放的重要途径之一。本工作的目的是研究不同正戊醇掺混比（0%、10%、20%和 30%）对共轨柴油机燃烧和排放性能的影响机制。在 1540 r/min 和制动平均有效压力为 0.289、0.578 和 0.867 MPa 的四缸增压中冷柴油机上进行了试验。结果表明，随着正戊醇掺混比的增加，滞燃期延长，燃烧持续期缩短，燃烧放热中心提前。中高负荷燃烧过程得到改善。当正戊醇掺混比达到 20%时，掺混燃料在所有三种负荷下均表现出更好的燃烧特性，掺混燃料的缸内压力峰值分别比纯生物柴油提高了 13.74%、1.95%和 5.26%。随着正戊醇掺混比的增加，在所有三种负荷下，HC、CHO、CH 和 CHCHO 的排放量均增加。当正戊醇掺混比为 30%时，在三种负荷下，碳烟排放量分别降低了 25.86%、19.71%和 31.59%。在低负荷条件下，随着正戊醇掺混比的增加，CH 排放量增加，而在中高负荷条件下，CH 排放量呈下降趋势。在高负荷条件下，随着正戊醇掺混比的增加，NO 排放量增加，CO 排放量随着正戊醇掺混比的增加而减少。
