Comparative evaluation of the effect of butanol–diesel and pentanol–diesel blends on carbonaceous particulate composition and particle number emissions from a diesel engine
Comparative evaluation of the effect of butanol–diesel and pentanol–diesel blends on carbonaceous particulate composition and particle number emissions from a diesel engine
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DOI：
10.1016/j.fuel.2016.02.061
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发表时间：
2016-07
期刊：
影响因子：
7.4
通讯作者：
Zhihui Zhang;S. Chua;R. Balasubramanian
中科院分区：
文献类型：
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作者：
Zhihui Zhang;S. Chua;R. Balasubramanian
本研究的目的是比较评估将丁醇和戊醇与超低硫柴油 (ULSD) 以 10% 和 20% 的体积混合对单缸直喷柴油发动机的发动机性能、颗粒质量和计数排放以及碳质颗粒成分的影响。发动机在恒定发动机转速和三个发动机负载下运行。结果表明制动燃料消耗率 (BSFC) 和制动热效率 (BTE) 略有变化。与柴油相比，这两种混合燃料都能有效降低颗粒物质量和元素碳（EC）排放，以及挥发物和固体颗粒总数。此外，在混合燃料中丁醇或戊醇比例相同的情况下，丁醇-柴油混合物比戊醇-柴油混合物具有更高的抑制EC形成的潜力，并且在固体和挥发性颗粒物的计数方面具有更高的减排量。然而，两种混合燃料的有机碳 (OC) 排放量略有下降，水溶性有机碳 (WSOC) 排放量显着增加，因此 OC/EC 和 WSOC/OC 比率较高。此外，添加丁醇和戊醇可减少总颗粒数排放，这是因为大于 50 nm 的颗粒数显着减少。然而，混合燃料中小于 50 nm 的颗粒略有增加或没有显着变化，而在低发动机负载下，20% 丁醇和戊醇混合物的直径小于 20 nm 的颗粒数量有所增加。
This study was undertaken to comparatively evaluate the effects of blending butanol and pentanol with ultralow sulfur diesel (ULSD) at 10% and 20% by volume on engine performance, emissions of particulate mass and counts, and carbonaceous particulate components from a single cylinder, direct injection diesel engine. The engine was operated at a constant engine speed and at three engine loads. The results indicate a marginal change in the brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE). Compared to diesel fuel, both the blended fuels can effectively reduce the particulate mass and elemental carbon (EC) emissions, and also total counts of volatile and solid particles. Moreover, with the same proportion of butanol or pentanol in the blended fuels, the butanol–diesel blend shows a higher potential to inhibit EC formation and a higher emission reduction in solid and volatile particles in terms of their counts than that of the pentanol–diesel blend. However, both of the blended fuels show a slight decrease in organic carbon (OC) emissions, a significant increase in water-soluble organic carbon (WSOC) emissions and therefore high OC/EC and WSOC/OC ratios. In addition, the reduction of total particle number emissions with the addition of both butanol and pentanol is a result of a significant reduction in the number of particles larger than 50 nm. However, the blended fuels show a slight increase in or no significant change in particles of less than 50 nm while the number of particles with diameter less than 20 nm increases for 20% butanol and pentanol blends at low engine load.