Effect of Several Oxygenates on Regulated Emissions from Heavy-Duty Diesel Engines
Effect of Several Oxygenates on Regulated Emissions from Heavy-Duty Diesel Engines
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DOI：
10.1021/es9606438
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发表时间：
1997-03
影响因子：
11.4
通讯作者：
R. McCormick;J. D. Ross;M. Graboski
中科院分区：
文献类型：
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作者：
R. McCormick;J. D. Ross;M. Graboski
含氧化合物可显著减少柴油发动机的颗粒物（PM-10）排放，但在大多数情况下也会导致氮氧化物排放增加。在这项工作中，几种具有广泛性质的含氧化合物与2号柴油在1和2wt%的氧水平下共混。使用美国重型瞬态试验（40 CFR，第86部分，子部分N）的热启动部分在2冲程和4冲程发动机中测量排放。结果发现，在这个氧含量下，PM的减少量约为10 - 15%，而不管其化学结构如何。含氧化合物对NOx综合排放的影响不同。大豆油的甲酯使氮氧化物增加2 - 3%，癸酸没有影响，辛醇可能使氮氧化物略有减少。辛醇和大豆酯的真实的时间NOx浓度数据的检查表明，在发动机在低速下产生高扭矩而很少或没有涡轮增压的循环部分期间，两种含氧化合物都增加NOx。
Oxygenates produce a significant reduction in emissions of particulate matter (PM-10) from diesel engines but in most cases also cause the nitrogen oxide emissions to increase. In this work, several oxygenates having a wide range of properties were blended with no. 2 diesel at the 1 and 2 wt % oxygen level. Emissions were measured using the hot start portion of the U.S. Heavy-Duty Transient Test (40 CFR, Part 86, Subpart N) in both a 2-stroke and a 4-stroke engine. It was found that at this oxygen level PM reductions on the order of 10−15% were obtained regardless of oxygenate chemical structure. The oxygenates affected the integrated NOx emissions differently. Methyl esters of soybean oil increased NOx 2−3%, decanoic acid had no effect, and octanol may have slightly decreased NOx. Examination of real time NOx concentration data for octanol and soy esters indicates that both oxygenates increase NOx during portions of the cycle where the engine is generating high torque at low speed with little or no turbo...