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Quantification of Uncertainty in Reactivity Adjustment Factors from Reformulated Gasolines and Methanol Fuels

机译:重新配制的汽油和甲醇燃料中反应性调节因子的不确定度定量

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摘要

Speciated data for motor vehicle exhaust emissions of volatile organic compounds (VOCs) have been combined with estimates of uncertainty in the calculated photochemical reactivities of the VOCs to evaluate the resulting uncertainty in the overall reactivity of the exhaust. Mean reactivity adjustment factor (RAF) values for exhaust emissions from reformulated gasolines relative to conventional gasoline ranged from 0.85 to 0.93, with uncertainties of about 10% at the 1σ level. The mean RAF value for M85 (85% methanol, 15% gasoline) in variable/flexible-fueled vehicles relative to emissions from gasoline in conventional vehicles was 0.42, with an uncertainty of 17%. For the gasoline-based fuels, the variability of the exhaust composition data was a major contributor to the uncertainty in the RAFs. For M85, rate constant uncertainties in the reactivities of the VOCs in the exhaust contributed almost two-thirds of the total uncertainty in the RAF values.
机译:挥发性有机化合物(VOC)的机动车尾气排放的特定数据已与所计算出的VOC的光化学反应性的不确定性估计值相结合,以评估由此产生的废气总体反应性的不确定性。重新配制的汽油相对于传统汽油的废气排放的平均反应性调节因子(RAF)值在0.85至0.93的范围内,在1σ的水平下不确定度约为10%。可变/灵活燃料车辆中M85(85%甲醇,15%汽油)的平均RAF值相对于传统车辆中的汽油排放为0.42,不确定度为17%。对于基于汽油的燃料,排气成分数据的可变性是造成英国皇家空军不确定性的主要因素。对于M85,排气中VOC的反应性的速率常数不确定性几乎占RAF值总不确定性的三分之二。

著录项

  • 来源
    《Environmental Science & Technology》 |1996年第1期|p.196-203|共8页
  • 作者单位

    Department of Civil and Environmental Engineering, University of Connecticut, Storrs, Connecticut 06269;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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