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Effect of Cetane Number Increase Due to Additives on NOx Emissions from Heavy-Duty Highway Engines
| 题名： | Effect of Cetane Number Increase Due to Additives on NOx Emissions from Heavy-Duty Highway Engines |
| 作者： | empty |
| 关键词： | Cetane number##Nox emissions##Heavy-Duty Highway Engines##Diesel & gasoline engine oils##Additives##Effectiveness analysis##Methodology## |
| 摘要： | This report presents a technical analysis of the NOx emissions impacts of increases in cetane number brought about through the use of diesel fuel additives. The purpose of this technical report is to provide information to parties who may be evaluating the value, effectiveness, and appropriateness of the use of cetane improver additives. It was originally provided to the public in draft form so that interested parties could comment on the methodology, assumptions, and conclusions. Where deemed appropriate, modifications were made to the report on the basis of those comments. This technical report is now being released in final form. The analysis described in this report uses statistical regression analysis to correlate diesel cetane number increases brought about through additives with NOx emissions from heavy-duty highway engines. It relies upon pre-existing data from publicly available sources. The result is that the effect of cetane improver additives on NOx emissions can be predicted for the in-use fleet using a correlation which is a function of the natural cetane number of the un-additized base fuel and the increase in cetane number brought about through additives. These NOx emission effects are also a function of the calendar year in order to account for lower cetane sensitivity of advanced technology engines. For instance, if cetane improves are added to a national average base fuel so that the total cetane number is increased by 5 numbers, the percent reduction in NOx for calendar year 2003 is predicted to be 2.0 for highway engines. The correlations predict lower NOx benefits for future calendar years. Non-road engines may exhibit slightly higher NOx benefits due to the slower introduction of cetane-insensitive technologies into the non-road fleet. |
| 总页数： | 42 |
| 报告类型： | 科技报告 |
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