Reductions in Unburned Ammonia and Nitrous Oxide Emissions from an Ammonia Assisted Diesel Engine with Early Timing Diesel Pilot Injection
Reductions in Unburned Ammonia and Nitrous Oxide Emissions from an Ammonia Assisted Diesel Engine with Early Timing Diesel Pilot Injection
复制标题
通过早期正时柴油先导喷射减少氨辅助柴油机中未燃烧的氨和一氧化二氮的排放
DOI：
10.1115/1.4051002
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Niki Yoichi
中科院分区：
文献类型：
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作者：
太田博光;高田寛大;福井良輔;長橋尚也;山田雄太;Niki Yoichi
全球限制气候变化影响的努力为减少二氧化碳排放提供了强有力的动力。氢气是最清洁的能源之一，因为它的燃烧不会产生二氧化碳。众所周知，nh3储存和携带h23，燃烧时不产生co2。nh3已被研究用作替代燃料和用于内燃机。对使用nh3 -柴油双燃料的nh3辅助柴油发动机nh3和N2O排放的研究很少。nh3和N2O造成空气污染，对人体有毒；因此，这些污染物应减少到可接受的水平。此外，N2O是一种具有较高全球变暖潜势的温室气体。在这项研究中，开发了一种燃烧策略，以减少nh3辅助柴油发动机的nh3和N2O排放。在我们的反应性控制压缩点火燃烧策略中，nh3和柴油分别作为低反应性和高反应性燃料。本文报道了从对柴油点火和nh3分解的化学过程的理解中获得的见解。实验揭示了提前柴油中导喷油时间对排放和燃烧性能的影响，以及通过改变柴油喷油量和NH3来操纵燃烧相位。最后，考虑到N2O的全球变暖效应，使用采用所提出的燃烧策略的nh3辅助柴油发动机估算了温室气体排放量的减少。
The global drive to limit the effects of climate change affords a strong incentive to reduce CO2emissions. H2is one of the cleanest energy sources, because its combustion does not produce CO2. It is well known that NH3stores as well as carries H2and does not produce CO2on combustion. NH3has been investigated for its use as an alternative fuel and for use in internal combustion engines. Investigations of NH3and N2O emissions from NH3-assisted diesel engines operated using NH3–diesel dual fuel have been scarce. NH3and N2O cause air pollution and are toxic to humans; therefore, these pollutants should be reduced to acceptable levels. In addition, N2O is a greenhouse gas with high global warming potential. In this study, a combustion strategy was developed to reduce NH3and N2O emissions from an NH3-assisted diesel engine. NH3and diesel fuel worked as low- and high-reactivity fuels, respectively, in our strategy for reactivity-controlled compression ignition combustion. The present paper reports the insights obtained from an understanding of the chemical processes of diesel fuel ignition and NH3decomposition. Experiments revealed the effects of advancing diesel pilot injection timing on emissions and combustion performance, and the manipulation of combustion phasing using a change in the amount of injected diesel fuel and NH3. Finally, the reduction in greenhouse gas emissions considering the global warming effects of N2O was estimated using an NH3-assisted diesel engine that applied the proposed combustion strategy.