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An oxygenating additive for improving the performance and emission characteristics of marine diesel engines

机译：用于改善船用柴油机性能和排放特性的氧化添加剂

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Diesel engines provide the major power sources for marine transportation and contribute to the prosperity of the worldwide economy. However, the emissions from diesel engines also seriously threaten the environment and are considered one of the major sources of air pollution. The pollutants emitted from marine vessels are confirmed to cause the ecological environmental problems such as the ozone layer destruction, enhancement of the greenhouse effect, and acid rain, etc. Marine diesel engine emissions such as particulate matter and black smoke carry carcinogen components that significantly impact the health of human beings. Investigations on reducing pollutants, in particular particulate matter and nitrogen oxides are critical to human health, welfare and continued prosperity. The addition of an oxygenating agent into fuel oil is one of the possible approaches for reducing this problem because of the obvious fuel oil constituent influences on engine emission characteristics. Ethylene glycol monoacetate was found to be a promising candidate primarily due to its low poison and oxygen-rich composition properties. In this experimental study ethylene glycol monoacetate was mixed with diesel fuel in various proportions to prepare oxygenated diesel fuel. A four-cylinder diesel engine was used to test the engine performance and emission characteristics. The influences of ethylene glycol monoacetate ration to diesel oil, inlet air temperature and humidity parameters on the engine's speed and torque were considered. The experimental results show that an increase in the inlet air temperature caused an increase in brake specific fuel consumption (BSFC), carbon monoxide, carbon dioxide emission, and exhaust gas temperature, while decreasing the excess air, oxygen and nitrogen oxide emission concentrations. Increasing the inlet air humidity increased the carbon monoxide concentration while the decreased excess air, oxygen and nitrogen oxide emission concentrations. In addition, increasing ethylene glycol monoacetate ratio in the diesel fuel caused an increase in the BSFC while the excess air and oxygen emission concentrations decreased.
机译：柴油发动机为海上运输提供了主要动力，为世界经济的繁荣做出了贡献。然而，柴油发动机的排放也严重威胁环境，被认为是空气污染的主要来源之一。经确认，从船舶排放的污染物会引起生态环境问题，例如破坏臭氧层，增强温室效应和酸雨等。船用柴油发动机的排放物（如颗粒物和黑烟）会携带大量致癌物质人类的健康。减少污染物，特别是减少颗粒物和氮氧化物的研究对于人类健康，福利和持续繁荣至关重要。在燃料油中添加氧化剂是减少该问题的可能方法之一，因为明显的燃料油成分会影响发动机的排放特性。乙二醇单乙酸酯被发现是有希望的候选者，主要是由于其低毒和富氧组成特性。在该实验研究中，将乙二醇单乙酸酯与柴油以各种比例混合以制备含氧柴油。使用四缸柴油发动机测试发动机性能和排放特性。考虑了乙二醇单乙酸酯配比对柴油，进气温度和湿度参数对发动机转速和扭矩的影响。实验结果表明，进气温度的升高导致制动比燃料消耗（BSFC），一氧化碳，二氧化碳排放和废气温度的升高，同时降低了过量的空气，氧气和氮氧化物的排放浓度。入口空气湿度的增加会增加一氧化碳的浓度，而多余的空气，氧气和氮氧化物的排放浓度会降低。此外，柴油中乙二醇单乙酸酯比例的增加导致BSFC的增加，而过量的空气和氧气排放浓度降低。

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