The Research Of Improvement Of Harm Emission When High Speed Diesel Engine Utilize Heavy Oil Mixed With Nanometer Rare Soil Element Oxides

As the continuously consumption of the resources of oil, the shortage of the product oil has caused more concerns than any time before, which should take responsibility for the increasing price of fuel product. It has a broad prospective of developing the crude oil’s utilization. From the process of oil refining, we can find that the huge amount of production of heavy oil turns it to be a kind of cheap fuel. However, we must face the problems of heavier air pollutions when the high and middle speed diesel engines use this kind of fuel. This thesis is mainly discuss the effects of using the rare soil elements oxidize as fuel additives and research the function of the additive for reducing the harm pollutions exhausted by the diesel engine.Now it is commonly known that the oxides of rare soil elements have sort of unique crystal lattice, meanwhile at the process of transition from Ce3+to Ce4+, the rare soil elements demonstrate a remarkable capability of storing and releasing oxygen element, which could help to promote the combustion process of the low quality fuel utilized in a diesel engine. Moreover, because of the fact that the rare soil elements also have significant characters of oxidize and reductive catalyst, the additives can help to reduce the density of the harm pollutant output by the diesel engines. The CeO2which was used in this experiment was composed through several chemical routes, after that, the compound of CeO2was made to the solid resolution of many other metal elements, which help to promote the CeO2solid resolution thermal steady significantly. The different samples of heavy oil with various fraction of catalyst joined into it were measured by the engine’s load characteristic test. And monitor the cylinder combustion process and the density of NO, CO, HC, carbon soot with relevant equipments. Analyze the functions of which the additives reduce the harm exhaust by comparing the difference of the test data on the engine’s running.The additives of nanometer CeO2solid resolutions have proved to be very effective for optimizing the heavy oil’s process of combustion in the cylinder and reducing the harm component of the exhaust gas. The heavy oil sample with additives on the engine test were observed for increasing the cylinder pressure, moving forward the fuel ignition moment, lowering the fuel consumption rate, which indicate that the additives bring some positive impact on combusting quality of heavy oil. Meanwhile, the exhaust gas test result also manifest that the density of carbon soot, NO, CO, HC were all dropped. According to the consequences of this experiment the additives good performance in heavy oil should be convinced.