Functional Composite Materials For Activating And Combustion Supporting

It was aimed at the problems of the petroleum resources shortage and environment pollution by the car industry development. In this work, a new type of material that could improve the physicochemical properties of fuel oil, enhance combustion efficiency and reduce exhaust gas was studied. Influencing factors and mechanism for the infrared radiation of the composite materials and the effects of the material on the physicochemical properties of fuel oil and oil consumption and exhaust gas discharge of car were studied.The effects of the rare earth content and heat treatment temperature on the far infrared radiation and the physicochemical properties of fuel oil were studied. The results showed that (1) the infrared radiance of as-prepared composite materials was highest 0.92～0.93 when the rare earth in composite materials was about 6%~8% (wt) and heat treatment temperature is 750 ℃. (2) The composite materials which comprised about 6wt% rare earth and was heated at 750 ℃ influenced the physicochemical properties of fuel oil obviously. The evaporation of gasoline was increased by 0.69%, the surface tension was reduced by 1.45%, the voc content evaporated was increased by 18%;The viscosity and surface tension and flash point of the diesel oil treated by the composite materials was reduced by 1.18%, and 0.66%, and 1.8%~2.6%, respectively. The voc content evaporated was increased by 16%.The effects of the composite materials which comprised about 6wt% of rare earth and was heated at 750℃ on oil consumption and exhaust gas of car were studied. The oil-saving rate of the 492QA engine was 2.8%~3.7%. In idling emission experiment of the car, the reducing rate of CO and HC in the exhaust gas was 38.5% and 20.1% at speed of 800 r/min and was 9.1% and 16.1% at speed of 2000r/min. At working condition, the reducing rate of CO and HC and NOx in the exhaust gas was 17% and 22.3% and 4%.The mechanisms of enhancing combustion efficiency and reducing exhaust gas of the composite material were studied. It was attributed to the far infrared radiated by the cooperationbetween rare earth and tourmaline, which reduced surface tension and enhanced molecular vibration speed to improve the atomization and gasification of gasoline, and accelerated the producing of the free radicals at gasoline combustion process.