The constant emergence of smog days makes blue sky and white clouds a luxury. According to the website of the Shaanxi Provincial Government, the Shaanxi Provincial Development and Reform Commission and the Provincial Environmental Protection Department recently issued the “Notice on the Quality Upgrading of Air Pollution Prevention and Control Products in Shaanxi Provinceâ€, and decided to implement the fuel supply for all vehicles in Shaanxi Province from October 1st. standard. How much oil quality upgrade can contribute to reducing smog?
The National V Gasoline Standard Reduces the Octane Index. The reporter learned that there are 6 technical indicators changes in the gasoline IV to the vehicle gasoline V. The sulfur content, olefin content reduction and vapor pressure adjustment are beneficial to reduce the exhaust emissions of automobiles. Sulfur oxides, particulate matter content and vapor emissions, reduced manganese content is beneficial to reduce the wear of automotive combustion chambers, intake valves and spark plugs, but the reduction of gasoline sulfur, olefin and manganese content brings octane loss, so The National V Gasoline standard reduces the octane rating.
According to experts, the vehicle diesel has crossed the transition of Section IV, directly from the country III to the country V, and the limits of the sulfur content and cetane number have changed greatly. Sulfur content is reduced from no more than 350 mg/kg (ppm) to no more than 10 mg/kg (ppm), and sulfur oxide emissions from exhaust emissions after diesel combustion are greatly reduced. The diesel cetane number of each grade V of the country V is increased by 2 to 3 units compared with the corresponding country III. The combustion and combustion stability of the diesel will be improved, and the exhaust emissions will be correspondingly reduced.
After the vehicle is used to reduce nitrogen oxides by about 300,000 tons, it is reported that the new standard can be used to reduce nitrogen oxides by about 300,000 tons per year. The new car can reduce nitrogen oxides by about 90,000 tons in five years. The PM2.5 emissions will also decrease. Therefore, the use of new oil products will also contribute to the blue sky and white clouds in the city.
It is understood that since sulfur dioxide is a very important pollutant in automobile exhaust, it will be present as particulate matter when discharged into the air, which is one of the "culprits" of smog. In general, vehicle exhaust emissions account for 20% to 30% of total urban pollutants. Compared with the national IV gasoline quality standard, the biggest advantage of the national V is the reduction of sulfur content. After upgrading to the national V gasoline, the sulfur content emitted by the motor vehicle and the like into the atmosphere will be reduced by about 80% compared with the national IV gasoline.
Standard changes have no impact on users. The reporter learned that CNPC Shaanxi Sales Company has formulated a plan to steadily promote the upgrading and replacement of domestic V refined oil products. As of the end of September, there have been more than 800 gas stations in the province that have completed gasoline upgrades and replacements. The work progress has been completed 98%, and the upgrade and replacement of gasoline can be completed before October 1. In order to guarantee the supply of gasoline in the country of Xi'an, it is planned to allocate 50,000 tons of gasoline resources in the Xi'an market to meet the holiday market demand.
After the implementation of the national V gasoline, the other indicators except the brand are mainly to reduce environmental pollution, and have no significant impact on the specific performance. Gasoline grades changed from 90, 93, 97 to 89, 92 and 95. It is reported that the choice of gasoline grade is based on the compression ratio. The automobile manufacturer will test the recommended gasoline grade in the test before the factory and in practice, so the gasoline grade recommended according to the automobile manual is scientific. For automotive diesel users, the standard change has no effect on the choice of use, just select the appropriate diesel grade according to the ambient temperature.
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