Five national standards for gasoline , petroleum products and by national experts test verification Lubricants Standardization Technical Committee , drafted with reference to European standards . National Standards Committee , the official said , compared with the national standards for gasoline four major changes in the new standards can be summarized as " three down a two- tone increases ."
According to special margin silicone fan clutch is understood that " three down " refers to reducing the sulfur content limit indicators , manganese content , olefin content . Index limits the sulfur content of 50ppm reduced by the country four 10ppm, per kilogram of sulfur content no higher than 10 mg, 80% lower ; manganese content index limits the country, four of 8mg / L reduced to 2mg / L, and prohibits artificially added manganese additives ; olefin content of 28% by the four countries is reduced to 24%.
" Two tone" , refers to the vapor pressure and grades adjusted. To prevent winter because the vapor pressure is too low to affect the car engine cold start performance , winter vapor pressure limit was increased from four countries 42kpa to 45kpa. To further reduce gasoline emissions of volatile organic substances , summer vapor pressure limit reduced from four countries of 68kpa to 65kpa, and the provisions of Guangdong, Guangxi and Hainan, the annual summer vapor pressure to perform .
" An increase " refers to further ensure that the vehicle fuel economy is relatively stable, the new standard defines the density index for the first time , its value at 20 ℃ 720 ~ 775kg/m3.
With the escalation of the quality of gasoline , sulfur and olefin content reduction and prohibition of human manganese agents will cause gasoline octane loss. A director of the National Standards Committee丁吉pillar industries that lack the resources of high-octane , lower grades of gasoline from the actual departure of the refining industry . According to the country five standard gasoline , refiners should make every effort to make up for loss of octane ultra-low curing . In addition, by adjusting the grades of gasoline plus manganese solve ban brought octane loss .
This year, the bad weather caused haze community to speed up the upgrading of the quality of oil called for the standards development work also accelerated the pace . After the implementation of the new standard gasoline , what will bring improvements in air quality is an issue people are most concerned about .
And national standards for gasoline over the four , five national standards significantly reduce sulfur content. According to the National Standards Commission estimates, the implementation of the new standards will significantly reduce emissions from vehicles , the vehicles are expected to reduce emissions of about 300,000 tons of nitrogen oxides per year , 5-year cumulative new car emissions of about 90,000 tons of nitrogen oxides . There are tests show that some cities the air about 20% of PM2.5 from motor vehicle exhaust .
Four petrol and national quality standards than the national standards in five never greater than 50ppm sulfur content significantly reduced to not more than 10ppm. According to the National Standards Commission estimates, the implementation of the new standards will significantly reduce emissions from vehicles , the vehicles are expected to reduce emissions of about 300,000 tons of nitrogen oxides per year , 5-year cumulative new car emissions of about 90,000 tons of nitrogen oxides .
According to special silicone fan clutch Yu noted , there are tests show that some cities the air about 20% of PM2.5 from motor vehicle exhaust . Environmental Standards Division Department of Science and Technology said earlier , tested , even if the existing car without any transformation, used in accordance with the fifth stage of the standard gasoline and diesel vehicle exhaust emissions will also be reduced about 10%.
" A move to upgrade the quality of oil alone is difficult to effectively inhibit contamination ." China Energy Research Society vice president , said Zhou Dadi , accelerate the upgrade of the quality of oil is an important means to reduce emissions and prevent fog and haze , improve air quality . But fundamentally improve air quality, still need to improve the energy consumption structure , upgrading the industrial structure and the development of public transport and many other measures to forge ahead.
Gasoline country five standards prohibit an obvious feature is artificially added manganese additives.
Agent is methyl cyclopentadienyl manganese tricarbonyl manganese in short, is to improve the octane number of gasoline antiknock additive to improve . According to the country four standard 8 milligrams per liter of gasoline added manganese agent octane gasoline grades can improve the performance of 1 to 1.5 units.
Chinese Academy of Engineering , the National Petroleum Products and Lubricants Standardization Technical Committee chairman , said Cao Xianghong , manganese agent to improve the grade of gasoline refining enterprises with less expensive means to improve the profitability level. However, after adding manganese agent, automotive combustion products are found in the engine intake valves , spark plugs, and other parts of piston deposits, engine performance and emissions impact , and will be deposited in the exhaust gas catalytic converters , catalyst performance.
