What is the China VI Standard for Automotive Diesel?
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The China VI standard for diesel refers to reducing sulfur content to no more than 0.035%, eliminating the acidity index requirement, imposing fuel index requirements on automotive lubricity and fatty acid methyl esters, reducing the polycyclic aromatic hydrocarbon index to 7%, and further increasing the cetane number requirement to 49. Below is information on the China VI diesel standard: 1. Role of polycyclic aromatic hydrocarbons: The reduction of polycyclic aromatic hydrocarbons can effectively decrease vehicle pollutant emissions. Therefore, for diesel vehicles, the mass fraction standard of polycyclic aromatic hydrocarbons has been significantly reduced from 11% to 7%, while also improving the technology for detecting total pollutant content and raising the flash point index limit for diesel vehicles. 2. Fuel quality: For fuel quality, China VI gasoline and diesel have reduced the content of aromatic hydrocarbons and benzene, and added total pollutant index standards, meeting the current EU standards for automotive fuels, with some indicators even stricter than EU standards. After a series of adjustments to these indicators, China VI fuels can reduce carbon monoxide emissions by approximately 59% and hydrocarbon emissions by about 42%, significantly mitigating the negative impact of vehicle emissions on the atmospheric environment.