What Are Diesel Emissions?

Diesel exhaust refers to the exhaust emitted by diesel engines after burning diesel. The exhaust contains hundreds of different compounds. This kind of gas emissions not only have weird odors, but also make people feel dizzy and nauseous, affecting people's health. Experts from the World Health Organization believe that diesel engine exhaust is as carcinogenic as asbestos and arsenic. ^[1]

The main emissions of diesel engines are PM (particulate matter) and NOx, while CO and HC emissions are lower. Controlling diesel exhaust emissions is mainly to control the generation of particulate matter PM and NO and reduce direct emissions of PM and NOx. Compared with diesel engines of the same power, diesel and NOx are the two most important pollutants in emissions. At present, countries around the world are working on technology research to reduce diesel particulate emissions, and have made substantial progress. Due to the different mechanism of diesel exhaust particulates and NOx formation, reducing particulates increases NOx emissions. At the same time, the reduction of particulates effectively suppresses catalyst poisoning, which makes it possible to purify NOx using off-board catalytic technology. ^[3]

The diesel exhaust pollutants mainly include:

Many people are exposed to diesel engine exhaust from various sources such as motor vehicles, trains, ships and generators in daily life and work. Diesel emissions are highly hazardous.

Research on the principle, method and technology of catalytic purification of diesel exhaust pollutants is one of the hot and difficult topics in the field of environmental catalysis in the world today. With the increasingly strict environmental protection regulations, the pollution of diesel exhaust pollutants to the environment and the harm to human health are receiving more and more attention.

The exhaust from diesel engines is a carcinogen. It is recommended that countries around the world formulate more stringent standards, vigorously limit the exhaust of diesel engines, and work hard to reduce its harm.

The International Agency for Research on Cancer has increased the carcinogenic hazard rating of diesel engine exhaust from the category of "possible carcinogens" classified in 1988 to "identified carcinogenic" categories.

The International Agency for Research on Cancer said that it hopes that the reclassification will provide reference for governments and other policy makers, promote a more reasonable standard based on science, strengthen restrictions on diesel engine exhaust emissions, and encourage manufacturers to conduct Technical innovation in order to reduce the harm of diesel generator exhaust to humans.

The main mission of the International Agency for Research on Cancer is to carry out and promote research on the cause of cancer, as well as to carry out worldwide epidemiological investigations and research on cancer. The carcinogenicity hazards graded by the agency are divided into 4 categories. The first category is to determine carcinogenicity to humans, the second category is likely or likely to be carcinogenic to humans, and the third category is lack of sufficient evidence to determine whether it is carcinogenic to humans The fourth category is most likely not carcinogenic to humans. Factors involved include chemicals, mixtures, radiation, physical and biological agents. ^[4]