Green and clean energy are gradually replacing traditional fossil energy sources and become the protagonists of human social progress. However, like fossil energy, the use of clean energy also has emission problems, but emissions and hazards are different. Since ethanol released into the atmosphere when using biofuels tends to change to acetaldehyde, acetaldehyde is very easy to react chemically and is considered to be harmful to human health. Therefore, attention should be paid to the problem of emissions in the use of clean energy. Before it happens, avoid serious consequences similar to the use of fossil fuels in the future.
To study the issue of the emission of clean energy, we must first understand and master the main substances and their hazards. Researchers from the United States have found that unburned ethanol is the main emission during the use of biofuels, which is not the same as ordinary ethanol. Because ethanol in biofuels carries unique chemical characteristics such as corn and sugar cane, this feature is related to the way that these plants produce nutrients through photosynthesis, so this ethanol is less stable and can easily be converted into the harmful substance acetaldehyde.
The researchers collected air samples in the atmosphere of areas with more frequent human activities (Miami) and infrequent areas (Empire National Park). Gas chromatography was used to separate and burn each of the separated components, and the mass spectrometer was used to analyze the ratios. For each carbon isotope obtained, it was found that 75% of the ethanol in the former is derived from the burning of biofuels, while the latter's ethanol in the air comes from plants in the park.
According to the researchers, according to estimates of global emissions, the amount of ethanol released by living plants is currently three times that of artificial sources. However, if the amount of ethanol used in our fuel continues to increase, the amount of ethanol emitted by motor vehicles will eventually exceed that of natural resources. Emissions have become another thorny issue for humanity. (Field discipline)
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