Methane molecule is the main component of natural gas. It is a clean energy gas. At the same time, it is an important greenhouse gas in the atmosphere. Its infrared absorption ability is about 26 times that of carbon dioxide, and its greenhouse effect is 22 times higher than that of carbon dioxide. , Accounting for 15% of the total contribution of greenhouse gases, of which the content in the air is about 2ppm.
Methane is produced by methanogenic bacteria or biological corruption in an oxygen-deficient environment. Swamps produce 150Tg per year (1T=1012) and consume 50Tg, rice fields produce 100Tg and consume 50Tg, and cattle and sheep and other livestock digestive systems produce 100- 150Tg, organisms will decay to produce 10-100Tg, and the total annual methane content in the atmosphere will increase by about 350Tg. Its average life span in the atmosphere is about 8 years, and it can pass the following chemical reactions:
CH4+OH→CH3+H2O