CO2 production pathway

1. All animals breathe in oxygen and exhale carbon dioxide.

2. Organic matter (including animals and plants) can release carbon dioxide in the process of decomposition, fermentation, decay and deterioration.

3. All manure and humic acid can also release carbon dioxide during fermentation and maturation.

4. During the combustion of petroleum, paraffin, coal, and natural gas, carbon dioxide is also released.

5. Petroleum and coal also release carbon dioxide during the production of chemical products.

Main application of carbon dioxide

1. High-purity carbon dioxide is mainly used in the electronics industry, medical research and clinical diagnosis, calibration of carbon dioxide lasers, testing instruments and the preparation of other special gas mixtures, and as a regulator in polyethylene polymerization.

2. Liquid carbon dioxide is used as a refrigerant, low-temperature tests of aircraft, missiles and electronic components, to improve oil well recovery, rubber polishing and chemical reaction control, and can also be used as a fire extinguishing agent.

3. Solid carbon dioxide is widely used in refrigerating dairy products, meat, frozen food and other foods that are perishable during transportation. It is used as a refrigerant in many industrial processes, such as crushing heat-sensitive materials, rubber polishing, metal cold processing, and mechanical parts. Shrink assembly, vacuum cold trap, etc.

4. Gaseous carbon dioxide is used for carbonized soft drinks, pH control in water treatment processes, chemical processing, food preservation, inert protection in chemistry and food processing, welding gas, plant growth stimulants, and used in hardening molds and cores in casting. Used in pneumatic devices, and also used as a diluent for sterilizing gas (that is, using a mixture of ethylene oxide and carbon dioxide as a sterilization, insecticide, and fumigant. It is widely used in medical appliances, packaging materials, clothing, fur, bedding, etc. Sterilization, bone meal disinfection, fumigation of warehouses, factories, cultural relics, books).

5. Supercritical carbon dioxide can be used as a solvent to dissolve non-polar, non-ionic and low molecular weight compounds, so it has a wide range of applications in homogeneous reactions