The Main Uses of CO2 (2）

The main uses of CO2 (2）

Carbon dioxide is an oxide of carbon, with the chemical formula CO2. It is a colorless, odorless or colorless gas, and aqueous solutions have a slight sour taste at room temperature and pressure. It is very common. High purity carbon dioxide is mainly used in the electronics industry and as a regulator for polyethylene polymerization.

Used as a refrigerated preservative for fruits, vegetables, and meat. During the storage and transportation process, carbon dioxide is used to protect fruits, vegetables, and meat, isolate the air, especially the oxygen in the air, reduce the oxidation and respiratory consumption of fruits, vegetables, and meat, and achieve freshness preservation; It can also prevent the survival needs of organisms that damage fruits, vegetables, and meat with oxygen. By directly distributing dry ice, the use process is simple, reliable, safe, and cost-effective. Good cooling effect, long service life, and obvious advantages.

Plants absorb carbon dioxide to produce fuel. At present, some plants can extract bio oil, while terrestrial plants, aquatic plants, and algae absorb carbon dioxide through photosynthesis, and finally export petroleum and bio oil to achieve carbon dioxide regeneration process as fuel.

Used as a beverage additive. People often drink carbonated drinks in an attempt to dissolve more carbon dioxide, improve taste, increase the amount of carbon dioxide absorbed and excreted by the human body, and take away more calories; The food industry consumes a lot;

Used for extinguishing fires. Carbon dioxide has been widely used for firefighting. He is a very excellent firefighter. It has advantages such as self pressure, environmental protection, cooling, air insulation, and no residue. In addition to a small amount of special metal fire, it can also be used very flexibly. The only drawback is that it has a higher cost compared to water.

Artificial rainfall. In addition to condensation in clouds, dry ice is also used as an artificial precipitant for forming condensation nodules. At the same time, it also helps to cool, causing the water vapor in the clouds to form condensation nodules. This kind of rain and snow will not pollute the environment. Dry ice itself easily forms particles and powders. It is also very easy to use and affordable.

Used as a plant gas fertilizer. The three elements of photosynthesis in green plants are carbon dioxide, water, and sunlight. But the concentration of carbon dioxide in the air is very low, and the efficiency of plant photosynthesis is significantly reduced, especially in areas with more green plants. Therefore, in recent years, it has been found that increasing the concentration of carbon dioxide in the air can greatly enhance the photosynthesis of plants, thereby greatly accelerating their growth and doubling their ability to absorb carbon dioxide.

A way of using work energy. This is a new method of utilizing carbon dioxide, which uses low-temperature dry ice to absorb heat from materials such as air and water at room temperature, vaporize it, and expand it into high-pressure carbon dioxide gas that is beneficial for aviation machinery power generation. This changes the traditional way of converting carbon dioxide into other combustible chemicals and allows for the reuse of heat and electricity.

Used as a refrigerant for heat pumps, replacing Freon. The boiling point and critical temperature of carbon dioxide determine that it can become a good refrigerant for heat pump air conditioners, refrigerators, and water heaters, replacing most existing refrigerants. In the past, compressor technology was not mature, and it was not easy to improve the high pressure difference and maintain stable and efficient operation. However, now industrial production technology is very mature, which will further promote the application of its refrigerants.

Used as a working fluid for energy storage and power generation. This is another important new use, which uses waste liquid to provide power for the compressor, compresses carbon dioxide gas to release a large amount of heat, becomes a "boiler" heat source, and stores carbon dioxide in low-temperature dry ice at -78.5 degrees Celsius. When electricity is needed, dry ice can absorb the heat of the surrounding medium, evaporate and expand, and generate electricity freely. The energy storage and power generation process is environmentally friendly and efficient. It can dissipate heat, cold, and electricity simultaneously. It is the most promising form of energy storage and release.