• Properties and Uses of Carbon Dioxide
    The properties of carbon dioxide are divided into physical properties and chemical properties.
    1. The physical properties of carbon dioxide
    Carbon dioxide is a colorless and odorless gas at room temperature and pressure, and is soluble in water and most organic solvents such as hydrocarbons.
    2. Chemical properties of carbon dioxide
    Carbon dioxide is one of the carbon-oxygen compounds, an inorganic substance, non-combustible, usually does not support combustion, and non-toxic at low concentrations. It is also the anhydride of carbonic acid, belongs to the acidic oxide, has the generality of acidic oxide, in which the chemical valence of carbon element is +4, in the highest valence state of carbon element, so carbon dioxide has oxidation and no reduction, but oxidation is not strong.
    Main uses.
    1. High purity carbon dioxide is mainly used in electronics industry, medical research and clinical diagnosis, carbon dioxide laser, calibration gas for testing instruments and preparation of other special mixed gases, and as a regulator in polyethylene polymerization reaction.
    2. Solid carbon dioxide is widely used for refrigeration of dairy products, meat, frozen foods and other perishable foods in transit, and as a freezing agent in many industrial processes, such as crushing heat-sensitive materials, rubber polishing, metal cold treatment, shrinkage assembly of mechanical parts, vacuum cold traps, etc.
    3. Gaseous carbon dioxide is used in carbonized soft drinks, pH control in water treatment process, chemical processing, food preservation, inert protection in chemical and food processing, welding gas, plant growth stimulant, used in casting for hardening moulds and cores and for pneumatic devices, also used as diluent for germicidal gas (i.e. using mixed table gas of ethylene oxide and carbon dioxide as germicidal, insecticide, fumigant, widely used in (medical equipment, packaging materials, clothing, fur, bedding, etc. sterilization, bone powder disinfection, warehouses, factories, cultural relics and books fumigation).
    4. Liquid carbon dioxide is used as a refrigerant, low temperature test for aircraft, missiles and electronic components, to improve the recovery rate of oil wells, to polish rubber and to control chemical reactions, and also as a fire extinguishing agent. 
    Hazards of carbon dioxide to the natural environment.
    Natural greenhouse effect: greenhouse gases such as carbon dioxide in the atmosphere can radiate longer wavelength long-wave radiation to the ground after strongly absorbing it, which plays an insulating effect on the ground.
    Enhanced greenhouse effect: Since the industrial revolution, the concentration of greenhouse gases in the atmosphere has increased dramatically due to the emission of large amounts of CO2 and other greenhouse gases from human activities, resulting in an increasingly enhanced greenhouse effect. The concentration of CO2 in daily life is measured by choosing a CO2 sensor.
    https://www.renkeer.com/co2-sensors-types-and-choose/
    According to statistics, the global average annual atmospheric CO2 concentration before industrialization was 278 ppm (1 ppm is one part per million), while 2012 was the global average annual atmospheric CO2 concentration of 393.1 ppm, and by April 2014, the monthly average CO2 concentration in the atmosphere of the Northern Hemisphere exceeded 400 ppm for the first time.
    Global warming: the increasing atmospheric greenhouse effect is causing global warming, producing a series of global climate problems that are now scientifically unpredictable. The International Economics of Climate Change report shows that if humans maintain their current lifestyles, there is a 50% chance that the global average temperature will rise by 4°C by 2100.
    If the global temperature rises by 4°C, the glaciers at the Earth's North and South Poles will melt, sea levels will rise, more than 40 island nations and the world's most populous coastal cities will face the danger of inundation, and the lives of tens of millions of people around the world will face a crisis, even resulting in a global ecological balance disruption, which will eventually lead to large-scale global migration and conflict.
    Properties and Uses of Carbon Dioxide The properties of carbon dioxide are divided into physical properties and chemical properties. 1. The physical properties of carbon dioxide Carbon dioxide is a colorless and odorless gas at room temperature and pressure, and is soluble in water and most organic solvents such as hydrocarbons. 2. Chemical properties of carbon dioxide Carbon dioxide is one of the carbon-oxygen compounds, an inorganic substance, non-combustible, usually does not support combustion, and non-toxic at low concentrations. It is also the anhydride of carbonic acid, belongs to the acidic oxide, has the generality of acidic oxide, in which the chemical valence of carbon element is +4, in the highest valence state of carbon element, so carbon dioxide has oxidation and no reduction, but oxidation is not strong. Main uses. 1. High purity carbon dioxide is mainly used in electronics industry, medical research and clinical diagnosis, carbon dioxide laser, calibration gas for testing instruments and preparation of other special mixed gases, and as a regulator in polyethylene polymerization reaction. 2. Solid carbon dioxide is widely used for refrigeration of dairy products, meat, frozen foods and other perishable foods in transit, and as a freezing agent in many industrial processes, such as crushing heat-sensitive materials, rubber polishing, metal cold treatment, shrinkage assembly of mechanical parts, vacuum cold traps, etc. 3. Gaseous carbon dioxide is used in carbonized soft drinks, pH control in water treatment process, chemical processing, food preservation, inert protection in chemical and food processing, welding gas, plant growth stimulant, used in casting for hardening moulds and cores and for pneumatic devices, also used as diluent for germicidal gas (i.e. using mixed table gas of ethylene oxide and carbon dioxide as germicidal, insecticide, fumigant, widely used in (medical equipment, packaging materials, clothing, fur, bedding, etc. sterilization, bone powder disinfection, warehouses, factories, cultural relics and books fumigation). 4. Liquid carbon dioxide is used as a refrigerant, low temperature test for aircraft, missiles and electronic components, to improve the recovery rate of oil wells, to polish rubber and to control chemical reactions, and also as a fire extinguishing agent.  Hazards of carbon dioxide to the natural environment. Natural greenhouse effect: greenhouse gases such as carbon dioxide in the atmosphere can radiate longer wavelength long-wave radiation to the ground after strongly absorbing it, which plays an insulating effect on the ground. Enhanced greenhouse effect: Since the industrial revolution, the concentration of greenhouse gases in the atmosphere has increased dramatically due to the emission of large amounts of CO2 and other greenhouse gases from human activities, resulting in an increasingly enhanced greenhouse effect. The concentration of CO2 in daily life is measured by choosing a CO2 sensor. https://www.renkeer.com/co2-sensors-types-and-choose/ According to statistics, the global average annual atmospheric CO2 concentration before industrialization was 278 ppm (1 ppm is one part per million), while 2012 was the global average annual atmospheric CO2 concentration of 393.1 ppm, and by April 2014, the monthly average CO2 concentration in the atmosphere of the Northern Hemisphere exceeded 400 ppm for the first time. Global warming: the increasing atmospheric greenhouse effect is causing global warming, producing a series of global climate problems that are now scientifically unpredictable. The International Economics of Climate Change report shows that if humans maintain their current lifestyles, there is a 50% chance that the global average temperature will rise by 4°C by 2100. If the global temperature rises by 4°C, the glaciers at the Earth's North and South Poles will melt, sea levels will rise, more than 40 island nations and the world's most populous coastal cities will face the danger of inundation, and the lives of tens of millions of people around the world will face a crisis, even resulting in a global ecological balance disruption, which will eventually lead to large-scale global migration and conflict.
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