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  2. Dry ice - Wikipedia

    en.wikipedia.org/wiki/Dry_ice

    Subliming dry ice pellet, with white frost on the surface. Dry ice means the solid form of carbon dioxide.It is commonly used for temporary refrigeration as CO 2 does not have a liquid state at normal atmospheric pressure and sublimes directly from the solid state to the gas state.

  3. Carbon dioxide in Earth's atmosphere - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_in_Earth's...

    The concentration of carbon dioxide (CO 2) in the atmosphere reached 427 ppm (0.0427%) on a molar basis in 2024, representing 3341 gigatonnes of CO 2. [1] This is an increase of 50% since the start of the Industrial Revolution , up from 280 ppm during the 10,000 years prior to the mid-18th century.

  4. Carbon dioxide (data page) - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_(data_page)

    Structure and properties Index of refraction, n D: 1.000449 at 589.3 nm and 0 °C [1]: Dielectric constant, ε r: 1.60 ε 0 at 0 °C, 50 atm : Average energy per C=O bond : 804.4 kJ/mol at 298 K (25 °C) [2]

  5. Pumpable ice technology - Wikipedia

    en.wikipedia.org/wiki/Pumpable_ice_technology

    Frozen carbonated beverage quality depends on many factors, including the concentration, size and structure of the ice crystals. The concentration of the ice water mixture is determined accurately in accordance with the phase diagram of the solution and can reach 50%. The maximum crystal size is 0.5 mm to 1.0 mm.

  6. A Knoxville machine is turning pollution on its head ...

    www.aol.com/knoxville-machine-turning-pollution...

    In less than a year, Holocene went from lab experiments to a machine that can annually capture 10 tons of carbon dioxide. Timofte said the company needs to scale up operations by that much all ...

  7. Supercritical carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Supercritical_carbon_dioxide

    Supercritical carbon dioxide (s CO 2 ) is a fluid state of carbon dioxide where it is held at or above its critical temperature and critical pressure . Carbon dioxide usually behaves as a gas in air at standard temperature and pressure (STP), or as a solid called dry ice when cooled and/or pressurised sufficiently.

  8. Greenhouse gas monitoring - Wikipedia

    en.wikipedia.org/wiki/Greenhouse_gas_monitoring

    Carbon dioxide absorbs some of the radiation, allowing more radiation that passes through the reference cell to reach the detector than radiation passing through the sample cell. Data is collected on a strip chart recorder. The concentration of carbon dioxide in the sample is quantified by calibrating with a standard gas of known carbon dioxide ...

  9. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    The concentration of carbon dioxide (CO 2) in the atmosphere reached 427 ppm (0.0427%) on a molar basis in 2024, representing 3341 gigatonnes of CO 2. [78] This is an increase of 50% since the start of the Industrial Revolution, up from 280 ppm during the 10,000 years prior to the mid-18th century. [79] [80] [81] The increase is due to human ...

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