 | This article provides insufficient context for those unfamiliar with the subject. (May 2019) |
Liquid carbon dioxide is the liquid state of carbon dioxide (CO
2), which cannot occur under atmospheric pressure. It can only exist at a pressure above 5.1 atm (5.2 bar; 75 psi), under 31.1 °C (88.0 °F) (temperature of critical point) and above −56.6 °C (−69.9 °F) (temperature of triple point).[1] Low-temperature carbon dioxide is commercially used in its solid form, commonly known as "dry ice". Solid CO
2 sublimes at 194.65 K (−78.5 °C; −109.3 °F) at Earth atmospheric pressure — that is, it transitions directly from solid to gas without an intermediate liquid stage. The uses and applications of liquid carbon dioxide include decaffeinating coffee,[2] extracting virgin olive oil from olive paste, in fire extinguishers, and as a coolant.
- ^ "How to Make Liquid CO2". Sciencing. Retrieved 2019-06-11.
- ^ Zabot, Giovani L. (January 2020). "Chapter 11 - Decaffeination using supercritical carbon dioxide". Green Sustainable Process for Chemical and Environmental Engineering and Science. Elsevier. pp. 255–278. doi:10.1016/B978-0-12-817388-6.00011-8. ISBN 9780128173886. S2CID 209725830. Retrieved 2022-01-01.
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