Product Design, Manufacturing & Innovation Resources
집 » Critical Temperature of Gases

Critical Temperature of Gases

1869
  • Thomas Andrews
19th-century laboratory scene illustrating the critical temperature of gases in thermodynamics.

(설명을 위한 생성된 이미지입니다)

임계 온도란 적용된 압력과 관계없이 명확한 액체상이 형성될 수 없는 온도입니다. 압력. Each gas has a unique critical temperature. To liquefy a gas, it must first be cooled below this temperature. This concept, established by Thomas Andrews, is fundamental to understanding the conditions required for any liquefaction 프로세스.

Thomas Andrews’ experiments in the 1860s on carbon dioxide were pivotal. He meticulously measured its pressure-volume-temperature (P-V-T) relationships and discovered that above approximately 30.98 °C (304.1 K), CO2 could not be liquefied no matter how much pressure was applied. He termed this the ‘critical temperature.’ Below this temperature, increasing the pressure on the gas would eventually cause it to condense into a liquid. At the critical temperature itself, the gas transitions into a liquid at a specific ‘critical pressure’ and ‘critical volume,’ a state known as the critical point. At this point, the densities of the liquid and gas phases become equal, and the meniscus separating them disappears. The substance becomes a supercritical fluid, possessing properties of both a gas and a liquid. This discovery was crucial because it explained why earlier attempts by scientists like Faraday to liquefy gases such as oxygen, nitrogen, and hydrogen had failed; they were not cooling the gases below their respective, much lower, critical temperatures, a prerequisite for liquefaction by compression.

UNESCO Nomenclature: 2212
열역학

유형

물리적 원리

분열

기초적인

용법

널리 사용됨

전구체

  • 보일의 법칙(압력과 부피 사이의 관계)
  • 샤를의 법칙(부피와 ​​온도의 관계)
  • 고압 조건에서 기체 압축률에 대한 아마가트의 실험
  • Michael Faraday’s earlier, partially successful attempts at gas liquefaction

응용 프로그램

  • 천연가스 액화(LNG)
  • 산업 및 의료용 액체 산소 및 질소 생산
  • 냉동 및 공조 시스템
  • 초임계 유체 추출(예: 커피의 카페인 제거)
  • 초임계 유체 크로마토그래피

특허:

NA

잠재적 혁신 아이디어

  • miniaturized supercritical fluid reactors for nanoparticle synthesis
  • advanced 극저온 propellant management for long-duration space missions
  • supercritical fluid-based systems for recycling complex plastics
  • high-pressure food preservation using supercritical CO2
  • geothermal energy extraction using supercritical fluids as a working medium
  • development of novel solvents for green chemistry applications
  • cryopreservation techniques using controlled phase transitions
  • supercritical fluid chromatography for pharmaceutical purification
  • enhanced oil recovery techniques using supercritical CO2 injection
  • compact cooling systems for high-performance electronics based on phase change
관련 용어: 임계 온도, 상전이, 액화, 토마스 앤드류스, 임계점, 기체, 액체, 압력, 열역학, 초임계 유체.

역사적 맥락

Critical Temperature of Gases

1860
1861
1865
1869
1871
1876
1877
1859
1861
1865
1868
1870
1873
1877
1880

(날짜를 알 수 없거나 관련이 없는 경우, 예를 들어 "유체역학"의 경우, 주목할 만한 등장 시기를 대략적으로 추정하여 제공합니다.)

10년차 기념일

고화질 이미지 및 다운로드는 등록된 회원에게만 100% 무료로 제공됩니다.

> 로그인 <