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trans-1,3,3,3-Tetrafluoropropene (HFO-1234ze(E), R-1234ze(E)) is a hydrofluoroolefin.It was developed as a "fourth generation" refrigerant to replace fluids such as R-134a, as a blowing agent for foam and aerosol applications, and in air horns and gas dusters. [3]
R-1234yf is also a component of zeotropic refrigerant blend R-454B. HFO-1234yf has a GWP less than carbon dioxide, [4] [2] itself 1,430 times less potent than R-134a. [5] For this reason, 2,3,3,3‑tetrafluoropropene is the pre-eminent replacement for R-134a in vehicular air conditioners. As of 2022, 90% of new U.S. vehicles are estimated to ...
Net global warming potential, GWP, over a 100-year time horizon (normalized to be 1 for R-744, carbon dioxide) Occupational exposure limit / permissible exposure limit in parts per million (volume per volume) over a time-weighted average (TWA) concentration for a normal eight-hour work day and a 40-hour work week
The refrigerant was developed by the DuPont/Honeywell company and is more expensive per pound than R-134a. R-1234yf can be found in late-model cars and is not cross-compatible with older R-134a or R-12 systems. Of the three refrigerants, R-1234yf is the best for the environment with the lowest global warming potential number which is about a three.
With increasing regulations, refrigerants with a very low global warming potential are expected to play a dominant role in the 21st century, [59] in particular, R-290 and R-1234yf. Starting from almost no market share in 2018, [ 60 ] low GWPO devices are gaining market share in 2022.
2,3,3,3-tetrafluoropropene (HFO-1234yf, trademarked as Opteon YF) and 1,3,3,3-tetrafluoropropene (HFO-1234ze). [7]
At one point, known as BJ Services Company, the company operated in more than 50 countries worldwide. BJ Services generated record revenue of $5.4 billion in fiscal 2008, up 13% from the prior year, and had 18,000 employees. [1] On April 28, 2010, the company was bought by Baker Hughes in a $5.5 billion stock and cash deal.
Barbara Haviland Minor is an American chemical engineer, known for the development of refrigerants.She was technical leader for chemical company DuPont in the development of R-1234yf, [1] a refrigerant which, as of 2018, was used in 50% of all new vehicles produced by original equipment manufacturers, [2] and which represented an important contribution to countering global warming.