The flat screen, at the price of greenhouse effect
By Denis Delbecq • July 3rd, 2008 in 10:07 · Category: Actuality
In the inventory of gases with greenhouse effect, the one at least was forgotten. And it is not without consequence since the trifluorure of nitrogen (NF3) sees its use climbing sharp with the frenzy of the consumers for the flat screens of television. Evaluée in four thousand tons a year, the production doubles every year.
The trifluorure of nitrogen is for some years very appraised by electronic industry. He indeed serves for cleaning the slabs of screens LCD after the chemical operations of store in gaseuse stage. Progressively, NF3 imposed itself to reduce the usage of perfluorocarbones, a gas with admitted greenhouse effect. According to the number of New Scientist to appear on Saturday, Air products, the main producer of trifluorure of nitrogen, constructed two new sites of production.
Today, according to jobs of Micahel Prather published in the Geophysical Research Letters, NF3's production represents already, in term of greenhouse effect, the equivalent of 67 million tons of carbon dioxide. A maximum value since nobody can say how much about this gas is liberated by the plants which use it. Air Products considers that rejections are weak. But since the impact of the gas on greenhouse effect is not researched in the note of the producer, it is probable that precautions are not taken to avoid that it is unloosed in nature.
The trifluorure of nitrogen shows a half-life of 550 years in the atmosphere (1). Especially, he shows a power warming up the upper 17 000 times in that some carbon dioxide and he is away of the Kyoto protocol because too little used at the time of its writing. According to New Scientist, its usage could be replaced with the pure fluorine, which already uses the Japanese giant Toshiba Matsushita Display for the manufacture of the flat screens.
(1) Lasted at the end of which the half of the substance disappeared.
Picture: © Denis Delbecq - on 2006
Article read 3,538 times. Tags:climat, greenhouse effect, climatic rechauffement, television
Comments in 
The Japanese Toshiba it would position him as constructor of ecological screen? lol roughly if one please be a citizen's éco one should rather be bought a screen LCD Toshiba than other one??
Having put to one side the difference of consequence to environment, the pure fluorine assures t him the same performances as NF3? Has t him there other side effects which would not be known to the Pure Fluorine?
Thank you and good day.
has to begin with the glass electrique has Arsenic, by way of the liquid crystaux or the layers of ITO, the ethylenes glycoles, NMP (N-methyl pyrrolidone), TMAH, Acetone, Oxide de Cesium or Crome.
finally, ca stay when meme d a better ecologique output that ecrans has cathode-ray tube.
to re-lay in the dilem of the videosearchlight, or ecran LCD, on the whole grey l energie would be the meme. n to forget not that a profecteur consome about 3 has 5 more electrique power that TELE LCD.
then has the end, c Paul is who is right, him vautmieux to buy a boucain ~~