The electrical industry continues to be the largest user of SF 6 because of its superior properties as a gaseous dielectric insulating medium to prevent high voltage electrical breakdown and electrical explosion hazards.
Advantages resulting from its high dielectric strength, compared to air, nitrogen, oil and fluorinated ketones, include size reduction of electrical equipment, superior arc-quenching protection in circuit breakers, self-healing of arcing products, large current interruption, noise-free operation, minimal moisture problems, lower fire risk, absence of carbon deposition, and low maintenance cost.
A few words of caution are in order about health and safety issues concerning a molecule that results from the effect of electrical arcs, discharges, and sparks on SF 6.
It has been identified as disulfur decafluoride, S 2 F 10 , a gaseous molecule with a sulfur-sulfur bond and each sulfur atom octahedrally surrounded by five fluorine atoms. It likely forms via an electrically induced decomposition reaction of SF 6 :. S 2 F 10 has a toxicity four times that of phosgene, COCl 2! Its toxicity emanates from the disproportionation reaction:. The SF 6 is inert but the SF 4 hydrolyses in the lungs to lethal sulfurous and hydrofluoric acid.
As a result, there has been an increase in the number of connections to the electricity grid compared with the traditional fossil power stations, with the consequential rise in the use of switchgear to deal with arcing and to stop short circuits.
Unfortunately, this growing usage of SF 6 continues unabated due to the technological and economical challenges of switching to more environmentally benign alternatives.
In an effort to ameliorate the rise of these emissions into the atmosphere, regulations are being imposed on producers and users that include recycling and minimizing of SF 6 emissions during various operation, maintenance and refill processes.
Furthermore, companies are being required to monitor and report the cradle-to-grave SF 6 emissions from their operations, beginning with production and including transportation, distribution, commissioning, service inspection, maintenance, and end-of-life collection. While thermochemical, electrochemical, and photocatalytic means of converting CO 2 into value-added chemicals, pharmaceuticals, polymers, and fuels are under active development, similar attention to SF 6 appears to be minuscule or completely lacking.
There is a place where you'll get the Perfect SF6 solution for all your needs. We have employees, factory covering as. Enviro-Equipment custom builds remediation systems to your specifications. Check out our inventory of new, used and rental remediation equipment for soil. Tried and tested a million times: Worldwide, the Dr ger Short-term Tubes have proven to be a very cost-effective and reliable method for the measurement of gases.
Decreasing occupational exposure values, special customer requirements and new legal regulations made it necessary to develop even more sensitive Dr ger-Tubes. When the breaker operates, the moving contact is pulled apart and an arc is struck between the contacts.
Let our company Direct take it off your hands! Whether you need airbrake tubing, medical tubing or a particular material, such as PVDF or metric metal tubing, Parker makes it. Parker delivers one of the largest. Primary gas insulated switchgear Flexible. Source from Shang Nitrogen. This part of IEC deals with the safety of sealed hermetic and semi-hermetic type motor-compressors,. SF6 Gas — 58L.
Unless already owned, a small lightweight regulator is needed to control gas flow from bottle. Buy a C regulator for this bottle from us here. Can chemists and engineers rise to the challenge of solving the looming SF6 problem?
Categories Research. Tags Green chemistry. Request new password.
0コメント