Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Sulphur Mineral,Sulfur,Physical Characteristics of Sulfur,Sulphur Exporters The Romans used sulphur or fumes from its combustion as an insecticide and to purify a sick room and cleanse its air of evil (Cunningham 1935). Sulphur is found in meteorites, volcanoes, hot springs, and as galena, gypsum, Epsom salts, and barite. Although sulphur is in the same group in the periodic table as oxygen, there are more differences in the chemical characteristics of these elements than there are similarities. www.mineralszone.com /minerals/sulphur.html   (616 words)

Inorganic Fluorides - PSL1 Gaseous inorganic fluoride compounds (e.g., hydrogen fluoride and sulphur hexafluoride) are primarily released into the atmosphere whereas particulate compounds (e.g., sodium fluoride and calcium fluoride) are released into aquatic and terrestrial environments. Inorganic fluoride compounds (except sulphur hexafluoride) are not expected to remain in the troposphere very long or migrate to the stratosphere. Even though sulphur hexafluoride is long-lived enough to migrate into the stratosphere, its contribution to stratospheric ozone depletion is considered minimal, because fluorine is much less efficient and less available than chlorine in the catalytic destruction of ozone in the stratosphere (Chu, 1991). www.hc-sc.gc.ca /ewh-semt/pubs/contaminants/psl1-lsp1/fluorides_inorg_fluorures/fluorides_inorg_fluorures_3_e.html   (3791 words)

Spluch: Sulphur Hexafluoride gas makes toy ship floats magically   (Site not responding. Last check: 2007-10-13) It is actually caused by the presense of a gas called sulphur hexafluoride which is significantly denser than air. It's density: since sulphur hexafluoride is denser than air, the vocal chords can't vibrate at such a high frequency, which makes voice deeper. Actually, the only effect on sound is that it propagates _faster_ in sulphur hexafluoride than in normal air, and faster in normal air than in helium (the denser the medium, the faster sound propagates). spluch.blogspot.com /2007/01/sulphur-hexafluoride-gas-make-toy-ship.html   (362 words)

Genspect - Sulfur Hexafluoride, SF6 Sulfur Hexafluoride (SF Sulfur hexafluoride is a colorless, odorless, inflammable gas with a molecular structure consisting of one sulfur atom and six fluorine atoms. Sulfur hexafluoride is commonly used as an insulating gas in electrical equipment, including high-voltage circuit breakers, transformers, and switchgears. The atmospheric lifetime of sulfur hexafluoride is estimated to be 3,200 years. www.genspect.com /public/pages/gases/sulfur_hexafluoride.htm   (264 words)

Foot fault - 29 March 1997 - New Scientist   (Site not responding. Last check: 2007-10-13) Millions of tiny bags of sulphur hexafluoride are inserted into the soles of running shoes to cushion feet as they pound the tarmac. Because molecules of sulphur hexafluoride are relatively large, the gas is unlikely to leak from the bags, but it will escape into the atmosphere when shoes rot or are punctured. Scientists say that, as a greenhouse gas, sulphur hexafluoride is 35 000 times as potent as carbon dioxide. www.newscientist.com /article/mg15320751.900-foot-fault.html   (199 words)

Health hazards that lurk in 'inert' gas - 16 February 1991 - New Scientist   (Site not responding. Last check: 2007-10-13) Sulphur hexafluoride itself is harmless except in confined space, where it displaces oxygen and can asphyxiate people. If sulphur hexafluoride is subjected to electrical sparking in the presence of oxygen, it degrades, releasing toxic breakdown products. These include sulphur oxyfluorides, sulphur dioxide, and sulphur tetrafluoride, which react with water in the body's mucous membranes to form other acidic compounds that can damage the lungs. www.newscientist.com /article/mg12917562.100-health-hazards-that-lurk-in-inert-gas-.html   (269 words)

IB Chemistry higher level notes: Hybridisation Sulphur hexafluoride forms six attacments to the six fluorines and consequently needs six available orbitals. The only useful advice here is that when oxygen is attached to the central atom it can accept lone pairs from the central atom to make up its own octet (set of eight outer electrons) and that you should look out for this. This picture suggests that the bonding between the sulphur and each of the oxygens is different. ibchem.com /IB/ibnotes/full/bon_htm/14.2.htm   (2040 words)

Gas slashes greenhouse emissions from magnesium production (Solution) But the magnesium manufacturing process using sulphur hexafluoride had the potential to produce more greenhouse gases than what could be saved by using the lighter metal. Of the 7 000 million tonnes of CO emissions produced in the USA in the year 2000, four million tonnes came from sulphur hexafluoride used in the magnesium industry. About two per cent of magnesium is lost during melting when sulphur hexafluoride is used as a cover gas. www.csiro.au /csiro/content/standard/ps1fw.html   (630 words)

Living In One World Halocarbons, perfluorcarbons and sulphur hexafluoride are the main remaining greenhouse gases — all emitted as a result of human activity. Sulphur hexafluoride, emitted mainly from aluminium smelting, may also break down into a gas with an even higher radiative forcing effect — trifluoromethyl sulphur pentafluoride (SF5CF3) — emitted since the late 1950s and still increasing at an annual rate of 6% per annum. In addition to tropospheric ozone, warming is also caused by certain aerosols, fl carbon from the burning of biomass and fossil fuels, mineral dust from agricultural and mining activities and cirrus cloud formation from the vapour trails of aircraft. www.worldenergy.org /wec-geis/publications/reports/liow/stresses/global.asp   (2475 words)

BC Hydro - Info - EN30(1) Sulphur Hexafluoride Gas Inventory and Emission Rate EN30(1) Sulphur Hexafluoride Gas Inventory and Emission Rate Sulphur Hexafluoride (SF) is used to cool and insulate electrical equipment to prevent arcing and outages. It is also a powerful greenhouse gas, with a global warming potential 23,900 times that of carbon dioxide. www.bchydro.com /info/reports/reports45857.html   (113 words)

Brussels urges EU to tackle fluorinated gas emissions The Commission proposed for EU member states to reduce their emissions of hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride by 23 million tonnes of carbon dioxide (CO2) equivalent by 2010. But their potential to warm the atmosphere is high and many of them have long lifetimes, the Commission warned. Sulphur hexafluoride has a global warming potential 23,900 times that of CO2, which is the most common greenhouse gas, it said. www.spacedaily.com /2003/030812122956.nxlrwg7q.html   (439 words)

Air Products Canada Ltd.   (Site not responding. Last check: 2007-10-13) Technologies include: removing contaminants with gases such as oxygen, hydrogen, chlorine and sulphur hexafluoride (SF using nitrogen or argon as inert carrier gases; stirring using gases; oxygen-rich roasting atmospheres; and other industrial gases applications. Oxygen is used via an oxidation process to remove sulphur and other contaminants such as antimony and bismuth from copper, lead, nickel or zinc. Injection of sulphur hexafluoride (SF or chlorine, in an inert gas (nitrogen or argon), into molten aluminium or copper removes hydrogen and other undesirable elements that cause porosity, inclusions or pinholes in the final product. www.airproducts.com /CANADA/metals/nonferrous_roasting.htm   (301 words)

Air traffic control Clarke's group calculated that sulphur hexafluoride molecules should float freely down the large channels of boggsite because they 'feel' the corrugations less than do the smaller xenon atoms, which rattle in the constrictions. Thus the researchers predicted that the sulphur hexafluoride should become confined largely to the wide pores of boggsite, while the xenon should stay mostly in the narrow pores. Sure enough, xenon tended to escape from the holey material along one direction -- from the top and bottom, say -- while the sulphur hexafluoride came out in the perpendicular direction, from the sides. www.mindswap.org /2002/nature/000406-1.xml   (588 words)

YouTube - Sulphur Hexafluoride is 6 times heavier than air YouTube - Sulphur Hexafluoride is 6 times heavier than air Sulphur Hexafluoride is 6 times heavier than air helium sulphur hexafluoride hexaflouride voice slow deep video (more) (less) www.youtube.com /watch?v=a9ifZlu6YKk&eurl=   (212 words)

WHOI Funding and Awards - Mellon 1999 Abstracts Sulphur hexafluoride and Helium-3 have proven to be powerful tracers for the study of ocean processes, such as gas exchange and dispersion. Fluorescent dyes, such as rhodamine and fluorescein are nonvolatile, but their disadvantage is that they are a million times less detectable then sulphur hexafluoride, and so experiments are limited to a few days. We propose to study the stability and detectability in seawater of a class of compounds used in recent years for sensitive tracing in biological systems in the laboratory, with an eye to developing them as nonvolatile ocean tracers. www.whoi.edu /dirres/funding/whoi_funding/Indep_Inter/ind_award_1999.html   (2936 words)

Global Warming, Greenhouse Gases and Carbon Sinks Although this appears to be a separate (and serious) issue, there is a connection because the ozone depleting gases also contribute to global warming. Sulphur Dioxide; SO2 is well known for its damaging potential to humans and trees especially. By comparison the GWP for Methane is 21, Nitrous Oxide 310, most of the FCs are up in the 1000s with Sulphur hexafluoride at the top with a GWP of 23,900. www.envocare.co.uk /global_warming.htm   (839 words)

Sulphur Hexafluoride SF6 (C) Solvay's sulphur hexafluoride is a non-toxic, inert, insulating and cooling gas of high dielectric strength and thermal stability. It is particularly suitable for application in both high-voltage and medium-high voltage power circuit breakers as well as in high-voltage cables, transformers, transducers, particle accelerators, X-ray equipment and UHF transmission systems and as an etching and chamber cleaning gas in the semiconductor industry. Even in the very lowest concentrations, sulphur hexafluoride can be detected by halogen leak detectors. www.solvay-fluor.com /chemicals/Sulphur_Hexafluoride_SF6_C   (211 words)

fluorine Uranium hexafluoride (UF6) is used to separate isotopes of uranium. Fluorine reacts violently with water forming hydrogen fluoride, and liberates oxygen which is highly charged with ozone. Fluorine is used in the manufacture of uranium hexafluoride which is required for the separation of the isotopes of uranium in centrifuges. www.fluoroseal.com /fluorine.html   (1173 words)

Chemistry : Periodic Table : sulphur : chemical reaction data Sulphur does not react with water under normal conditions. Sulphur racts with all the halogens upon heating. Sulphur reacts with hot aqueous potassium hydroxide, KOH, to form sulphide and thiosulphate species. www.webelements.com /webelements/elements/text/S/chem.html   (163 words)

Alexander's Gas & Oil Connections - New York Power Authority signs agreement to reduce emissions "To help fight the threat of global warming, the Power Authority, with the support and encouragement of Governor George Pataki, is joining other utilities in the EPA's voluntary partnership aimed at reducing emissions of a particularly potent greenhouse gas, sulphur hexafluoride," said Eugene W. Zeltmann, NYPA president and COO. Sulphur hexafluoride, or SF6, is used as insulation in electrical transmission and distribution equipment, such as circuit breakers and switching gear, often in place of insulating oil. "The New York Power Authority's decision to work with the EPA to endeavour to reduce emissions of sulphur hexafluoride demonstrates a true commitment to protecting the environment," said Eric Dolin, the EPA's program manager for the SF6 Emissions Reduction Partnership for Electric Power Systems. www.gasandoil.com /GOC/news/ntn02188.htm   (654 words)

Products by Industry Haskel has developed a range of specialised mobile gas handling systems capable of handling sulphur hexafluoride (commonly known as SF6 gas) in either a liquid or gaseous state. In conjunction with the National Grid Company PLC, formerly the Central Electricity Generating Board, in the United Kingdom, our engineers have designed these systems to meet the varied and growing needs of the world's power generation companies. Sulphur hexafluoride is commonly known as SF6 gas. www.haskel.com.sg /02_products/energy.htm   (786 words)

Sulfur Hexafluoride : SF6 : Chemically Pure - Electronic and Supercritical Fluid - Properties, Purity and Packaging - ... Sulfur Hexafluoride : SF6 : Chemically Pure - Electronic and Supercritical Fluid - Properties, Purity and Packaging - Sulfur hexafluoride is used as a gaseous insulator in power breakers. : Sulfur hexafluoride is used as a gaseous insulator in power breakers. Used as a trace gas and an oxygen asyphxiant in aluminum foundry application in reduction of porosity, replacing corrosive and toxic chlorine processes. www.c-f-c.com /specgas_products/sulfurhex_sf6.htm   (200 words)

Sulphur Hexaflouride and the Electricity Supply Industry If you are unable to access these documents, please contact the Australian Greenhouse Office to organise a suitable alternative format. The Australian Government has committed to reducing and reporting on its cumulative greenhouse gas emissions, including sulphur hexafluoride (SF6). This discussion paper includes a proposal for the extension and strengthening of voluntary commitments between Government and the electricity supply industry to ensure reporting of sulphur hexafluoride (SF6) emissions and maximisation of abatement. www.greenhouse.gov.au /challenge/publications/sulphurhexafluoride.html   (186 words)

BP LPG UK - Benefits of Autogas   (Site not responding. Last check: 2007-10-13) The sulphur content of autogas is less than Ultra Low Sulphur Petrol or Ultra Low Sulphur Diesel. The only sulphur contained in autogas is that added as part of the stenching agent which is generally less than 25ppm. The Government's Climate Change Programme targets a bundle of greenhouse gases which includes Carbon Dioxide (CO2), methane, nitrous oxide, hydrofluorocarbons, prefluorocarbons and sulphur hexafluoride as stated in the Kyoto agreement. www.bp.com /genericarticle.do?categoryId=3000037&contentId=7002722   (1203 words)

Applications: Innova Air Tech Instruments A/S - gas analyser, green house gas emissions, anaesthetic gas monitoring, ...   (Site not responding. Last check: 2007-10-13) The amount of Sulphur Hexafluoride (SF6) used in the Power Utility Industry has been increasing. The gas is used mainly as an insulator for electrical switch-gear and control-gear. The Photoacoustic Multi-gas Monitor 1312 is excellent for monitoring leaking Sulphur Hexafluoride from high-voltage equipment due to a low detection limit and high linearity. www.innova-airtech.com /Applications.gas_monitoring9.0.html   (827 words)

Fluoride: Protected Pollutant or Panacea? Approximately 23%, 58%, and 19% of the total inorganic fluorides reported to enter the Canadian environment from anthropogenic sources are released to the air, water, and land, respectively. Gaseous inorganic fluorides (e.g., hydrogen fluoride and sulphur hexafluoride) are primarily released into the atmosphere, whereas particulate compounds (e.g,, sodium fluoride and calcium fluoride) are released into the aquatic and terrestrial environments. Although sulphur hexafluoride is long-lived enough to migrate into the stratosphere, its contribution to the depletion of stratospheric ozone is considered minimal, Owing to the lack of relevant data, it is not possible to determine the contribution of inorganic fluorides to global climate change. www.fluoridation.com /enviro.htm   (4053 words)

Clinical Trial: A Pilot Study Evaluation of the Efficacy of SonoVue to Detect and Characterise Breast Lesions The investigators' objective is to characterise the properties of an intravascular ultrasonographic contrast agent SonoVue (sulphur hexafluoride microbubbles) to improve the diagnostic value of the ultrasound examination in patients with different breast lesions. The final purpose of this ultrasonography is to allow the early detection of tumors and to improve the differentiation between benign and malignant lesions. SonoVue® (sulphur hexafluoride microbubbles) is a microbubbles preparation that is stable, resistant to pressure, and specifically designed to be used as a contrast agent for ultrasound imaging. clinicaltrials.gov /ct/show/NCT00243698   (612 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.