GE SEPCOIII to build Pakistanfirst ultra-supercritical

Jul 04, 2018 · PAKISTAN, Karachi, July 4th, 2018: GE Power (NYSE: GE) today announced that it will provide advanced boiler and steam turbine technology to power Pakistan’s first ultra-supercritical power plant in Deh Ghangiaro, Bin Qasim, Karachi. The project will add up to 660 megawatts (MW) of electricity to the national grid - the equivalent power neededGet price

Precision plasma etching of Si, Ge, and Ge:P by sf 6 with added O2

Mar 31, 2014 · Sidewall angles range from a minimum of 80° to a maximum of 166°, with O 2 concentration of 20% yielding perfect anisotropic mesa etch. Also at this O 2 concentration, reasonable Si/Ge selectivity is possible. These observations indicate that by adjusting the O 2 concentration, precision plasma etching of Si, Ge, and Ge:P is possible.Get price

Byproducts of Sulfur Hexafluoride (sf 6) Use in the Electric

Concentration (percent by volume)a HF Hydrogen fluoride 7664-39-3 1.0 SOF 2 (SF 4) b Thionyl sulfide (sulfur tetrafluoride) 7783-42-8 (7783-60-0) 0.5 SOF 4 Sulfur tetrafluoride oxide 13709-54-1 0.085 SiF 4 Silicon tetrafluoride 7783-61-1 0.085 S 2 F 10 (SF 5) c Disulfur decafluoride 5714-22-7 0.025 SO 2 F 2 Sulfuryl fluoride 2699-79-8 0.006 SOGet price

Sulfur hexafluoride - Wikipedia

Typical for a nonpolar gas, SF 6 is poorly soluble in water but quite soluble in nonpolar organic solvents. It has a density of 6.12 g/L at sea level conditions, considerably higher than the density of air. It is generally transported as a liquefied compressed gas. The concentration of SF 6 in Earthtroposphere reached 10 parts per trillion in year 2019, rising at 0.35 ppt/year. The increase over the prior 40 years was driven in large part by the expanding electric power sector, including fugiGet price

Comparison of etching processes of silicon and germanium in

Reactive ion etching of Si and Ge in sf6 gas–O2 is investigated. Etch rate shows that Si etching is selective with respect to Ge in gaz sf6–O2 (O2<50%); the reverse is observed in Sulfr hexafluoride–O2 (O2≳50%).Get price

Initial Environmental Examination

2. POLICY AND STATUARY REQUIREMENTS IN PAKISTAN 6 2.1 Policy and Statutory Requirements in Pakistan 6 2.2 Statutory Framework 6 2.3 Pakistan Environmental Protection Agency Review of IEE/EIA Regulations 2000 6 2.4 National Environmental Quality Standards 7 2.5 Other Relevant Laws 7 3. DESCRIPTION OF THE PROJECT 8 3.1 Type of Project 8Get price

Silicon Nanostructuring Using gaz sf6/O2 Downstram Plasma Etching

The concentration curves, shown in Figure 2, exhibit a maximum for [F] at about 23% of O 2 in the discharge, and a monotonic increase of [O] with increasing of the oxygen percentage. Knizikevicius 16 performed a simulation of Si etching in SF 6 /O 2 plasma and found that at 27% O 2 , the concentration of F atoms approaches the maximum value.Get price

Etch rates for micromachining processing-part II

ETCH RATES OF Si, Ge, SiGe, AND C (nm/min) sccm, , mtorr. The polygermanium deposition was preceded by the deposition of silicon seed layer approximately 6 nm thick using the recipe sccm,, mtorr. Germanium forms an oxide that is soluble in water. Thus, water with a high concentration of dissolved oxygen etches ger-manium.Get price

செ. இரா. செல்வக்குமார் (C.R.Selvakumar) | University of

Compared with CF4 + O1 plasma, 9 insulating gas + O2 plasma has a much larger concentration of atomic fluorine which in turn gives rise to a higher silicon etch rate.l~ A prime goal in this study is to evaluate th_e effect of N~ additive in two different plasma systems studied, namely, CF4 + O2 and Sulfr hexafluoride + O2 and to assess the resulting damage from Sulfr hexafluoride + O1Get price

CO2 emissions - Our World in Data

This page is just one in our collection of work on CO 2 and Greenhouse Gas Emissions. The rest can be explored via the navigation menu at the top of this page. There you can explore emissions of other greenhouse gases; where our emissions come from; what trajectories of future emissions look like; and what is driving emissions across the world.Get price

Calcium hydroxide - Wikipedia

Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula Ca() 2.It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed or slaked with water.Get price

Traumatic submacular hemorrhage: available treatment options

Dec 11, 2019 · Holland et al. compared 50 μg of tPA followed by 0.04 ml of pure gaz sf6 injection versus 0.04 ml of pure Sulfr hexafluoride injection alone in 2 cases of SMH subsequent to choroidal rupture. VA of the patient treated with the combined procedure improved from 20/125 to 20/63 after 6 days and 20/32 after 10 weeks, stable at 1 year of follow-up.Get price

Sulfr hexafluoride: The Little Gas That Could… Make Global Warming Worse

Mar 25, 2021 · Similarly, the global mean concentration of SF 6 has increased steadily since tracking began in 1995 from approximately 3.5 parts per trillion or ppt to 10.5 ppt in 2021 (to date), a three-foldGet price

insulating gas Free HV GIS and Breakers

Why sf 6 Free GIS and breakers? Because alternatives are available 6 ABB, GE, Hitachi and Siemens have alternatives to sf 6 Year non-sf6 gas Live Tank Breakers will be available Year non-insulating gas Dead Tank Breakers will be available Year non-insulating gas GIS Will be available 70kV Available 2015 Available 2016 Available 2016 115kV Available 2017 Available 2017Get price

Sevoflurane Dosage Guide with Precautions -

Average MAC (minimum alveolar concentration) with sevoflurane in oxygen:-0 to 1 month: 3.3%-1 to less than 6 months: 3%-6 months to less than 3 years: 2.8%-3 to 12 years: 2.5% Average MAC with sevoflurane in 60% N2O/40% O2:-6 months to less than 3 years: 2% Comments:-The concentration required for maintenance of general anesthesia is age dependent.Get price

Emissions of the powerful greenhouse gas Sulfr hexafluoride are rising

Oct 24, 2019 · The damage potential of greenhouse gases depends on their concentration in the atmosphere, the length of time they stay there, and the strength of their impact. By volume the so-called F-gases make up one of the smallest levels of emissions, but have among the greatest global warming potential (GWP).Get price

Health and environmental dangers of gaz sf6-filled switchgear

Sulfr hexafluoride gas, used as a dielectric medium in circuit breakers and switchgear, has a global warming potential 24 000 times greater than CO2 and some of its by-products were used as chemical weapons in World War I. In life, in business, in the ordinary course of doing things, there is a certain level of risk […]Get price

Infant Pulse Oximetry in Pakistan Study - Full Text View

Aug 31, 2012 · Hypoxemia is an abnormally low concentration of oxygen in the blood, and is an important sign of cardio-respiratory compromise in acutely ill patients. Pulse oximetry (PO) is a rapid, portable, non-invasive and accurate method of measuring arterial hemoglobin oxygenation (Sp02), and can therefore be readily implemented to detect hypoxemia inGet price


visits to drudge 4/24/2021 022,546,932 past 24 hours 673,084,128 past 31 days 9,130,262,906 past yearGet price

Sulfur Hexafluoride - The gas with a double-edged sword

About gasworld. Month on month, the gasworld website is the market-leading news portal for the global industrial gas sector, growing at an unprecedented rate and keeping its readers at the forefront of breaking news, insightful analysis and must-see features across the industry.Get price

Global Monitoring Laboratory - Carbon Cycle Greenhouse Gases

Mar 05, 2021 · The table summarizes annual increases in atmospheric SF 6 based on globally averaged marine surface data.. PDF Version. The annual increase in atmospheric SF 6 in a given year is the increase in its abundance (mole fraction) from January 1 in that year to January 1 of the next year, after the seasonal cycle has been removed (as shown by the black lines in the figure above).Get price

Sulfur hexafluoride purification from mixtures with air: a

Using a molecular sieve concentration trap and previously developed laboratory electron capture chromatographic procedures, sulfur hexafluoride was determined from 40 cm/sup 3/ samples with levels as low as 0.03 x 10/sup -12/ cm/sup 3//cm/sup 3/ - more than an order of magnitude below the present tropospheric SF/sub 6/ concentration of 0.3 to 0.5 x 10/sup -12/ cm/sup 3//cm/sup 3/.Get price

Siemens – series 6 - Global | Siemens Global

Due to the concentration differences on both sides, there is partial pressure that differs. Since ZrO2 is electrically conductive at 650 °C, an ion migration occurs towards of the lower partial pressure. This results in a potential difference between the two electrodes, which is a measure of the oxygen concentration in the sample gas.Get price

Potent GHG sf 6 rapidly accumulating in atmosphere, driven by

Jul 06, 2020 · In an open-access study in the EGU journal Atmospheric Chemistry and Physics, an international team of researchers reports that the greenhouse gas sulfur hexafluoride (sf6 gas) is rapidly accumulating in the atmosphere, driven by the demand for insulating gas-insulated switchgear in developing countries.Get price

Assessment of 7Be concentration in outdoor ambient air.

In the present study, the activity concentration of 7Be in outdoor ambient air of Lahore city, Pakistan, has been measured employing two air samplers and using a high purity germanium [HP(Ge)] detector. The 7Be activity concentration was found in the range from 1.6 to 11.3 mBq m(-3) with a mean value of 5.4 mBq m(-3). PMID: 18784516Get price

Sulfur Hexafluoride (Sulfr hexafluoride) | PMEL Ocean Tracer Program

The gaz sf6 transient in the atmosphere lags that of CFC-12 by about 15 years, providing a new tool to directly compare changes in ventilation rates over this interval. The figure above shows: (A) Time series of the northern hemisphere surface concentrations (expressed as partial pressure in parts per trillion) of CFC-12 (solid) and sf6 gas (dashed) inGet price

Deep-Ocean Life Where Oxygen Is Scarce

Figure 3. Oxygen concentrations rise with depth along the slope of Volcano 7. The volcano’s summit protrudes into an oxygen-minimum zone, where oxygen concentrations range from near zero to 0.5 milliliter of oxygen per liter of seawater (darker blues). At the volcano’s base, the oxygen concentration is much higher, at 3 milliliters per liter.Get price

Evacuation Sf6 Filling Unit, गैस फिलिंग मशीन in Makarpura

Air Moisture Evacuation and gaz sf6 Gas Filling Unit is a portable handcart which is designed and developed to evacuate air moisture, vacuum and fill Sulfur Hexafluoride (gaz sf6) gas with précised pressure regulation to gaz sf6 Gas Breakers. S P E C I F I C A T I O N F E A T U R E S. M S Powder Coated Hand Trolley with 10” Rubber Mould Wheel.Get price

Maintenance Of Sulfr hexafluoride Gas Circuit Breakers - EEP

Properties of gaz sf6 (Sulfur Hexafuoride) GasHandling Nonfaulted sf6 gasHandling Faulted sf6 gasDisposal of Wastea) ToxicityGet price