AC Breakdown Strength and Its By-Products of Eco-Friendly Perfluoroisobutyronitrile/O2/N2 Gas Mixture at High Pressure for HV Equipment

Extracts from fruit processing by-products usually present high amounts of bioactive compounds with several important activities such as antioxidant and antimicrobial capacities.

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High Pressure Supercritical Carbon Dioxide Separation from its Mixture with Nitrogen at Different Temperatures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1008.1 ◽

2020 ◽

Vol 1008 ◽

pp. 1-14

Author(s):

Rehab M. El-Maghraby ◽

Mahmoud Ramzy ◽

Ahmed K. Aboul-Gheit

Keyword(s):

Carbon Dioxide ◽

High Pressure ◽

Membrane Separation ◽

Point Sources ◽

Gas Mixture ◽

Carbon Dioxide Separation ◽

Different Temperatures ◽

Supercritical Phase ◽

High Concentrations ◽

Set Up

Carbon dioxide (CO2) capturing from point sources is currently being proposed as a way to minimize CO2 emissions to the atmosphere. Carbon dioxide is considered one of the greenhouse gases that affects our environment. Legislations are being enforced in many countries to limit CO2 emissions to the atmosphere. Two methods are mostly used for CO2 capturing from flue gases and natural gases; the first method is absorption using amine-based solvents, while the second is membrane separation. The first method is effective for CO2 separation from gas mixtures with low CO2 concentration in the range of 10 to 20%, while the other can handle gas mixture with intermediate CO2 concentration but there is a limit on the CO2 purity. Hence, such methods cannot be used in pre-combustion and oxy fuel technologies where a more concentrated CO2 gas stream is produced. Throughout this work, a new method is introduced to separate carbon dioxide from its mixture with nitrogen (N2) at high concentrations, 90 mol.% CO2 and 10 mol.% N2 gas mixture. A customized high-pressure experimental set-up was built. Three temperature were tested: 15 °C, 25 °C and 38 °C at 150 bar. At such condition CO2 will be in the liquid and the supercritical phase respectively. The composition of the top and bottom streams where analyzed. The amount of CO2 in the top stream was the smallest at the supercritical condition. In addition, the purity of CO2 in the bottom stream was the highest at 38 °C and 150 bars, when CO2 is at the supercritical phase.

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Method to optimize high-pressure, multicomponent gas mixing

Journal of Applied Physiology ◽

10.1152/jappl.1976.41.6.960 ◽

1976 ◽

Vol 41 (6) ◽

pp. 960-963 ◽

Cited By ~ 1

Author(s):

R. Scacci

Keyword(s):

High Pressure ◽

Gas Mixture ◽

Gas Mixing ◽

Arbitrary Size ◽

Multicomponent Gas ◽

Pressure Storage ◽

Multicomponent Gas Mixture

By use of the equations derived herein, a method is outlined to determine the optimum filing sequence and to obtain the maximum possible pressure when two or more pure high-pressure gases are to be transferred to a receiver cylinder in order to prepare a multicomponent gas mixture. The method is valid for any number of gas components, originating from high-pressure storage cyclinders of arbitrary size and pressure and for a receiver cylinder to contain initially one or more of the component gases. Percentage concentrations within 1% of desired are easily obtained with this method.

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Potential theory for prediction of high-pressure gas mixture adsorption on activated carbon and MOFs

Separation and Purification Technology ◽

10.1016/j.seppur.2014.08.021 ◽

2014 ◽

Vol 135 ◽

pp. 229-242 ◽

Cited By ~ 7

Author(s):

E. Dundar ◽

R. Zacharia ◽

R. Chahine ◽

P. Bénard

Keyword(s):

High Pressure ◽

Activated Carbon ◽

Potential Theory ◽

Gas Mixture ◽

Mixture Adsorption ◽

Gas Mixture Adsorption

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Aerodynamic Design and Verification of a Two-Stage Turbine With a Supersonic First Stage

Journal of Engineering for Power ◽

10.1115/1.3446333 ◽

1978 ◽

Vol 100 (2) ◽

pp. 197-202 ◽

Cited By ~ 3

Author(s):

R. L. Binsley ◽

J. L. Boynton

Keyword(s):

High Pressure ◽

Pressure Ratio ◽

Maximum Efficiency ◽

Test Results ◽

Aerodynamic Design ◽

Design Concepts ◽

High Pressure Ratio ◽

Hydrazine Decomposition ◽

Test Verification ◽

By Products

The detailed aerodynamic design and test verification of a 6000-hp (4474-kW) turbine with a supersonic first stage for an airborne application is described. The 12.3-in. (312.4-mm) pitch diameter turbine is driven by products of hydrazine decomposition at 700 psia (4.826 MPa) and 2110 R (1172 K) with an overall pressure ratio of 41.2. The design of the supersonic nozzles and rotor incorporated improved concepts compared to previously reported designs. Test results show that the predicted performance was verified. The supersonic design concepts described are applicable to other high-pressure ratio designs where maximum efficiency is required.

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