scholarly journals Membranes for the Gas/Liquid Phase Separation at Elevated Temperatures: Characterization of the Liquid Entry Pressure

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 907
Author(s):  
Sara Claramunt ◽  
Florian Völker ◽  
Uta Gerhards ◽  
Manfred Kraut ◽  
Roland Dittmeyer
Keyword(s):  
Liquid Phase ◽  
Elevated Temperatures ◽  
Ceramic Membranes ◽  
Step Method ◽  
Application Range ◽  
Pressure Step ◽  
Hydrophobic Membranes ◽  
Entry Pressure ◽  
Main Factor

Hydrophobic membranes were characterized at elevated temperatures. Pressure was applied at the feed and permeate side to ensure liquid phase conditions. Within this scope, the applicability of different polymeric and ceramic membranes in terms of liquid entry pressure was studied using water. The Visual Method and the Pressure Step Method were applied for the experimental investigation. The results show the Pressure Step Method to be an early detection method. The tests at higher pressure and temperature conditions using the Pressure Step Method revealed the temperature as being the main factor affecting the liquid entry pressure. Novel LEP data up to 120 °C and 2.5 bar were obtained, which broadens the application range of hydrophobic membranes.

In-Situ Characterization of Growth and Intermixing at a Heteroepitaxial Interface: Fe on Au(001)

1993 ◽  
Vol 318 ◽  
Author(s):  
Q. Jiang ◽  
A. Chan ◽  
Y.-L. He ◽  
G.-C. Wang
Keyword(s):  
Elevated Temperatures ◽  
Chemical Elements ◽  
Background Intensity ◽  
In Situ Characterization ◽  
Initial Stage ◽  
Monolayer Growth ◽  
Low Energy Electron ◽  
Energy Dependent

ABSTRACTThe growth and chemical intermixing of submonolayer and a few monolayer thick Fe films on a Au(001) surface was studied by High Resolution Low Energy Electron Diffraction (HRLEED) technique. Through the analysis of the energy dependent angular profiles as a function of time, we obtained the distribution of islands and distribution of spacings during submonolayer growth. The interference of electron waves from different chemical elements in terraces at different heights in the surface contributes to the background intensity and broadening in the angular profiles of diffraction beams. A subsurface Fe capped by Au islands as a result of atomic place exchange was observed at the initial stage of monolayer growth. From the energy dependent angular profiles as a function of temperature, we determine the quantitative change of inhomogeneity length (∼20 Å) at the interface of ultrathin films at elevated temperatures due to intermixing.

Methanol–methanol and methanol–water systems: the intermolecular interactions controlling the transition from small clusters to the liquid phase

2017 ◽  
Vol 19 (25) ◽  
pp. 16765-16774 ◽  
Author(s):  
Margarita Albertí ◽  
Anna Amat ◽  
Antonio Aguilar ◽  
Fernando Pirani
Keyword(s):  
Liquid Phase ◽  
Intermolecular Interactions ◽  
Water Systems ◽  
Water Molecules ◽  
Small Clusters

The present paper focuses on the characterization of the properties of methanol and water molecules in gas and liquid enviroments.

Surface Characterization of GaN(0001) Grown by Liquid Phase Epitaxy Using Coaxial Impact-Collision Ion Scattering Spectroscopy

2008 ◽  
Vol 47 (9) ◽  
pp. 7281-7284 ◽  
Author(s):  
Hirofumi Suto ◽  
Shunjiro Fujii ◽  
Fumio Kawamura ◽  
Masashi Yoshimura ◽  
Yasuo Kitaoka ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Epitaxy ◽  
Surface Characterization ◽  
Ion Scattering ◽  
Ion Scattering Spectroscopy

Current controlled liquid phase epitaxial growth and characterization of InGaAsP

1984 ◽  
Vol 70 (1-2) ◽  
pp. 162-168 ◽  
Author(s):  
S. Iyer ◽  
E.K. Stefanakos ◽  
A. Abul-Fadl ◽  
W.J. Collis
Keyword(s):  
Liquid Phase ◽  
Epitaxial Growth ◽  
Liquid Phase Epitaxial ◽  
Liquid Phase Epitaxial Growth

The High Temperature Deformation Behavior of A Cr2Nb Ordered Intermetallic System

1990 ◽  
Vol 213 ◽  
Author(s):  
G. E. Vignoul ◽  
J.M. Sanchez ◽  
J. K. Tien
Keyword(s):  
Deformation Behavior ◽  
Elevated Temperatures ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Deformation Law ◽  
Ordered Intermetallic ◽  
Intermetallic System ◽  
Increasing Temperature ◽  
Stress Term

ABSTRACTA basic characterization of the deformation behavior of Cr2Nb by microindention at ambient and elevated temperatures (up to 1400 °C) was undertaken. The microhardness of this system was seen to decrease with increasing temperature, from 1040 MPa at 25°C to 322 MPa at 1400 °C. Further, the microindention creep behavior of this system was studied by varying time on load at T = 1000 and 1200°C. Analysis of the data showed that m = 24 and Qapp = 477.61 kJ/mole. These unusually high values are indicative of the existence of an effective resisting stress against creep. When the data was fit against a microindention creep deformation law which was modified to incorporate an effective resisting stress term, it was determined that m = 4.5, Qcreep = 357 kJ/mole and the resisting stress term σr = 300 MPa.

Characterization of Wafer-Level Au-In-Bonded Samples at Elevated Temperatures

2015 ◽  
Vol 46 (6) ◽  
pp. 2637-2645 ◽  
Author(s):  
Thi-Thuy Luu ◽  
Nils Hoivik ◽  
Kaiying Wang ◽  
Knut E. Aasmundtveit ◽  
Astrid-Sofie B. Vardøy
Keyword(s):  
Elevated Temperatures ◽  
Wafer Level

Measurement of the Material State Including the Effects of Recovery and Recrystallization

2000 ◽  
Author(s):  
M. E. Bange ◽  
A. J. Beaudoin ◽  
M. G. Stout ◽  
S. R. MacEwen
Keyword(s):  
Elevated Temperatures ◽  
High Strain ◽  
Quantitative Measure ◽  
Experimental Program ◽  
Strain Rates ◽  
Compression Tests ◽  
State Variable ◽  
Mechanical Threshold ◽  
Material State

Abstract Deformation at elevated temperatures in combination with high strain rates leads to recovery and recrystallization in aluminum alloys. Previous work in recrystallization has emphasized the detailing of microstructural trend in progression from the deformed to the annealed state. In the following, we examine the effect of rate dependence on deformation on AA 5182 and AA 6061. It is demonstrated that identification of underlying microstructural mechanisms is critical. An experimental program is then outlined for characterization of recovery and recrystallization of AA 5182. Instantaneous hardening rate and flow stress are developed from interrupted compression tests. These data are used to establish a quantitative measure of recovery through evaluation of a state variable for work hardening, the mechanical threshold. It is intended that the results serve as a foundation for development of relations for evolution of a mechanical state variable in the presence of recrystallization. Such a framework is necessary for the practical prediction of interstand recrystallization in hot rolling operations.

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