A Core Based Comparison Of The Reaction Characteristics Of Emulsified And In-Situ Gelled Acids In Low Permeability, High Temperature, Gas Bearing Carbonates

2001 ◽  
Author(s):  
Jack D. Lynn ◽  
H.A. Nasr-El-Din
Keyword(s):  
High Temperature ◽  
Low Permeability ◽  
Reaction Characteristics ◽  
Gas Bearing ◽  
High Temperature Gas

An in situ x-ray absorption spectroscopic cell for high temperature gas-flow measurements

1998 ◽  
Vol 69 (7) ◽  
pp. 2618-2621 ◽  
Author(s):  
George Meitzner ◽  
Simon R. Bare ◽  
Deborah Parker ◽  
Hyung Woo ◽  
Daniel A. Fischer
Keyword(s):  
High Temperature ◽  
Gas Flow ◽  
Flow Measurements ◽  
X Ray ◽  
X Ray Absorption ◽  
High Temperature Gas

scholarly journals Integration of High Temperature Gas Reactors with in Situ Oil Shale Retorting

2012 ◽  
Vol 61 (1T) ◽  
pp. 452-457
Author(s):  
Eric P. Robertson ◽  
Michael G. McKellar ◽  
Lee O. Nelson
Keyword(s):  
High Temperature ◽  
Oil Shale ◽  
High Temperature Gas

Oxide Layers Mechanical Properties for Ni Base Alloys in HTR Environment

2008 ◽  
Vol 595-598 ◽  
pp. 501-509
Author(s):  
Damien Kaczorowski ◽  
Gouenou Girardin ◽  
S. Chamousset
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Heat Exchanger ◽  
Tensile Test ◽  
Oxide Layers ◽  
Intermediate Heat Exchanger ◽  
Nickel Base ◽  
Very High ◽  
High Temperature Gas

Nickel base alloys 617 and 230 are promising candidates for the Intermediate Heat eXchanger (IHX) of GenIV Very High Temperature gas cooled Reactors. The capability to maintain an oxide layer as an efficient barrier against corrosion under mechanical loading is investigated through SEM in situ tensile test. The mechanical properties of external oxide layers are so compared between the two alloys. Cracks and spallation are observed. Few differences could be observed between these two alloys when pre oxidized in impure helium.

Deep Burn Strategy for Pure Reactor-Grade Plutonium in Pebble Bed High Temperature Gas-Cooled Reactors

2008 ◽  
Author(s):  
Eben Mulder ◽  
Dawid Serfontein ◽  
Eberhard Teuchert
Keyword(s):  
High Temperature ◽  
Fuel Cycle ◽  
Waste Incineration ◽  
Β Decay ◽  
Pebble Bed ◽  
Pebble Bed Reactors ◽  
Advanced Fuel ◽  
Very High ◽  
High Temperature Gas

In this article an advanced fuel cycle for pebble bed reactors is introduced that can safely and efficiently incinerate pure reactor-grade Pu [Pu(LWR)], thereby fulfilling the bulk of the GNEP waste incineration requirements. It is shown below that the very high fissile content of the Pu(LWR)-fuel enables it to convert practically all of the 240Pu to 241Pu and incinerate it. Since the fuel contains no 238U, no fresh 239Pu is produced. The 239Pu is reduced in-situ by 99.5% and the 240Pu by 97.6%. The only significant fissile isotope remaining is 241Pu, however, it will decay with a half life of 14.4 years to the fertile 241Am by β-decay.

In-Situ Acid System to Clean Up Drill-in Fluid Damage in High Temperature Gas Wells

2006 ◽  
Author(s):  
Mohammed Badri Al-Otaibi ◽  
Hisham A. Nasr-El-Din ◽  
Abdullah Mohammad Al Moajil
Keyword(s):  
High Temperature ◽  
Acid System ◽  
Gas Wells ◽  
High Temperature Gas

An Environmental Wet Cell For High Voltage Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 18-19
Author(s):  
N.J. Tighe ◽  
H.M. Flower ◽  
P.R. Swann
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Image Quality ◽  
Inelastic Scattering ◽  
High Voltage ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
Environmental Cell ◽  
Water Saturated ◽  
High Temperature Gas

A differentially pumped environmental cell has been developed for use in the AEI EM7 million volt microscope. In the initial version the column of gas traversed by the beam was 5.5mm. This permited inclusion of a tilting hot stage in the cell for investigating high temperature gas-specimen reactions. In order to examine specimens in the wet state it was found that a pressure of approximately 400 torr of water saturated helium was needed around the specimen to prevent dehydration. Inelastic scattering by the water resulted in a sharp loss of image quality. Therefore a modified cell with an ‘airgap’ of only 1.5mm has been constructed. The shorter electron path through the gas permits examination of specimens at the necessary pressure of moist helium; the specimen can still be tilted about the side entry rod axis by ±7°C to obtain stereopairs.

The reaction of amorphous Ni-Nb films with Si in the presence of a native SiO2 layer

1990 ◽  
Vol 48 (4) ◽  
pp. 664-665
Author(s):  
N. Rozhanski ◽  
A. Barg
Keyword(s):  
High Temperature ◽  
Crystallization Temperature ◽  
Diffusion Barriers ◽  
Sio2 Layer ◽  
Si Substrate ◽  
Cross Sectional ◽  
Plan View ◽  
Temperature Range ◽  
Sputter Deposited

Amorphous Ni-Nb alloys are of potential interest as diffusion barriers for high temperature metallization for VLSI. In the present work amorphous Ni-Nb films were sputter deposited on Si(100) and their interaction with a substrate was studied in the temperature range (200-700)°C. The crystallization of films was observed on the plan-view specimens heated in-situ in Philips-400ST microscope. Cross-sectional objects were prepared to study the structure of interfaces.The crystallization temperature of Ni5 0 Ni5 0 and Ni8 0 Nb2 0 films was found to be equal to 675°C and 525°C correspondingly. The crystallization of Ni5 0 Ni5 0 films is followed by the formation of Ni6Nb7 and Ni3Nb nucleus. Ni8 0Nb2 0 films crystallise with the formation of Ni and Ni3Nb crystals. No interaction of both films with Si substrate was observed on plan-view specimens up to 700°C, that is due to the barrier action of the native SiO2 layer.

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