Modelling gas pressure effects on explosive rock breakage

1988 ◽  
Vol 6 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Rahim Haghighi ◽  
Robert R. Britton ◽  
Duane Skidmore
Keyword(s):  
Gas Pressure ◽  
Pressure Effects ◽  
Rock Breakage

High gas pressure effects on yeast

2008 ◽  
Vol 101 (4) ◽  
pp. 729-738 ◽  
Author(s):  
V. Espinasse ◽  
J.-M. Perrier-Cornet ◽  
A. Marecat ◽  
P. Gervais
Keyword(s):  
Gas Pressure ◽  
Pressure Effects

Pressure Effects on the Lifetime of Gas High Density Polyethylene Pipes

2021 ◽  
Author(s):  
Yang Wang ◽  
Hui-qing Lan ◽  
Tao Meng ◽  
Bing Wang ◽  
Du du Guo ◽  
...  
Keyword(s):  
Natural Gas ◽  
Induction Time ◽  
High Density Polyethylene ◽  
Reaction Rate ◽  
Low Pressure ◽  
Gas Pressure ◽  
High Density ◽  
Pressure Effects ◽  
Polyethylene Pipes ◽  
Hdpe Pipes

Abstract The purpose of this study was to propose low gas pressure effects on lifetime of natural gas high density polyethylene (HDPE) pipes by thermal-oxidative aging (TOA). The new method to assess the lifetime of HDPE natural gas pipes is based on gas pressure testing. An approach to monitor oxidative induction time (OIT) has been used to predict lifetime. Natural gas HDPE pipes were used to evaluate the effects of low gas pres-sures on oxidative induction time. In order to emphasize the pressure effects, relatively low temperatures at 45, 55, 65 and 75 °C were utilized for the exposure. The low-pressure conditions were created using air at levels of 0, 0.1, 0.2, 0.3 and 0.4 MPa. The property of high density polyethylene pipes was effectively moni-tored using the low pressure oxidative induction time (OIT) test. The results show that the aging reaction rate of high density polyethylene pipes increased exponentially with temperature and gas pressure according to the Arrhenius equation. Analytical models were developed to predict the aging reaction rate and lifetime of natural gas HDPE pipes.

Gas pressure effects on the rates of catalytic H2 oxidation by hydrogenases

2010 ◽  
Vol 46 (44) ◽  
pp. 8463 ◽  
Author(s):  
James A. Cracknell ◽  
Bärbel Friedrich ◽  
Fraser A. Armstrong
Keyword(s):  
Gas Pressure ◽  
Pressure Effects ◽  
H2 Oxidation

Experimental Study on Gas Pressure Effects on Gas Desorption Characteristic of Coal Seam

2013 ◽  
Vol 318 ◽  
pp. 367-370 ◽  
Author(s):  
Lin Chao Dai ◽  
Da Yong Lu ◽  
Zhen Liu
Keyword(s):  
Coal Seam ◽  
Gas Adsorption ◽  
Experimental System ◽  
Gas Pressure ◽  
Pressure Effects ◽  
Gas Content ◽  
Equilibrium Pressure ◽  
Gas Desorption ◽  
Exploitation And Utilization ◽  
The Impact

To further explore the impact of gas pressure on gas desorption and flowing law, the gas desorption experimental system designed autonomously is used to carry out studies on gas desorption experiment under different gas pressures. By data fitting, the relationship between gas desorption quantity and time is obtained and also established the model for gas desorption. The results show that: the gas desorption quantity curves is "The first half rises sharply, the latter half segment is gently rising and eventually becomes stabilized", and when the gas adsorption equilibrium pressure is the greater, the gas desorption amount is greater. And the formula can describe the gas desorption law well, the correlation coefficient R2 is above 0.97. The study provides an important theory reference to coal and gas outburst prediction, coal seam gas content prediction and its exploitation and utilization.

Gas pressure effects on the structure of CNxthin films deposited by laser ablation

2005 ◽  
Vol 160 (10-12) ◽  
pp. 601-608
Author(s):  
F. Barreca ◽  
E. Fazio ◽  
F. Neri ◽  
E. Barletta ◽  
S. Trusso ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Gas Pressure ◽  
Pressure Effects
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