Effect of K2CO3 Addition on CO2 Gasification Characteristics and Ash Sintering Behaviour of a Chinese Lignite at Different Temperatures and Pressures as Examined Using a High-Pressure Thermogravimetric Analyser

2021 ◽  
pp. 159-177
Author(s):  
Jianbo Li ◽  
Zhezi Zhang ◽  
Jian Hao ◽  
Jiguang Zhang ◽  
Mingming Zhu ◽  
...  
Keyword(s):  
High Pressure ◽  
Co2 Gasification ◽  
Different Temperatures ◽  
Sintering Behaviour

scholarly journals Role of temperature in the numerical analysis of CaO under high pressure

2010 ◽  
Vol 8 (1) ◽  
pp. 126-133 ◽  
Author(s):  
Purvee Bhardwaj ◽  
Sadhna Singh
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Numerical Analysis ◽  
Thermodynamic Properties ◽  
Elastic Constants ◽  
Volume Change ◽  
Thermodynamical Properties ◽  
Phase Transition Pressure ◽  
Different Temperatures

AbstractIn this paper we focus on the elastic and thermodynamic properties of the B1 phase of CaO by using the modified TBP model, including the role of temperature. We have successfully obtained the phase transition pressure and volume change at different temperatures. In addition elastic constants and bulk modulus of B1 phase of CaO at different temperatures are discussed. Our results are comparable with the previous ones at high temperatures and pressures. The thermodynamical properties of the B1 phase of CaO are also predicted.

Desirability of Oysters Treated by High Pressure Processing at Different Temperatures and Elevated Pressures

2014 ◽  
Vol 9 (4) ◽  
pp. 209-216 ◽  
Author(s):  
David H. Kingsley ◽  
David D. Kuhn ◽  
George J. Flick ◽  
Jungmi Oh ◽  
Laura S. Lawson ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Processing ◽  
Elevated Pressures ◽  
Different Temperatures

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

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.

scholarly journals In Situ Initial Growth Studies of SrTiO3 on SrTiO3 by Time Resolved High Pressure RHEED

1998 ◽  
Vol 526 ◽  
Author(s):  
Gertjan Koster ◽  
Guus J.H.M. Rijnders ◽  
Dave H.A. Blank ◽  
Horst Rogalla
Keyword(s):  
High Pressure ◽  
Pulsed Laser ◽  
High Energy ◽  
Initial Growth ◽  
Time Resolved ◽  
Force Microscopy ◽  
Atomic Force ◽  
Different Temperatures ◽  
Substrate Surfaces

AbstractThe initial growth of pulsed laser deposited SrTiO3 on SrTiO3 has been studied using high pressure Reflection High Energy Electron Diffraction (RHEED) and Atomic Force Microscopy (AFM). For this, we developed a Pulsed Laser Deposition (PLD)-RHEED system, with the possibility to study the growth and to monitor the growth rates, in situ, at typical PLD pressures (10-50 Pa). Using perfect single crystal SrTiO3 substrate surfaces, we observe true 2D intensity oscillations at different temperatures. Simultaneously, information on the diffusion of the deposited material on the surface could be extracted from the relaxation of the intensity after each laser pulse. The characteristic times depend on pressure and temperature as well as the 2D coverage during growth.

Effect of High-Pressure Solution Temperature on Microstructure and Mechanical Properties of AZ61 Magnesium Alloy

2012 ◽  
Vol 580 ◽  
pp. 505-508 ◽  
Author(s):  
Yu Shan Li
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Magnesium Alloy ◽  
Atmospheric Temperature ◽  
Optical Microscope ◽  
Solution Temperature ◽  
Hardness Tester ◽  
Az61 Magnesium Alloy ◽  
Mg17al12 Phase ◽  
Different Temperatures

As-cast AZ61 magnesium alloy was treated by solution under a high-pressure of 3 Gpa at different temperatures, atmospheric temperature, 200, 400, 600, 800 and 1000 °C. The microstructure of the products was observed by optical microscope. The mechanical properties of the products were investigated by brinell hardness tester and tensile testing. The results show that increasing solution temperature promotes the dissolution into α-Mg matrix of β-Mg17Al12 phase of AZ61 alloy, especially for over 400 °C. With increasing solution temperature, the tensile strength and elongation percentage of AZ61 increase gradually, but the hardness decreases.

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