High-Pressure Solubility of Carbon Dioxide (CO2) in Aqueous 1-Methyl Piperazine Solution

2014 ◽  
Vol 59 (11) ◽  
pp. 3610-3623 ◽  
Author(s):  
Aravind V. Rayer ◽  
Yamuna Armugam ◽  
Amr Henni ◽  
Paitoon Tontiwachwuthikul
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Carbon Dioxide Co2

The Tribological Behaviors of the Surfaces Lubricated by Polyaklylene Glycol and Polyolester Oils in Carbon Dioxide Environment

2006 ◽  
Vol 321-323 ◽  
pp. 1548-1551
Author(s):  
Se Doo Oh ◽  
Tae Shik Ahn ◽  
Sung Oug Cho ◽  
Young Ze Lee
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Hard Coatings ◽  
Rotary Compressor ◽  
Wear Volume ◽  
Test Results ◽  
Sliding Surfaces ◽  
Carbon Dioxide Co2 ◽  
Air Conditioning Systems ◽  
Rotary Type

The carbon dioxide (CO2) is investigated as an alternative refrigerant to replace HFC (hydro fluorocarbon) refrigerants in refrigerators and air conditioning systems due to the environmental concerns. Because new compressors with the carbon dioxide are going to be operated under the high pressure, the tribology of sliding surfaces in the compressor becomes very important. To develop new compressors, especially rotary type, the friction and wear characteristics of sliding surfaces between a vane and a roller in the rotary compressor were evaluated in this paper. Several hard coatings, such as TiN, CrN, and WC/C, were applied on vane surfaces in order to improve the tribological characteristics, and their performances were evaluated experimentally. The vane-on-disk type sliding tests were carried out under the various sliding speeds, normal loads, and carbon dioxide pressures with an exclusive high pressure wear tester. From the tests wear volume of vane surfaces applied various coatings were compared. During the tests coefficients of friction and surface temperatures were monitored. Test results showed that WC/C coatings showed good tribological properties. TiN and CrN coated vanes showed good wear resistance properties but produced high friction.

scholarly journals HIC and SSC of Carbon Steel in High Partial Pressure CO2 Environments with Elevated H2S

2021 ◽  
Vol 287 ◽  
pp. 02001
Author(s):  
Ahmad Zaki Abas ◽  
Azmi Mohammed Nor ◽  
Muhammad Firdaus Suhor ◽  
Ahmad Mustaza Ahmad Rusli ◽  
Mokhtar Che Ismail
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Carbon Steel ◽  
Field Condition ◽  
Standard Test ◽  
Sulfide Concentration ◽  
Surface Cracking ◽  
Sulfide Stress ◽  
Carbon Dioxide Co2 ◽  
Sour Service

The Hydrogen Induced Cracking (HIC) and Sulfide Stress Cracking (SSC) behaviours of sour service and non-sour service carbon steel API 5L X65 were investigated under high pressure carbon dioxide environments, containing elevated amount of hydrogen sulphide (H2S); the test environments simulated offshore pipelines transporting full-well streams in high carbon dioxide (CO2) environments with elevated H2S concentrations. It was systematically studied under standard NACE condition and high pressure carbon dioxide field condition with variation in other key parameters (temperature, pressure and hydrogen sulfide concentration). The HIC and SSC were tested using a High Pressure and High Temperature (HPHT) Autoclave. The surface cracking morphology was analysed using Scanning Electron Microscopy (SEM), Ultrasonic Technique (UT) and Magnetic Particle (MP). The results showed that no cracks were detected in NACE standard and field-condition SSC tests for both sour service and non-sour services carbon steel. In HIC test, crack was detected on non-sour service carbon steel in NACE standard test while no crack was detected on field condition-based tests for both types of carbon steel.

Quartz Crystal Microbalance (QCM) in High-Pressure Carbon Dioxide (CO2):  Experimental Aspects of QCM Theory and CO2Adsorption

Langmuir ◽  
2004 ◽  
Vol 20 (9) ◽  
pp. 3665-3673 ◽  
Author(s):  
You-Ting Wu ◽  
Paa-Joe Akoto-Ampaw ◽  
Mohamed Elbaccouch ◽  
Michael L. Hurrey ◽  
Scott L. Wallen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Carbon Dioxide Co2

High pressure solubility of carbon dioxide (CO2) in aqueous piperazine solutions

2010 ◽  
Vol 292 (1-2) ◽  
pp. 20-28 ◽  
Author(s):  
Salim Kadiwala ◽  
Aravind V. Rayer ◽  
Amr Henni
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Carbon Dioxide Co2

Tribological Studies of Compressor Surfaces in the Presence of Carbon Dioxide Under Extreme Environmental Pressure Conditions

2005 ◽  
Author(s):  
Nicholaos G. Demas ◽  
Andreas A. Polycarpou
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
High Pressures ◽  
Environmental Pressures ◽  
Thermodynamic Studies ◽  
Environmental Pressure ◽  
Ultra High Pressure ◽  
Carbon Dioxide Co2 ◽  
Internal Pressures ◽  
Very High

The refrigeration industry has shown an inclination towards the use of carbon dioxide (CO2) as a refrigerant in some applications. While extensive thermodynamic studies exist, tribological studies with CO2 are limited and tribological testing has further been restricted to low environmental pressures up to 1.38 MPa (200 psi) due to limitations in equipment capabilities. In this work, experiments were performed using an Ultra High Pressure Tribometer (UHPT) that was custom designed and built for tribological testing of compressor contact interfaces at very high environmental pressures up to 13.8 MPa (2000 psi). These tests demonstrate the possibility of testing at very high pressures similar to the internal pressures of CO2 compressors.

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