Heat treatment in carbon dioxide atmosphere

1960 ◽  
Vol 2 (11) ◽  
pp. 609-609 ◽  
Author(s):  
V. A. Shebanov
Keyword(s):  
Carbon Dioxide ◽  
Heat Treatment ◽  
Carbon Dioxide Atmosphere

Calcite Bone Substitute Prepared from Calcium Hydroxide Compact Using Heat-Treatment under Carbon Dioxide Atmosphere

2011 ◽  
Vol 493-494 ◽  
pp. 166-169 ◽  
Author(s):  
Kanji Tsuru ◽  
Akihiro Otsu ◽  
Michito Maruta ◽  
Alireza Valanezhad ◽  
Giichiro Kawachi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Heat Treatment ◽  
Calcium Hydroxide ◽  
Heating Temperature ◽  
High Mechanical Property ◽  
X Ray ◽  
Carbon Dioxide Atmosphere ◽  
Short Period ◽  
Diametral Tensile Strength ◽  
Intergranular Space

The purpose of this study is to investigate whether calcite blocks with high mechanical property could be obtained for a short period from calcium hydroxide (Ca(OH)2) compact using heat-treatment under carbon dioxide (CO2) atmosphere. The Ca(OH)2 disks compacted with different pressure was heated at different temperature ranging from 200°C to 800°C for an hour under CO2 atmosphere. From the X-ray diffractometry, Ca(OH)2 converted into calcite along with the rise of the heating temperature. Small amount of unreacted Ca(OH)2 remained in samples heated at 600°C whereas samples treated at 800°C converted to calcite with very small amount of calcium oxide. The diametral tensile strength (DTS) value increased with the rise of heating temperature up to 600°C then decreased down to 800°C. Meanwhile, the porosity decreased with the rise of heating temperature up to 600°C then slightly increased up to 800°C. From the scanning electron microscope observation, grains grew bigger along with the rise of heating temperature. Intergranular space between grains decreased from 200°C to 600°C. The highest DTS value (14 MPa±1.3) at 600°C could be the result of lesser intergranular space due to sintering.

Thermodynamic Studies of Iron Carbonate Solubility in Aqueous Monoethylene Glycol Mixtures and CO2 Atmosphere

2016 ◽  
Vol 830 ◽  
pp. 134-138 ◽  
Author(s):  
Camila Senna Figueiredo ◽  
Jailton Ferreira do Nascimento ◽  
Rony Oliveira de Sant'ana ◽  
Deborah Cordeiro de Andrade ◽  
Zaniel Souto Dantas Procópio ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
High Capacity ◽  
Gas Production ◽  
Aqueous Mixtures ◽  
Iron Carbonate ◽  
Low Viscosity ◽  
Carbon Dioxide Atmosphere ◽  
Equilibrium Data ◽  
Monoethylene Glycol

Monoethylene glycol (MEG) is being widely applied as thermodynamic inhibitor to avoid formation of natural gas hydrates. High hydrophilicity, low toxicity, low viscosity, low solubility in liquid hydrocarbons and high capacity of dissolving salts are advantageous for the use of MEG in the natural gas production. In addition, MEG recovery can be easily achieved considering its low volatility in relation to water, which makes the process economical and environmentally feasible. The reuse of MEG is being theme of research and phase equilibrium data for the involved species are required. In this work, a experimental procedure to synthetize iron carbonate and, afterwards, determine its solubility in aqueous mixtures of MEG in the presence of carbon dioxide atmosphere have been developed. Furthermore, a series of solubility data has been measured. This work presents a worthy contribution to the description of iron carbonate aqueous solubilities in the presence of MEG and carbon dioxide, regarding the instability of the salt to respect of oxidation. Subsequently, the knowledge of the behavior of the iron carbonate solubilities is useful for the industrial unities of production of natural gas and recovery of MEG.

Growth of Clostridium perfringens in Fish Fillets Packaged with a Controlled Carbon Dioxide Atmosphere at Abuse Temperatures

1996 ◽  
Vol 59 (7) ◽  
pp. 704-710 ◽  
Author(s):  
BON KIMURA ◽  
SHUSAKU KURODA ◽  
MASATADA MURAKAMI ◽  
TATEO FUJII
Keyword(s):  
Carbon Dioxide ◽  
Clostridium Perfringens ◽  
Storage Time ◽  
Health Hazard ◽  
Food Poisoning ◽  
Lag Phase ◽  
Carbon Dioxide Gas ◽  
Fish Fillets ◽  
Carbon Dioxide Atmosphere ◽  
Gas Atmosphere

The growth of Clostridium perfringens inoculated in fish fillets of jack mackerel subsequently packaged under a controlled carbon dioxide gas atmosphere (40% CO2, 60% N2) was investigated at marginal growth (15°C) and stimulative ambient (30°C) handling temperatures. The fish fillets were inoculated with C. perfringens, packaged either with air or the modified controlled carbon dioxide atmosphere and stored at 15°C and 30°C. No increase in the C. perfringens population in the fish was noted regardless of the type of packaging at 15°C in 3 days storage time, when all samples were spoiled. C. perfringens rapidly increased in the abuse temperature (30°C) after a 2- to 4-h lag phase regardless of the package type, but growth was significantly more stimulated under the controlled carbon dioxide gas atmosphere within 6 h of storage time. When fish fillets inoculated with C. perfringens were stored at 5°C for 24 h before being held at 30°C for 6 h, C. perfringens did not grow during the abuse-temperature storage. This suggests a reduction of a health hazard risk by the organism when the distribution temperature of the fish fillets is strictly controlled below 5°C. However, the combination of two temperature-abuse events during distribution and consumer handling may lead to a higher food-poisoning risk by the organism in controlled CO2 modified atmosphere-packaged fish compared to air-packaged fish. Product control of the initial contamination of organisms at low levels during raw fish processing will prevent food poisoning

Pt-Ru/C anode performance of polymer electrolyte fuel cell under carbon dioxide atmosphere

2016 ◽  
Vol 206 ◽  
pp. 254-258 ◽  
Author(s):  
Sayoko Shironita ◽  
Kazutaka Sato ◽  
Kazuma Yoshitake ◽  
Minoru Umeda
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell ◽  
Carbon Dioxide Atmosphere

scholarly journals STRONTIUM CARBONATE SOLUBILITY DATA IN AQUEOUS MIXTURES OF MONOETHYLENEGLYCOL UNDER A CARBON DIOXIDE ATMOSPHERE

2018 ◽  
Vol 35 (2) ◽  
pp. 395-402
Author(s):  
Deborah C. de Andrade ◽  
Naíra S. de A. Maniçoba ◽  
Rony O. Sant'ana ◽  
Fedra A.V. Ferreira ◽  
Camila S. Figueiredo ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Strontium Carbonate ◽  
Solubility Data ◽  
Aqueous Mixtures ◽  
Carbon Dioxide Atmosphere
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