Solubility prediction of low volatile solutes in supercritical carbon dioxide in the absence of saturation pressure data

2007 ◽  
Vol 40 (2) ◽  
pp. 170-175
Author(s):  
Masturah Markom ◽  
Teoh Wen Hui
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Saturation Pressure ◽  
Pressure Data ◽  
Solubility Prediction ◽  
Supercritical Carbon

Controlled foaming of polycarbonate/polymethyl methacrylate thin film with supercritical carbon dioxide

2016 ◽  
Vol 30 (12) ◽  
pp. 1713-1727 ◽  
Author(s):  
Yuanxiang Luo ◽  
Yajun Ding ◽  
Changchun Wang ◽  
Linghua Tan ◽  
Sanjiu Ying
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Polymethyl Methacrylate ◽  
Saturation Pressure ◽  
Saturation Temperature ◽  
Mean Diameter ◽  
The Mean ◽  
Foaming Temperature ◽  
Supercritical Carbon ◽  
Foaming Time

The polycarbonate (PC)/polymethyl methacrylate (PMMA) (10/90) blends with microcellular foams were prepared by the two-step process using supercritical carbon dioxide as physical foaming agent. The effects of saturation temperature, saturation pressure, foaming temperature, and foaming time on the cell morphology structure were investigated by scanning electron microscopy. The results indicated that the mean diameter of cells in foamed PC/PMMA films decreased with the increment of saturation temperature and saturation pressure but increased with the increment of the foaming time. Moreover, the mean diameter of cells decreased first, but then increased with the increment of the foaming temperature. The cell density ( Nc) increased with the increment of saturation temperature and saturation pressure but decreased with the increment of the foaming time. However, the Nc increased first but then decreased with the increment of the foaming temperature.

Connectionist approaches for solubility prediction of n-alkanes in supercritical carbon dioxide

2016 ◽  
Vol 29 (1) ◽  
pp. 295-305 ◽  
Author(s):  
Amin Daryasafar ◽  
Navid Daryasafar ◽  
Mohammad Madani ◽  
Mahdi Kalantari Meybodi ◽  
Mohammad Joukar
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Solubility Prediction ◽  
Supercritical Carbon

Research on the Effect of Supercritical Carbon Dioxide on the Properties of Super Heavy Oil

2011 ◽  
Vol 347-353 ◽  
pp. 1689-1695
Author(s):  
Zhao Min Li ◽  
Wei Liu ◽  
Song Yan Li ◽  
Jing Li ◽  
Bin Fei Li
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Heavy Oil ◽  
Saturation Pressure ◽  
Oil Field ◽  
Viscosity Reduction ◽  
Oil Reservoir ◽  
Volume Factor ◽  
Heavy Oil Reservoir ◽  
Supercritical Carbon

Carbon dioxide flooding is an important way to exploit heavy oil reservoir. Considering the Zheng411 super heavy oil reservoir in Shengli Oil Field, the solubility of supercritical carbon dioxide in super heavy oil, and the effect of supercritical carbon dioxide on the volume factor, viscosity, component content and oil/water emulsification of super heavy oil are researched. The result shows: the solubility of carbon dioxide in super heavy oil increases with the increasing pressure, but the increasing extent declines gradually, when the pressure is below 28MPa, the solubility of carbon dioxide decreases with the rising temperature under the same saturation pressure; the volume factor increases linearly with the increase of supercritical carbon dioxide solubility; under the condition of unsaturation, the supercritical carbon dioxide is able to reduce the density of super heavy oil substantially, whereas it has little impact on the chemical properties of oil; Demulsification and visbreaking can be realized through dissolving supercritical carbon dioxide in super heavy oil that contains water, and the viscosity reduction capacity of carbon dioxide is hardly affected by water.

scholarly journals Prediction of supercritical carbon dioxide solubility in polymers based on hybrid artificial intelligence method integrated with the diffusion theory

RSC Advances ◽  
2017 ◽  
Vol 7 (78) ◽  
pp. 49817-49827 ◽  
Author(s):  
Li Mengshan ◽  
Liu Liang ◽  
Huang Xingyuan ◽  
Liu Hesheng ◽  
Chen Bingsheng ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Prediction Model ◽  
Diffusion Theory ◽  
Solubility Prediction ◽  
Model Based ◽  
Hybrid Artificial Intelligence ◽  
Supercritical Carbon

A solubility prediction model based on a hybrid artificial intelligence method integrated with diffusion theory is proposed.

scholarly journals Solubility Modelling pf Butterfly Wing Leaves (Christia Vespertilionis) in Supercritical Carbon Dioxide

2018 ◽  
Vol 7 (3.26) ◽  
pp. 9
Author(s):  
Izni A. A. Hamid ◽  
Norhuda Ismail ◽  
Ana N. Mustapa ◽  
Norazah A. Rahman
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Solubility Prediction ◽  
Anti Cancer ◽  
Empirical Density ◽  
Best Fitting ◽  
Pharmaceutical Industries ◽  
Green Technique ◽  
Supercritical Carbon

Medicinal herb Christia vespertilionis oil has been claimed to possess anti-cancer and anti-plasmodial properties and show interest in food and pharmaceutical industries. Being an important alternative medicine plant, solubility data of Christia vespertilionis oil is demanded in order to understand the separation process and is crucial for designing purposes. In this work, extraction and determination of the oil’s solubility were carried out using a green technique of supercritical carbon dioxide at a temperature range of 40 to 60℃ and 276 to 414 bar of pressure. The results demonstrated that the highest solubility was obtained at the highest temperature and pressure of 60℃ and 414 bar, respectively. For solubility prediction, experimental data were modelled using four empirical density-based models: Chrastil, del Valle and Aguilera, Adachi and Lu, and Sparks et al. models. In general, all the models were able to predict the solubility of Christia vespertilionis oil in supercritical carbon dioxide. The best fitting showed that Adachi and Lu model gave the best correlation with the lowest %AARD value of 1.61%.  

Foaming behavior of the fluorinated ethylene propylene copolymer assisted with supercritical carbon dioxide

2020 ◽  
pp. 0021955X2096400
Author(s):  
Zi-yin Jiang ◽  
Yun-fei Zhang ◽  
Chang-jing Gong ◽  
Zhen Yao ◽  
Abhinaya Shukla ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Saturation Pressure ◽  
Nucleating Agent ◽  
Expansion Ratio ◽  
Cell Diameter ◽  
Ethylene Propylene ◽  
Foaming Behavior ◽  
Fluorinated Ethylene Propylene ◽  
Supercritical Carbon

Foaming behavior of the fluorinated ethylene propylene copolymer (FEP) and its composites assisted with supercritical carbon dioxide (scCO2) as the blowing agent were investigated. The batch foaming process was applied at temperature ranging from 250°C to 265°C and pressure ranging between 12 MPa and 24 MPa. The optimal foaming temperature and saturation pressure were obtained for both pure FEP and FEP composites with 1 wt% different-sized BaTiO3 as nucleating agent. The cell diameter of pure FEP foam ranging from 80–140 µm was observed while the cell diameter decreased to 20–40 µm after adding BaTiO3 particles. The cell density of foamed FEP with BaTiO3 increased significantly from 106 to 108 cells/cm3 and the expansion ratio ranged between 4.0 and 5.5. Moreover, a decrease in an abnormal phenomenon that expansion ratio for the pure FEP foam was observed as the saturation pressure increased. This unexpected phenomenon can be explained by the relationship between foaming and crystallization coupling processes.

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