Co-solvent concentration influence of two- and three-component systems on the high pressure cloud-point behavior for the poly(vinyl stearate) under supercritical CO2

2020 ◽  
Vol 90 ◽  
pp. 76-84
Author(s):  
Hun-Soo Byun
Keyword(s):  
High Pressure ◽  
Cloud Point ◽  
Supercritical Co2 ◽  
Solvent Concentration ◽  
Component Systems

Co-solvent concentration impact on the cloud point behavior of 2- and 3-ingredient systems of the poly(tridecyl methacrylate) in supercritical CO2

2022 ◽  
Author(s):  
Pradnya NP Ghoderao ◽  
Duraisami Dhamodharan ◽  
Hun-Soo Byun
Keyword(s):  
High Pressure ◽  
Cloud Point ◽  
Dimethyl Ether ◽  
Supercritical Co2 ◽  
Solvent Concentration ◽  
Variable Volume ◽  
Point Data

Cloud point data of the 2- and 3-ingredient poly(tridecyl methacrylate) [P(TDMA)] mixture in supercritical CO2 and dimethyl ether (DME) have been obtained experimentally with the variable volume-view cell at a high pressure.

Influences of dynamic entrainer-blended supercritical CO2 fluid exposure on high-pressure methane adsorption on coals

2019 ◽  
Vol 66 ◽  
pp. 180-191 ◽  
Author(s):  
Dengfeng Zhang ◽  
Chao Li ◽  
Jin Zhang ◽  
Zengmin Lun ◽  
Shuaiqiu Jia ◽  
...  
Keyword(s):  
High Pressure ◽  
Supercritical Co2 ◽  
Methane Adsorption ◽  
Supercritical Co2 Fluid

scholarly journals High-pressure cloud point data for the system glycerol + olive oil + n-butane + AOT

2008 ◽  
Vol 25 (3) ◽  
pp. 563-570 ◽  
Author(s):  
J. P. Bender ◽  
A. Junges ◽  
E. Franceschi ◽  
F. C. Corazza ◽  
C. Dariva ◽  
...  
Keyword(s):  
High Pressure ◽  
Olive Oil ◽  
Cloud Point ◽  
Point Data

Numerical Method for Simulating High Pressure CO2 Flows With Nonequilibrium Condensation

2018 ◽  
Author(s):  
Takashi Furusawa ◽  
Hironori Miyazawa ◽  
Shota Moriguchi ◽  
Satoru Yamamoto
Keyword(s):  
High Pressure ◽  
Numerical Method ◽  
Supercritical Co2 ◽  
Compressible Flows ◽  
Ideal Gas ◽  
Experimental Result ◽  
High Mass ◽  
Real Gas ◽  
High Pressure Co2 ◽  
Nonequilibrium Condensation

A numerical method for compressible flows with nonequilibrium condensation is reconstructed for simulating supercritical CO2 flows with nonequilibrium condensation under high pressure conditions. Thermophysical properties are interpolated from pressure-temperature look-up tables and density-internal energy look-up tables, which are generated using the polynomial equations in REFPROP. We employ the high pressure nonequilibrium condensation model in which the critical radius of a liquid droplet is modified by considering non-ideal gas. We simulate high pressure CO2 flows through a Laval nozzle, which was experimentally investigated by Lettieri et al. High-pressure CO2 passes through the nozzle, leading to a decrease in its pressure and temperature. It reaches the supercooled condition near the throat. Nucleation and the subsequent growth of droplets lead to an increase in the condensate mass fraction in the diverging area. The proposed method for real gas reproduced the peak of pressure distribution owing to the release of latent heat, whereas the numerical result assuming ideal gas is different from the experimental result. The nucleation region obtained using the present method is earlier and narrower than that in the case of ideal gas. The early and rapid nucleation leads to the high mass condensate rate at the outlet. These results show that considering the real gas effect and nonequilibrium condensation is crucial for developing the impeller of a compressor for the supercritical CO2 Brayton cycle.

scholarly journals Montagem, testes operacionais e validação de uma unidade laboratorial para extração de compostos de matrizes vegetais utilizando fluidos pressurizados ou supercríticos como solventes

2020 ◽  
Vol 42 ◽  
pp. 22
Author(s):  
Renan De Oliveira Ferreira ◽  
Estêvão Santos Laureano da Cunha ◽  
Iuri Prass Bitencourte ◽  
Jefferson Fagundes da Silva ◽  
Jéssica Rocha de Morais ◽  
...  
Keyword(s):  
High Pressure ◽  
Supercritical Co2 ◽  
Standard Operating Procedure ◽  
Second Step ◽  
Liquefied Petroleum Gas ◽  
The Third ◽  
Standard Operating ◽  
Solvent Residues ◽  
Operational Validation ◽  
Validation Tests

Extractions of compounds still use traditional methods, leaving solvent residues in the extracts. An alternative is the use of high-pressure solvents such as supercritical CO2 and pressurized liquefied petroleum gas (LPG). Based on this context, the objective of this work was to assemble an equipment for high-pressure extractions using CO2 or pressurized LPG as solvent. The project and assembling were divided into 3 steps. In the first step, the equipment was designed. Also, aluminum bars, pipes, valves, pressure gauges, thermostatic baths, a pump for solvent pressurization, a digital temperature controller, a band heater and a reactor with filters were purchased. In the second step, some adaptations were done in the structure and its components for improving the operation. In the third step, the equipment was effectively assembled. Thereafter, operational validation tests were performed in order to verify the operation and the necessity of adjustments. In addition, a Standard Operating Procedure was created in order to standardize the next operations. The equipment is suitable for the extraction of bioactive compounds from different plant matrices, providing satisfactory extraction yields.

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