Transport phenomena in supercritical fluids

Krishnan, Anantha; Giridharan, M. G.

doi:10.2514/6.1995-2233

“…This phenomenon is accordant with ideal trend of the density of pure fluid at supercritical conditions. 14 3.3. Isobaric Thermal Expansion of RP-3.…”

Section: Resultsmentioning

confidence: 99%

Density Measurements of Endothermic Hydrocarbon Fuel at Sub- and Supercritical Conditions

Deng

¹

,

Zhang

²

,

Xu

³

et al. 2011

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The density of a typical endothermic hydrocarbon fuel (RP-3) at sub- and supercritical conditions is measured using a novel density measurement method which is based on mass conservation equation and can be applied to the density measurement of single phase flow including supercritical fluids. The measurement covers the temperature range of (295 to 796) K under pressures from (0.1 to 5) MPa. The uncertainty of the measurement is within ± 0.635 % according to error analysis. The results are fitted as polynomials to analyze deviations. For the 265 experimental data points, the average absolute deviation (AAD) and the maximum absolute deviation (MAD) are 0.539 % and 3.29 %, respectively. In addition, the isobaric thermal expansion α P is derived from the fitted values of density.

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“…Supercritical fluids have liquid-like densities, gaslike diffusivities and could be liquid or gas dependent on pressure and temperature change in the field. 20 The term "supercritical condition" -although often used -is not well-defined. refers to the region in the PT diagram where both P > P critical and T > T critical are satisfied.…”

Section: Supercritical Conditionsmentioning

confidence: 99%

Experimental and Simulation Studies of Sequestration of Supercritical Carbon Dioxide in Depleted Gas Reservoirs

Seo

¹

,

Mamora

²

2003

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Experimental, analytical, and simulation studies have been conducted to evaluate the feasibility of sequestering supercritical CO 2 in depleted gas reservoirs. The experimental runs involved the following steps. First, the 1 ft long by 1 in. diameter carbonate core is inserted into a viton Hassler sleeve and placed inside an aluminum coreholder that is then evacuated. Second, with or without connate water, the carbonate core is saturated with methane. Third, supercritical CO 2 is injected into the core with 300 psi overburden pressure. From the volume and composition of the produced gas measured by a wet test meter and a gas chromatograph, the recovery of methane at CO 2 breakthrough is determined. The core is scanned three times during an experimental run to determine core porosity and fluid saturation profile: at start of the run, at CO 2 breakthrough, and at the end of the run. Runs were made with various temperatures, 20°C (68°F) to 80°C (176°F), while the cell pressure is varied, from 500 psig (3.55 MPa) to 3000 psig (20.79 MPa) for each temperature.An analytical study of the experimental results has been also conducted to determine

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“…Supercritical fluids have liquid-like densities, gaslike diffusivities and could be liquid or gas dependent on pressure and temperature change in the field. 20 The term "supercritical condition" -although often used -is not well-defined. For instance, the term is not used or defined in standard references such as Katz Carbon dioxide has a critical temperature of 31°C (88°F) and a critical pressure of 7.38…”

Section: Supercritical Conditionsmentioning

confidence: 99%

“…Fig. 4 20. shows CT images of porosity profile calculated by porosity equation (Eq.4.2)with the aid of Voxelcalc image processing software.…”

mentioning

confidence: 99%

Experimental and Simulation Studies of Sequestration of Supercritical Carbon Dioxide in Depleted Gas Reservoirs

Seo

¹

,

Mamora

²

2005

Journal of Energy Resources Technology

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Experimental, analytical, and simulation studies have been conducted to evaluate the feasibility of sequestering supercritical CO 2 in depleted gas reservoirs. The experimental runs involved the following steps. First, the 1 ft long by 1 in. diameter carbonate core is inserted into a viton Hassler sleeve and placed inside an aluminum coreholder that is then evacuated. Second, with or without connate water, the carbonate core is saturated with methane. Third, supercritical CO 2 is injected into the core with 300 psi overburden pressure. From the volume and composition of the produced gas measured by a wet test meter and a gas chromatograph, the recovery of methane at CO 2 breakthrough is determined. The core is scanned three times during an experimental run to determine core porosity and fluid saturation profile: at start of the run, at CO 2 breakthrough, and at the end of the run. Runs were made with various temperatures, 20°C (68°F) to 80°C (176°F), while the cell pressure is varied, from 500 psig (3.55 MPa) to 3000 psig (20.79 MPa) for each temperature.An analytical study of the experimental results has been also conducted to determine iv the dispersion coefficient of CO 2 using the convection-dispersion equation. The dispersion coefficient of CO 2 in methane is found to be relatively low, 0.01-0.3 cm 2 /min.Based on experimental and analytical results, a 3D simulation model of one eighth of a 5-spot pattern was constructed to evaluate injection of supercritical CO 2 under typical field conditions. The depleted gas reservoir is repressurized by CO 2 injection from 500 psi to its initial pressure 3,045 psi. Simulation results for 400 bbl/d CO 2 injection may be summarized as follows. First, a large amount of CO 2 is sequestered: (i) about 1.2 million tons in 29 years (0 % initial water saturation) to 0.78 million tons in 19 years (35 % initial water saturation) for 40-acre pattern, (ii) about 4.8 million tons in 112 years (0 % initial water saturation) to 3.1 million tons in 73 years (35 % initial water saturation) for 80-acre pattern. Second, a significant amount of natural gas is also produced: (i) about 1.2 BSCF or 74 % remaining GIP (0 % initial water saturation) to 0.78 BSCF or 66 % remaining GIP (35 % initial water saturation) for 40-acre pattern, (ii) about 4.5 BSCF or 64 % remaining GIP (0 % initial water saturation) to 2.97 BSCF or 62 % remaining GIP (35 % initial water saturation) for 80-acre pattern. This produced gas revenue could help defray the cost of CO 2 sequestration. In short, CO 2 sequestration in depleted gas reservoirs appears to be a win-win technology. v DEDICATION My graduate studies at Texas A&M University would not have been possible without the support and understanding of my wife and son. This dissertation is dedicated to: my wife, Eunsun Lee, my son: Eric Hyobin Seo, and to my parents, my father Soobeom Seo, my mother Dongsil Cho, and my grandmother for their support, love, prayer, and guidance. vi ACKNOWLEDGEMENTS I would like to express my deepest appreciation to my research advis...

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Transport phenomena in supercritical fluids

Cited by 8 publications

References 4 publications

Density Measurements of Endothermic Hydrocarbon Fuel at Sub- and Supercritical Conditions

Density Measurements of Endothermic Hydrocarbon Fuel at Sub- and Supercritical Conditions

Experimental and Simulation Studies of Sequestration of Supercritical Carbon Dioxide in Depleted Gas Reservoirs

Experimental and Simulation Studies of Sequestration of Supercritical Carbon Dioxide in Depleted Gas Reservoirs

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