Equilibria between solid, liquid and gaseous phases at low temperatures. The system carbon dioxide + ethane + ethylene

Clark, Andrew M.; Din, Fasih Ud

doi:10.1039/df9531500202

Cited by 19 publications

(7 citation statements)

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“…The Rackett method is used to give an approximate molar volume for the solids for which we do not have experimental data. (Brew , 1977;Kuebler and McKinley, 1975), C 2 H 2 (Neumann and Mann, 1969), C 4 H 6 (Preston et al, 1971), C 6 H 6 (von Szalghary, 1972Luks et al, 1981;Kuebler and McKinley, 1995;Malaska and Hodyss, 2014) and CO 2 (Clark and Din, 1953;Davis et al, 1962;Cheung and Zander , 1968;Preston et al, 1971) Table 1: Production rates (in molecules/cm 2 /s) of simple solid organics in Titan's atmosphere derived from several photochemical models. Not reported here is the production rate of tholins, estimated by Cabane et al (1992), Rannou et al (2003) and Krasnopolsky (2009) to be between 0.2 and 7 kg/cm 2 /GEyr (Giga Earth year).…”

Section: C2 Titan's Solids Molar Volumesmentioning

confidence: 99%

“…The darkest curves represent X i,sat evaluated by Equation 24 with the Z RA parameter. Diamonds are experimental values collected for C 4 H 10(Brew , 1977;Kuebler and McKinley, 1975), C 2 H 2(Neumann and Mann, 1969), C 4 H 6(Preston et al, 1971), C 6 H 6(von Szalghary, 1972;Luks et al, 1981;Kuebler and McKinley, 1995;Malaska and Hodyss, 2014) and CO 2(Clark and Din, 1953;Davis et al, 1962;Cheung and Zander , 1968;Preston et al, 1971) in the corresponding liquids. Dashed lines are empirical power fits of the experimental points (with R 2 > 0.98).…”

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confidence: 99%

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Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

et al. 2015

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Titan's polar surface is dotted with hundreds of lacustrine depressions. Based on the hypothesis that they are karstic in origin, we aim at determining the efficiency of surface dissolution as a landshaping process on Titan, in a comparative planetology perspective with the Earth as reference. Our approach is based on the calculation of solutional denudation rates and allow inference of formation timescales for topographic depressions developed by chemical erosion on both planetary bodies. The model depends on the solubility of solids in liquids, the density of solids and liquids, and the average annual net rainfall rates. We compute and compare the denudation rates of pure solid organics in liquid hydrocarbons and of minerals in liquid water over Titan and Earth timescales. We then investigate the denudation rates of a superficial organic layer in liquid methane over one Titan year. At this timescale, such a layer on Titan would behave like salts or carbonates on Earth depending on its composition, which means that dissolution processes would likely occur, but would be 30 times slower on Titan compared to the Earth due to the seasonality of precipitation. Assuming an average depth of 100 m for Titan's lacustrine depressions, these could have developed in a few tens of millions of years at polar latitudes higher than 70 • N and S, and a few hundreds of million years at lower polar latitudes. The ages determined are consistent with the youth of the surface (< 1 Gyr) and the repartition of dissolution-related landforms on Titan.

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Section: C2 Titan's Solids Molar Volumesmentioning

confidence: 99%

mentioning

confidence: 99%

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

et al. 2015

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“…To calculate values of the Wilson coefficients, suitable values for pure component properties are entered into equations (18) to (20). The resulting parameters are then substituted into equation (17) to calculate the pure component interaction energies.…”

Section: Discussionmentioning

confidence: 99%

“…Studies have been conducted of many different binary mixtures between CO 2 and other substances, with many of these systems exhibiting low temperature eutectics [17,18]. Eggeman and Chafin [19] describe the formation of solid CO 2 in cryogenic equipment and the different binary solutions used in industry to avoid this problem.…”

Section: Choice Of Absorbentmentioning

confidence: 99%

Simultaneous removal of CO₂, SO₂, and NO_x from flue gas by liquid phase dehumidification at cryogenic temperatures and low pressure

McGlashan

Marquis

2008

Proceedings of the Institution of Mechanical Engineers, Part A:

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Abstract:The current paper presents a new process for postcombustion carbon capture. An historical survey of the cryogenic techniques used in the chemical industry for the removal of acid vapours is given, with particular emphasis on two Ryan -Holmes-based processes. The paper suggests that these two processes have the potential to achieve CO 2 separation from flue gas with high second law efficiency. A further variation on these processes is then proposed enabling the simultaneous capture of CO 2 , SO 2 , and NO x from flue gas produced in conventional or combined cycle power stations, burning pulverized coal or heavy bunker fuels. The proposed process absorbs these vapours by dehumidification using a cooled liquid absorbent, at low pressure (close to atmospheric) and cryogenic temperatures. A feature of the process is the use of direct contact heat transfer to perform the major cooling and heating operations thus reducing the plant size and cost while improving efficiency.The paper starts with a discussion of the most suitable absorbent for the process; liquid SO 2 is suggested and a simplified analysis of an absorption column is conducted using the technique developed by Souders and Brown. This analysis shows that with only four theoretical stages and an acceptable liquid/gas ratio of two, SO 2 is able to absorb CO 2 and leave a residual concentration of CO 2 in the flue gas equivalent to 90 per cent carbon capture.The final section of the paper describes the use of dilute H 2 SO 4 as a precooling stream to reduce the temperature of the flue gas prior to it entering the CO 2 scrubbing section. It is proposed to produce the necessary H 2 SO 4 from the constituents of the flue gas using similar reactions to those of the 'lead-chamber process'. The H 2 SO 4 stream is also used to reheat the flue gas before it is passed to the chimney. It is shown that an important attribute of the H 2 SO 4 stream is its role as a 'lean-oil', reducing SO 2 emissions from the power station to well below the levels required by future legislation.

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“…In the temperature range below the first discontinuity the author states that the decomposition is represented solely by the reaction 2NaHC03(s) -Na2C03(s) + H20(g) + C02(g) (1) and as such the phase rule dictates that the system contains only one degree of freedom.…”

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confidence: 99%

Solid hydrocarbon solubility in liquid methane-ethane mixtures along three-phase solid-liquid-vapor loci

Tiffin¹,

Kohn²,

Luks³

1979

J. Chem. Eng. Data

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Three ternary systems, methane-ethane-n-octane, methane-ethane-benzene, and methane-ethane-cyclohexane, are Investigated along their three-phase S-L-V loci. The dramatic solubility enhancement of these solid hydrocarbons In liquid methane due to the presence of ethane Is documented and presented graphically for a wide range of ethane concentration levels. Pressure, temperature, liquid-phase molar volume, and liquid-phase composition are tabulated In raw data form.

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Equilibria between solid, liquid and gaseous phases at low temperatures. The system carbon dioxide + ethane + ethylene

Cited by 19 publications

References 0 publications

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

Simultaneous removal of CO₂, SO₂, and NO_x from flue gas by liquid phase dehumidification at cryogenic temperatures and low pressure

Solid hydrocarbon solubility in liquid methane-ethane mixtures along three-phase solid-liquid-vapor loci

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Equilibria between solid, liquid and gaseous phases at low temperatures. The system carbon dioxide + ethane + ethylene

Cited by 19 publications

References 0 publications

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

Simultaneous removal of CO2, SO2, and NOx from flue gas by liquid phase dehumidification at cryogenic temperatures and low pressure

Solid hydrocarbon solubility in liquid methane-ethane mixtures along three-phase solid-liquid-vapor loci

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Simultaneous removal of CO₂, SO₂, and NO_x from flue gas by liquid phase dehumidification at cryogenic temperatures and low pressure