Mass transfer characteristics of gases in n-decane at elevated pressures and temperatures in agitated reactors

Chang, Min-Yan; Morsi, Badie I.

doi:10.1016/0300-9467(91)85005-g

Cited by 21 publications

(6 citation statements)

References 33 publications

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“…The multistep physical gas absorption method was used to obtain the equilibrium solubility and the volumetric mass-transfer coefficient values of CO 2 and N 2 in the three PFCs used. This experimental procedure used was similar to that reported by Chang, Chang et al, Chang and Morsi, , and Tekie et al It should also be mentioned that one batch of the PFCs was used in all experiments and no physical or chemical changes were observed. The experimental procedure followed is given below: A predetermined volume of liquid was charged at room temperature into the reactor. The reactor was closed, and the liquid was degassed using the vacuum pump to reach the saturation pressure of the liquid. The gas was charged into the preheater after vacuuming any remaining gas. The contents of the reactor and the preheater were heated to a desired temperature. The initial pressure ( P I,Ph ) and temperature ( T I,Ph ) of the preheater were recorded. The gas was charged into the reactor at the same temperature and at an initial predetermined pressure ( P I ). The reactor content was stirred at a given mixing speed until the thermodynamic equilibrium, characterized by a constant final pressure in the reactor ( P F ), was reached.…”

Section: Methodsmentioning

confidence: 76%

Novel Physical Solvents for Selective CO₂ Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

et al. 2008

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Three perfluorinated compounds (PFCs), PP10, PP11, and PP25, manufactured by F2 Chemicals Ltd., U.K., were investigated as physical solvents for selective CO2 capture from synthesis gas or syngas streams at elevated pressures and temperatures. The equilibrium solubility, the hydrodynamic, and the mass-transfer parameters of CO2 in the solvents were measured in a 4-L ZipperClave agitated reactor under wide ranges of operating conditions: pressures (6−30 bar), temperatures (300−500 K), mixing speeds (10−20 Hz), and liquid heights (0.14−0.22 m). The CO2 solubilities in the three solvents decreased with an increasing temperature at constant pressure and followed Henry’s law. The CO2 solubilities in PP25 were greater than those in PP10 and PP11. The volumetric liquid-side mass-transfer coefficients (k L a) of CO2 in the PFCs increased with mixing speed, pressure, and temperature. Also, the gas−liquid interfacial areas of CO2 in the three PFCs appeared to control the behavior of k L a. This study proved the thermal and chemical stability and the ability of the PFCs to selectively absorb CO2 at temperatures up to 500 K and pressures as high as 30 bar. A preliminary conceptual process design using PP25 for selective CO2 capture from hot-shifted gas with pressure-swing and pressure−temperature-swing regeneration options was devised [a temperature-swing option was also examined but is not reported here because it is outside the context of the present study, which involves a physical solvent process benchmark (Selexol) for which temperature-swing regeneration is not a viable option]. The pressure−temperature-swing option led to greater PP25 solvent loss but a more favorable (more negative) net enthalpy than the pressure-swing option. However, for either regeneration option to be economically viable, the PP25 solvent must be completely recovered from the process.

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Section: Methodsmentioning

confidence: 76%

Novel Physical Solvents for Selective CO₂ Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

et al. 2008

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“…7 illustrates that the gas-liquid interfacial area a values increase remarkably with the increase of pressure. These effects can be explained as follows according to Chang and Morsi [12]. The gas solubility in the liquid phase increases with pressure, it results in decreasing both the liquid surface tension and liquid viscosity.…”

Section: Influence Of Pressurementioning

confidence: 99%

Mass Transfer Characteristics of Syngas Components in Slurry System at Industrial Conditions

Wei-guo

Wang

2001

Chem. Eng. Technol.

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“…In physical terms, the above equation implies that the impeller tip velocity must exceed the gas rising velocity a certain number of times so that all big gas bubbles supplied can be broken up into small bubbles. Equation (53) has been confirmed experimentally by Mehta and Sharma [79], but it has been criticised by DeGraaf et al [95] for not taking into account the effect of impeller position (depth). DeGraaf et al [95] also claim that Eq.…”

Section: Axial-dispersion Impellersmentioning

confidence: 89%

“…Other investigators [52][53][54][55][56] used the physical absorption method combined with the Peng-Robinson equation of state [57] to evaluate k^a for the mass transfer of several gases (not oxygen) in organic and aqueous solutions at pressures up to 5.5 MPa (54.3 atm) and temperatures up to 428 K (155°C).…”

Section: Fin-mentioning

confidence: 99%

Gas–Liquid Oxygen Mass-transfer; from Fundamentals to Applications in Hydrometallurgical Systems

Filippou

Cheng

Demopoulos

2000

Mineral Processing and Extractive Metallurgy Review

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Oxygen gas is used as a reactant in many hydrometallurgical processes. However, oxygen is sparingly soluble in aqueous electrolyte solutions, and the driving force for its masstransfer from the gas to the aqueous phase is also very low. Hence, the mass-transfer of oxygen depends significantly on the interfacial area between the gas and the liquid phase, which in turn depends on the mixing conditions inside the reactor. A change in the solution composition or the presence of solids can further alter the rate of oxygen masstransfer. All such phenomena related to the gas-liquid oxygen mass-transfer in hydrometallurgical unit operations are critically reviewed in the present article -from the basic thermodynamics and kinetics of oxygen dissolution in aqueous solutions to the most recent advances in oxygen mass-transfer systems.

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Mass transfer characteristics of gases in n-decane at elevated pressures and temperatures in agitated reactors

Cited by 21 publications

References 33 publications

Novel Physical Solvents for Selective CO₂ Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

Novel Physical Solvents for Selective CO₂ Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

Mass Transfer Characteristics of Syngas Components in Slurry System at Industrial Conditions

Gas–Liquid Oxygen Mass-transfer; from Fundamentals to Applications in Hydrometallurgical Systems

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Mass transfer characteristics of gases in n-decane at elevated pressures and temperatures in agitated reactors

Cited by 21 publications

References 33 publications

Novel Physical Solvents for Selective CO2 Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

Novel Physical Solvents for Selective CO2 Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

Mass Transfer Characteristics of Syngas Components in Slurry System at Industrial Conditions

Gas–Liquid Oxygen Mass-transfer; from Fundamentals to Applications in Hydrometallurgical Systems

Contact Info

Product

Resources

About

Novel Physical Solvents for Selective CO₂ Capture from Fuel Gas Streams at Elevated Pressures and Temperatures

Novel Physical Solvents for Selective CO₂ Capture from Fuel Gas Streams at Elevated Pressures and Temperatures