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gas-solubility
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Natural gas sweetening using ionic liquids, experiment and modeling
, Article CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference PRES, 25 August 2012 through 29 August 2012 ; August , 2012 ; Ghotbi, C ; Jalili, A. H ; Taghikhani, V ; Sharif University of Technology
2012
Abstract
A discussion covers the general descriptions and basic properties of ionic liquids (IL); main application areas, e.g., solvent replacement, purification of gases, homogenous and heterogeneous catalysis, biological reactions media, and removal of metal ions; and results of the research and works relating to gas solubility measurement and thermodynamic modeling of gas solubility with focus on acid gas solubility in IL. This is an abstract of a paper presented at the CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (Prague, Czech Republic...
Solubility of H2S in ionic liquids [hmim][PF6], [hmim][BF4], and [hmim][Tf2N]
, Article Journal of Chemical Thermodynamics ; Volume 41, Issue 9 , 2009 , Pages 1052-1055 ; 00219614 (ISSN) ; Ghotbi, C ; Hosseini Jenab, M ; Ahmadi, A. N ; Jalili, A. H ; Sharif University of Technology
2009
Abstract
The solubility of hydrogen sulphide in three ionic liquids, viz. 1-hexyl-3-methylilmidazolium hexafluorophosphate ([hmim][PF6]), 1-hexyl-3-methylimidazolium tetrafluoroborate ([hmim][BF4]), and 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([hmim][Tf2N]), at temperatures ranging from 303.15 K to 343.15 K and pressures up to 1.1 MPa were determined. The solubility values were correlated using the Krichevsky-Kasarnovsky equation and Henry's constants were obtained at different temperatures. Partial molar thermodynamic functions of solvation such as standard Gibbs free energy, enthalpy, and entropy were calculated from the solubility results. Comparison of the values obtained...
Experimental Study and Thermodynamic Modelling of the Solubilities of Acid Gases in Ionic Liquids
, Ph.D. Dissertation Sharif University of Technology ; Ghotbi, Cyrus (Supervisor) ; Jalili, Amir Hossein (Co-Advisor) ; Taghikhani, Vahid (Co-Advisor)
Abstract
New experimental results are presented for the solubility of carbon dioxide and hydrogen sulfide sulfide in six imidazolium-based ionic liquids included 1-octyl-3-methylimidazolium tetrafluoroborat ([C8mim][BF4]), 1-octyl-3-methylimidazolium hexafluorophosphate ([C8mim][PF6]), 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)-imide ([C8mim][Tf2N]), 1-octyl-3-methylimidazolium trifluoromethanesulfonate ([C8mim][TfO]), 1-hexyl-3-methylimidazolium trifluoromethanesulfonate ([C6mim][TfO]), 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([C4mim][TfO]) at temperatures range from 303.15 to 353.15 K and pressures up to about 2.5 MPa. The solubilities of the mixture of CO2/H2S in...
Gas Kick Detection and Modeling in Oil-based Mud
, M.Sc. Thesis Sharif University of Technology ; Jamshidi, Saeed (Supervisor)
Abstract
Rapid gas kick detection is an essential tool in safe well control operation. Gas kick can be defined as the uncontrolled release of gas from the formation into the wellbore due to insufficient hydrostatic pressure of the drilling mud. Delay in gas kick detection makes it challenging to control the well properly and may lead to blowout when gas reaches the surface, causing irreparable damage to life, property, and the environment. The usual method of identifying this phenomenon is through surface parameters such as increasing the return flow rate of drilling mud at the surface or increasing pit gain. The use of oil-based mud makes it more challenging to detect. Because, unlike water-based...
Solubility of H2S in 1-(2-hydroxyethyl)-3-methylimidazolium ionic liquids with different anions
, Article Fluid Phase Equilibria ; Volume 298, Issue 2 , November , 2010 , Pages 303-309 ; 03783812 (ISSN) ; Taghikhani, V ; Jalili, A. H ; Mehdizadeh, A ; Safekordi, A. A ; Sharif University of Technology
2010
Abstract
The solubility of hydrogen sulfide in a series of 1-(2-hydroxyethyl)-3-methylimidazolium ([HOemim]+)-based ionic liquids (ILs) containing different anions, viz. hexafluorophosphate ([PF6]-), trifluoromethanesulfonate ([OTf]-), and bis-(trifluoromethyl)sulfonylimide ([Tf2N]-) at temperatures ranging from 303.15 to 353.15K and pressures of up to about 1.8MPa was measured by a volumetric based static apparatus. The solubility data were correlated using two models: (1) the Krichevsky-Kasarnovsky equation and (2) the extended Henry's law combined with the Pitzer's virial expansion for the excess Gibbs energy. Henry's law constants (at zero pressure) in mole-fraction and molality scales were...
Solubility of CO2 in 1-(2-hydroxyethyl)-3-methylimidazolium ionic liquids with different anions
, Article Journal of Chemical Thermodynamics ; Volume 42, Issue 6 , June , 2010 , Pages 787-791 ; 00219614 (ISSN) ; Mehdizadeh, A ; Shokouhi, M ; Sakhaeinia, H ; Taghikhani, V ; Sharif University of Technology
2010
Abstract
The solubility of carbon dioxide in a series of 1-(2-hydroxyethyl)-3-methylimidazolium ([hemim]+) based ionic liquids (ILs) with different anions, viz. hexafluorophosphate ([PF6]-), trifluoromethanesulfonate ([OTf]-), and bis-(trifluoromethyl)sulfonylimide ([Tf2N]-) at temperatures ranging from 303.15 K to 353.15 K and pressures up to 1.3 MPa were determined. The solubility data were correlated using the Krichevsky-Kasarnovsky equation and Henry's law constants were obtained at different temperatures. Using the solubility data, the partial molar thermodynamic functions of solution such as Gibbs free energy, enthalpy, and entropy were calculated. Comparison showed that the solubility of CO2...
Study of the solubility of CO2, H2S and their mixture in the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate: Experimental and modelling
, Article Journal of Chemical Thermodynamics ; Volume 65 , 2013 , Pages 220-232 ; 00219614 (ISSN) ; Ghotbi, C ; Taghikhani, V ; Jalili, A. H ; Mehdizadeh, A ; Sharif University of Technology
2013
Abstract
New experimental results are presented for the solubility of carbon dioxide, hydrogen sulfide in the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate ([C8mim][PF6]) at temperatures range from (303.15 to 353.15) K and pressures up to about 2 MPa. The solubility of the mixture of CO2/H2S in [C8mim][PF6] under various feed compositions were also measured at temperatures of (303.15, 323.15 and 343.15) K and the pressure up to 1 MPa. The solubility of carbon dioxide and hydrogen sulfide increased with increasing pressure and decreased with increasing temperature and the solubility of H2S is about three times that of CO2 in the particular ionic liquid studied. The measured data were...