High pressure phase behavior of carbon dioxide in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and 1-butyl-3-methylimidazolium dicyanamide ionic liquids

Carvalho, Pedro J.; Álvarez, Víctor H.; Marrucho, Isabel M.; Aznar, Martı́n; Coutinho, João A. P.

doi:10.1016/j.supflu.2009.05.008

Cited by 172 publications

(122 citation statements)

References 48 publications

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“…The experimental data were taken from the literature Ren et al, 2010;Nwosu et al, 2009;Carvalho et al, 2009aCarvalho et al, , 2009bKroon et al, 2005;Liu et al, 2003;Ren and Scurto, 2009a;Shariati and Peters, 2003;Florusse et al, 2008) and the characteristics of these systems are shown in Table 2. The adjustable parameters, k ij and l ij , the %AARD and the range of experimental data utilized (expressed in pressure and liquid phase molar composition) are shown in Table 3 for all 17 binary systems analyzed here.…”

Section: Resultsmentioning

confidence: 99%

“…Larger deviations in the regions of high pressure were described in other works in the literature (Carvalho et al, 2009a;Nwosu et al, 2009;Ren et al, 2010) and, because of this behavior, the extrapolation of the model much beyond the data pressure region in which the interaction parameters were fit is not recommended.…”

Section: Brazilian Journal Of Chemical Engineeringmentioning

confidence: 93%

“…Phase equilibria in systems composed of ionic liquids + CO 2 were studied by several authors Ren et al, 2010;Nwosu et al, 2009;Carvalho et al, 2009aCarvalho et al, , 2009bKroon et al, 2005;Liu et al, 2003;Blanchard et al, 1999), but few of them have assessed the solubility in ionic liquids of other gases. The phase equilibria of different imidazolium ionic liquids with 1,1,1,2-tetrafluoroethane (R-134a) were studied by Scurto (2009a, 2009b); the authors emphasize the importance of understanding these systems for the separation of hydrofluorocarbon refrigerant gases and in other engineering applications.…”

Section: Brazilian Journal Of Chemical Engineeringmentioning

confidence: 99%

See 2 more Smart Citations

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

Freitas

Cunico

Aznar

et al. 2013

Braz. J. Chem. Eng.

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-Ionic liquids (IL) have been described as novel environmentally benign solvents because of their remarkable characteristics. Numerous applications of these solvents continue to grow at an exponential rate. In this work, high pressure vapor liquid equilibria for 17 different IL + gas binary systems were modeled at different temperatures with Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) equations of state, combined with the van der Waals mixing rule with two binary interaction parameters (vdW-2). The experimental data were taken from the literature. The optimum binary interaction parameters were estimated by minimization of an objective function based on the average absolute relative deviation of liquid and vapor phases, using the modified Simplex algorithm. The solubilities of all gases studied in this work decrease as the temperature increases and increase with increasing pressure. The correlated results were highly satisfactory, with average absolute relative deviations of 2.10% and 2.25% for PR-vdW-2 and SRK-vdW-2, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Brazilian Journal Of Chemical Engineeringmentioning

confidence: 93%

Section: Brazilian Journal Of Chemical Engineeringmentioning

confidence: 99%

See 1 more Smart Citation

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

Freitas

Cunico

Aznar

et al. 2013

Braz. J. Chem. Eng.

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“…The temperature-dependent part of the a parameter in the EOS for pure compounds is modeled by the following empirical formula [16][17][18][19][20][21][22][23][24][25][26][27]: (2) binary system, lines predicted by the present EOS calculations, symbols: •, VLE data [30] …”

Section: Binary Vlle Measurementsmentioning

confidence: 99%

Phase Behavior of N2O and CO2 in Room-Temperature Ionic Liquids [bmim][Tf2N], [bmim][BF4], [bmim][N(CN)2], [bmim][Ac], [eam][NO3], and [bmim][SCN]

et al. 2012

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The gas solubility of nitrous oxide (N 2 O) in room-temperature ionic liquids, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium acetate, 1-butyl-3-methylimidazolium thiocyanate, and ethylammonium nitrate has been measured at isothermal conditions from about (283 to 348) K using a gravimetric microbalance. The observed pressure-temperature composition (PTx) data have been analyzed by use of a generic Redlich-Kwong equationof-state (EOS) model, which has been successfully applied in our previous works. The interaction parameters have been determined using our measured vapor-liquid equilibrium data. Vapor-liquid-liquid equilibrium measurements have been made and validate EOS model predictions which suggest that these systems demonstrate Type III and Type V phase behavior, according to the classification of van Konynenburg and Scott. The global phase behavior of N 2 O has also been compared with both the measured data from this study and literature data for carbon dioxide (CO 2 ) in each ionic liquid and Henry's law constants are compared at room temperature (298.15 K).

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“…Thus, negligible vapour pressure, high thermal stability and low heat capacity of ionic liquids can be combined with fast absorption kinetics of alkanolamines in the amine functional ionic liquids [41]. CO 2 absorption capacity of the ionic liquids functionalized with suitable amino groups ("Task specific") are three times higher than room temperature ionic liquids (RTILs) [39,42]. Chemical and physical absorption increase with using task specific ionic liquid while working at high pressure.…”

Section: Ionic Liquidsmentioning

confidence: 99%

The Absorption Kinetics of CO2 into Ionic Liquid—CO2 Binding Organic Liquid and Hybrid Solvents

Orhan

Ume²,

Alper

2016

Green Energy and Technology

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Carbon dioxide (CO 2 ) capture is a global concern because of its effect on climate change especially as regards to global warming. Among greenhouse gases, CO 2 is the most abundant with high concentration released from post combustion processes into the atmosphere. For instance, the volume of CO 2 emission from thermal power plants, petroleum refineries, petrochemical plants, hydrogen and cement factories has become one of the top important global concerns nowadays. In order to capture post-combustion CO 2 and securely store it way or to produce useful products from it, it requires separation of CO 2 from flue gas stream. Industrially, it is generally accepted that the most appropriate method that can be applied commercially to capture CO 2 involves absorbing it with a reversible reaction from gas streams into aqueous amine especially monoethanolamine. Although, CO 2 -aqueous amine process is accepted as a mature technology but its absorption/desorption systems are the subject of several studies as the process is energy-intensive among other issues. In view of the shortfalls of CO 2 -aqueous amine systems and the greater societal concern to control the amount of CO 2 released to the environment from industrial sources to abate its effects, research for alternative viable solvent systems becomes of high interest to researchers as well as industrialists. Hence, this chapter is mainly to focus on highlighting and discussing relevant advanced solvent systems for CO 2 capture. Among the novel solvents or technology worthy of discussion here include use of organic solvents consisting of an amidine or a guanidine and a linear alcohol, such as 1-hexanol, instead of aqueous amines. In this case, CO 2 loaded solvent could be regenerated at 90-100°C which is much lower than the boiling point of the solvent and as a result, sufficient drop in energy requirements could be

show abstract

High pressure phase behavior of carbon dioxide in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and 1-butyl-3-methylimidazolium dicyanamide ionic liquids

Cited by 172 publications

References 48 publications

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

Phase Behavior of N2O and CO2 in Room-Temperature Ionic Liquids [bmim][Tf2N], [bmim][BF4], [bmim][N(CN)2], [bmim][Ac], [eam][NO3], and [bmim][SCN]

The Absorption Kinetics of CO2 into Ionic Liquid—CO2 Binding Organic Liquid and Hybrid Solvents

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