Natural gas purification using supported ionic liquid membrane

Althuluth, Mamoun; Overbeek, J.P.; Wees, Hans J. van; Zubeir, Lawien F.; Haije, W.G.; Berrouk, Abdallah S.; Peters, Cor J.; Kroon, Maaike C.

doi:10.1016/j.memsci.2015.02.033

Cited by 54 publications

(27 citation statements)

References 29 publications

(47 reference statements)

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“…Previous publications on SILMs confirm that the selectivity is solubility-dominated instead of diffusion-dominated [ 9 ]. The solubilities of CO 2 , CH 4 , C 2 H 6 , N 2 and O 2 in several aprotic ILs have been studied extensively [ 12 , 13 , 14 , 15 ]. On the contrary, the thermodynamic properties of protic ionic liquids, i.e., those comprising proton-donor and proton-acceptor centers in their molecules, have been investigated in lower extent [ 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Gas-Permeation Properties of Proton-Conducting Membranes Based on Protic Imidazolium Ionic Liquids: Application in Natural Gas Processing

et al. 2018

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This experimental study explores the potential of supported ionic liquid membranes (SILMs) based on protic imidazolium ionic liquids (ILs) and randomly nanoporous polybenzimidazole (PBI) supports for CH4/N2 separation. In particular, three classes of SILMs have been prepared by the infiltration of porous PBI membranes with different protic moieties: 1-H-3-methylimidazolium bis (trifluoromethane sulfonyl)imide; 1-H-3-vinylimidazolium bis(trifluoromethane sulfonyl)imide followed by in situ ultraviolet (UV) polymerization to poly[1-(3H-imidazolium)ethylene] bis(trifluoromethanesulfonyl)imide. The polymerization process has been monitored by Fourier transform infrared (FTIR) spectroscopy and the concentration of the protic entities in the SILMs has been evaluated by thermogravimetric analysis (TGA). Single gas permeability values of N2 and CH4 at 313 K, 333 K and 363 K were obtained from a series of experiments conducted in a batch gas permeance system. The results obtained were assessed in terms of the preferential cavity formation and favorable solvation of methane in the apolar domains of the protic ionic network. The most attractive behavior exhibited poly[1-(3H-imidazolium)ethylene]bis(trifluoromethanesulfonyl)imide polymeric ionic liquid (PIL) cross-linked with 1% divinylbenzene supported membranes, showing stable performance when increasing the upstream pressure. The CH4/N2 permselectivity value of 2.1 with CH4 permeability of 156 Barrer at 363 K suggests that the transport mechanism of the as-prepared SILMs is solubility-dominated.

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Section: Introductionmentioning

confidence: 99%

Exploring the Gas-Permeation Properties of Proton-Conducting Membranes Based on Protic Imidazolium Ionic Liquids: Application in Natural Gas Processing

et al. 2018

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“…11 An important drawback in case of ILs is their high viscosity. At present, several supported ionic liquid membranes (SILMs) are proposed for CO 2 separation; [12][13][14] however, the mechanical stability of SILMs is still a severe issue. Fortunately, it is reported that the high viscosity of many ILs would help to prevent liquid penetrating the support.…”

Section: Introductionmentioning

confidence: 99%

Gas solubility in long‐chain imidazolium‐based ionic liquids

2017

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Significance The gas solubility in 1‐dodecyl‐3‐methylimidazolium [C12MIM] based ionic liquids (ILs) was measured at temperatures (333.2, 353.2, and 373.2) K and pressures up to 60 bar for the first time. The popular UNIFAC‐Lei model was successfully extended to long‐chain imidazolium‐based IL and gas (CO2, CO, and H2) systems. The free volume theory was used to explain the gas solubility and selectivity in imidazolium‐based ILs by calculating the fractional free volume and free volume by the COSMO‐RS model. Furthermore, the excess enthalpy of gas‐IL system was concerned to provide new insights into temperature dependency of gas (CO2, CO, and H2) solubility in ILs. The experimental data, calculation, and theoretical analysis presented in this work are important in gas separations with ILs or supported ionic liquid membranes. © 2017 American Institute of Chemical Engineers AIChE J, 63: 1792–1798, 2017

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“…The authors have concluded with the expectation of using the above blended solvents for natural gas and PCC‐based CO 2 removal applications. Althuth et al have investigated the natural gas purification by supported IL membranes (1‐ethyl‐3‐methyllimidazolium tris‐trifluorophosphate impregnated in the γ ‐alumina layer of tubular porous asymmetric membranes). The authors have investigated the permeability of various components of natural gas (CO 2 /CH 4 /C 2 H 6 /C 3 H 8 ) through the IL membrane.…”

Section: Process Modelingmentioning

confidence: 99%

Mathematical Modeling, Parametric Estimation, and Operational Control for Natural Gas Sweetening Processes

Selvan

Panda

2017

ChemBioEng Reviews

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As a result of the increased energy demand and the required environmental compliance, purification of natural gas (NG) need to be processed through more efficient technologies. Most the NG sources contain H2S and CO2 as acidic contaminants causing corrosion, reduction in the calorific value of the fuel, and toxicity. Removal of these gases (gas sweetening) is mostly performed in a reactive absorber followed by a stripper for solvents regeneration. Amine solvents are very suitable due to their natural affinity towards the acid gases. In the setting‐up of newer plants or retrofitting of old units in existing plants to improve the efficiency of the sweetening process, modeling, optimization, and safer operational control of the process have drawn the attention of many researchers. The development of better models must take into account the synthesis and implementation of proper control strategies. Rate‐based, equilibrium, and kinetic models supported by thermodynamic properties of the components have been discussed here and experiments carried out to identify new process models have also been presented.

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Natural gas purification using supported ionic liquid membrane

Cited by 54 publications

References 29 publications

Exploring the Gas-Permeation Properties of Proton-Conducting Membranes Based on Protic Imidazolium Ionic Liquids: Application in Natural Gas Processing

Exploring the Gas-Permeation Properties of Proton-Conducting Membranes Based on Protic Imidazolium Ionic Liquids: Application in Natural Gas Processing

Gas solubility in long‐chain imidazolium‐based ionic liquids

Mathematical Modeling, Parametric Estimation, and Operational Control for Natural Gas Sweetening Processes

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