Evaluation of ionic liquids as absorbents for ammonia absorption refrigeration cycles using COSMO-based process simulations

Ruiz, Elia; Ferro, Víctor R.; Riva, Juan de; Palomar, José

doi:10.1016/j.apenergy.2014.02.061

Cited by 96 publications

(63 citation statements)

References 54 publications

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“…The performance of COSMO-based/Aspen Plus (Aspen HYSYS) methodology to describe the thermodynamic behavior of multiphasic systems involving ILs and conventional chemical compounds has been evaluated in previous works 8,9,25,[30][31][32][33][34] . The obtained predictability of COSMObased/Aspen Plus (Aspen HYSYS) approach for phase equilibrium data of IL mixtures is illustrated in Table 5, including gas-liquid (GLE), vapor-liquid (VLE) and liquid-liquid (LLE) cases.…”

Section: Iluam01 Database Validationmentioning

confidence: 99%

“…This solution has been addressed by several research groups in different application fields and using rather dissimilar strategies 7,[12][13][14][15][16][17][18][19] . In particular, our group has been worked 20 in the integration of the molecular modeling and the process simulation via the COSMO-based 21,22 In the last five years, we have successfully applied COSMO-based/Aspen Plus (Aspen HYSYS) procedure to the design and analysis of new different processes using ILs: absorption of toluene in packed/tray columns 30 , absorption refrigeration cycles 31 , aromatic-aliphatic separation by liquidliquid extraction 25,32,33 , extractive distillation 34 and CO 2 capture by physical absorption 9 . In addition, the technical and economic impact of the solvent regeneration by distillation 8 in different processes was evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the technical and economic impact of the solvent regeneration by distillation 8 in different processes was evaluated. From these works, three main results should be highlighted: i) COSMO-based/Aspen Plus (Aspen HYSYS) approach provides reasonably property predictions for ILs and their mixture with conventional chemical compounds 8,25,31,32 ; ii) the competitiveness of the equipment designs reached 34 compared to those supported by regressive thermodynamic models like NRTL (which involves a previous fitting of the model parameters); and iii) the high capacity of the procedure to deal with multicomponent mixtures and complex process models 9,32,33 .…”

Section: Introductionmentioning

confidence: 99%

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Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property Methods

Ferro

Moya

Santiago

et al. 2018

Ind. Eng. Chem. Res.

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Section: Iluam01 Database Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property Methods

Ferro

Moya

Santiago

et al. 2018

Ind. Eng. Chem. Res.

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“…Among all ionic liquids presented in this paper 4 ] shows high absorption capacity, it is necessary to study its other properties (e.g. viscosity) to have deeper understanding about its feasibility to be a suitable absorbent for ammonia refrigerant.…”

Section: Discussionmentioning

confidence: 99%

“…The use of ionic liquid (IL) as an alternative to water as absorbent in the absorption refrigeration cycle gives some advantages such as elimination of the rectification process in ammonia/water system. The use of IL as absorbent with ammonia as refrigerant in the absorption refrigeration cycle has been discussed by researchers [1][2][3][4][5][6][7]. According to them, one of the main advantages in comparison with a conventional ammonia/water absorption refrigeration cycle is that the ammonia/IL absorption refrigeration system may not require the costly rectifier unit needed for traditional ammonia/water system due to there being practically no vapour pressure for the absorbent.…”

Section: Introductionmentioning

confidence: 99%

Absorption Capacity of Ammonia into Ionic Liquids for Absorption Refrigeration Applications

Ariyadi

Coronas

2016

J. Phys.: Conf. Ser.

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Abstract. In this paper ionic liquids are proposed as a novel absorbent for absorption refrigeration application with ammonia as refrigerant. The main objective of this work is to develop a measurement setup to study the absorption capacity of the ammonia vapour in ionic liquids in a pool type absorber. This investigation is essential in order to identify the most suitable ionic liquid as an absorbent for ammonia refrigerant. . The absorption processes are observed within 20 minutes in each experiment at different temperatures and pressures. The detail of the methodology and experimental setup are explained in this paper and measurement results of absorption capacity of ammonia into ionic liquid are discussed. Among all ionic liquids studied in this paper [EtOHmim] + based ionic liquids shows higher absorption capacity than [emim] + based ionic liquids, which means that the OH structure in the cation may improve the absorption capacity of ammonia. IntroductionAbsorption refrigeration system is a good known technology. The absorption systems, which can utilize renewable energy such as solar and geothermal energy or waste heat sources such as exhausts of diesel engines and industrial plants to produce cold, carries a primary energy saving, and thus emission reduction. In addition, the absorption systems contain non-HFC and thus, environmentally friendly and becomes a competitive alternative to the conventional vapour compression refrigeration systems. Similar to the compression cycle, absorption cycle is based on the cooling and heating process associated with phase changes of evaporation and condensation of refrigerant fluid at different temperatures and pressures. The working fluid consists of refrigerant and absorbent, so that the boiling temperature can be modified by changing the pressure or composition of the mixture.One of the most common working fluid pair in absorption refrigeration systems is ammonia/water. In this working pair, ammonia works as refrigerant and water as absorbent. The ammonia/water absorption cycle is used mainly for refrigeration purpose, since it can produce cold below 0°C. Being natural fluids, both are emission free and ozone friendly resulting with zero global warming potential (GWP) and ozone depletion potential (ODP). However, the characteristic of water is volatile, thus it is necessary to add an additional component, namely rectifier, to minimize the amount of water entering to the condenser.

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Process intensification on the separation of benzene and thiophene by extractive distillation

et al. 2015

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The separation of benzene and trace thiophene by extractive distillation was intensified in two aspects, that is, selection of a suitable entrainer and improvement of the process. The mixture of dimethylformamide (DMF) and an ionic liquid (IL) was chosen as the entrainer. Vapor–liquid equilibrium (VLE) experiments using pure DMF and a mixed entrainer were conducted, and UNIFAC model for ILs was extended to the benzene‐thiophene‐DMF‐IL system. The results demonstrated that volatilization loss of DMF in the vapor phase was significantly reduced by adding IL. Moreover, an improved process with only four columns using a mixed entrainer was proposed. The results indicated that the improved process is more promising for decreasing energy consumption and equipment investment compared with the conventional six‐column process. The total heat duties of reboilers and condensers was decreased by 6.47% and 6.41%, respectively. The process intensification strategy may be directly extended to separate trace components of other systems. © 2015 American Institute of Chemical Engineers AIChE J, 61: 4470–4480, 2015

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Evaluation of ionic liquids as absorbents for ammonia absorption refrigeration cycles using COSMO-based process simulations

Cited by 96 publications

References 54 publications

Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property Methods

Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property Methods

Absorption Capacity of Ammonia into Ionic Liquids for Absorption Refrigeration Applications

Process intensification on the separation of benzene and thiophene by extractive distillation

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