Solvent selection and design for CO<sub>2</sub>capture – how we might have been missing the point

Mota-Martinez, Maria T.; Hallett, Jason P.; Dowell, Niall Mac

doi:10.1039/c7se00404d

Cited by 74 publications

(54 citation statements)

References 76 publications

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“…This is why the [C 6 mim][TCM]-based processes have more stages. Moreover, the higher the viscosity of the solvent the higher the pump power, which is related with a higher friction factor and pressure drop [32]. In this study, the increase in pump power is only obvious when comparing the [C 6 mim][TCM] process to the bench Selexol process.…”

Section: Pros and Cons Of Using [C 6 Mim][tcm] As Solvent For Co 2 Camentioning

confidence: 81%

Novel pressure and temperature swing processes for CO2 capture using low viscosity ionic liquids

Zubeir

Lacroix

Meuldijk

et al. 2018

Separation and Purification Technology

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Section: Pros and Cons Of Using [C 6 Mim][tcm] As Solvent For Co 2 Camentioning

confidence: 81%

Novel pressure and temperature swing processes for CO2 capture using low viscosity ionic liquids

Zubeir

Lacroix

Meuldijk

et al. 2018

Separation and Purification Technology

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“…One common feature of these studies is that they mainly focus on the equilibrium water-uptake capacity of the desiccants and frequently ignore other key factors such as kinetic properties. 109 To date, the majority of this effort has consumed plentiful time and resources and has almost exclusively focused on developing desiccants with increased water-uptake capacity and reduced heat of regeneration. This would appear rational given that desiccant regeneration largely affects operational cost.…”

Section: Efficient Sorber and System Designsmentioning

confidence: 99%

Progress and Expectation of Atmospheric Water Harvesting

Wang

Zhang

et al. 2018

Joule

511

330

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Even if people live in an arid desert, they know that plenty of water exists in the air they breathe. However, the reality tells us the atmospheric water cannot help to slake the world's thirst. Thus an important question occurs: what are the fundamental limits of atmospheric water harvesting that can be achieved in typical arid and semi-arid areas? Here, through a thorough review on the present advances of atmospheric water-harvesting technologies, we identify the achievements that have been acquired and evaluate the challenges and barriers that retard their applications. Lastly, we clarify our perspectives on how to search for a simple, scalable, yet cost-effective way to produce atmospheric water for the community and forecast the application of atmospheric water harvesting in evaporative cooling, such as electronic cooling, power plant cooling, and passive building cooling.

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“…Building on previous work, 65 we have developed a modelling tool for the rapid screening of ionic liquids on the basis of their process performance and cost. The model uses an archetypal physical absorption process topology, illustrated in Fig.…”

Section: Model Developmentmentioning

confidence: 99%

“…Heat exchangers are particularly affected by higher viscosities and coolers by the solvent's flowrate and heat capacity, as was demonstrated in our previous work. 65,84 The working capacity of the ionic liquid also contributes to the capital cost. Those ionic liquids with lower CO 2 capacity need higher solvent flowrate, and therefore, larger process units are required.…”

Section: Cost Evaluationmentioning

confidence: 99%

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Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

Mota-Martinez

Brandl

Hallett

et al. 2018

Mol. Syst. Des. Eng.

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Ionic liquids (ILs) have the potential to outperform traditional solvents for CO2 capture, with a great many ILs having been studied to date. In this contribution we present a new approach for their evaluation, and identify which physical properties most infl uence their technical and economic performance. This work highlights a range of potential challenges that ionic liquids will face before they can be applied at process scale, and identifi es some key research opportunities. Ionic liquids have been extensively investigated as promising materials for several gas separation processes, including CO 2 capture. They have the potential to outperform traditional solvents, in terms of their capacity, selectivity, regenerability and stability. In fact, hundreds of ionic liquids have been investigated as potential sorbents for CO 2 capture. However, most studies focus on enhancing equilibrium capacity, and neglect to consider other properties, such as transport properties, and hence ignore the effect that the overall set of properties have on process performance, and therefore on cost. In this study, we propose a new methodology for their evaluation using a range of monetised and non-monetised process performance indices.Our results demonstrate that whilst most research effort is focused on improving CO 2 solubility, viscosity, a transport property, and heat capacity, a thermochemical property, might preclude the use of ionic liquids, even those which are highly CO 2 -philic, and therefore increased effort on addressing the challenges associated with heat capacity and viscosity is an urgent necessity. This work highlights a range of potential challenges that ionic liquids will face before they can be applied at process scale, and identifies some key research opportunities.

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Solvent selection and design for CO₂capture – how we might have been missing the point

Abstract: Efforts to reduce the cost of CO2captureviathe development of new sorbents have primarily focused on increasing CO2working capacity. Here we show that improved transport properties should be the primary focus.

Cited by 74 publications

References 76 publications

Novel pressure and temperature swing processes for CO2 capture using low viscosity ionic liquids

Novel pressure and temperature swing processes for CO2 capture using low viscosity ionic liquids

Progress and Expectation of Atmospheric Water Harvesting

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

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Solvent selection and design for CO2capture – how we might have been missing the point

Abstract: Efforts to reduce the cost of CO2captureviathe development of new sorbents have primarily focused on increasing CO2working capacity. Here we show that improved transport properties should be the primary focus.

Cited by 74 publications

References 76 publications

Novel pressure and temperature swing processes for CO2 capture using low viscosity ionic liquids

Novel pressure and temperature swing processes for CO2 capture using low viscosity ionic liquids

Progress and Expectation of Atmospheric Water Harvesting

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO2capture

Contact Info

Product

Resources

About

Solvent selection and design for CO₂capture – how we might have been missing the point

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture