Improving the regeneration of CO2-binding organic liquids with a polarity change

Mathias, Paul M.; Afshar, Kash; Zheng, Feng; Bearden, Mark D.; Freeman, Charles J.; Andrea, Tamer; Koech, Phillip K.; Kutnyakov, Igor V.; Zwoster, Andy; Smith, A.; Jessop, Philip G.; Nik, Omid Ghafari; Heldebrant, David J.

doi:10.1039/c3ee41016a

Cited by 82 publications

(153 citation statements)

References 30 publications

(39 reference statements)

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“…The main advantages of using all-organic solvents are their lower cost of energy due to the elimination of the vaporization of water, lower stripper reboiler temperature, and their tunable physicochemical properties. Therefore, they have considerable potential to be an efficient CO 2 capture solvent due to high CO 2 binding capacities, low heat capacities, less solvent loss during CO 2 stripping and lower energy requirement for regeneration than the traditional aqueous amine systems [19]. Consequently, there Fig.…”

Section: Co 2 Binding Organic Liquids (Co 2 Bols)mentioning

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

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Section: Co 2 Binding Organic Liquids (Co 2 Bols)mentioning

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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“…They have tunable physicochemical properties; the solvent reverts back to its less-polar non-ionic form and is ready for future CO 2 uptake (Tao Yu et al 2008). The main advantages of these systems are high CO 2 binding capacities, low heat capacities and lower energy requirement for regeneration as compared to aqueous alkanolamine solutions (Mathias et al 2013). Wang et al developed several strategies to reduce volatility of superbase-derived absorbents by making them such as alcohol-functionalized ionic liquids (Wang et al 2010).…”

Section: Introductionmentioning

confidence: 97%

“…It is presumed that the base of CO 2 BOL does not react directly with CO 2 , as amines react to form carbamates. Conversely, the alcohol group in the CO 2 BOL reacts firstly with CO 2 to form an alkyl carbonic acid, and then protonates the base to form a liquid alkylcarbonate (Mathias et al 2013). Alkyl carbonate salts formed are non-volatile ionic compounds and they do not contain as much hydrogen bond as carbamate and bicarbonate salts do.…”

Section: Introductionmentioning

confidence: 98%

Kinetics of CO2 Capture by Carbon Dioxide Binding Organic Liquids

Orhan

Kayı

Alper

2016

Energy, Transportation and Global Warming

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“…13 Also, non-ionic (low polarity) regions may provide voids with high CO2 solubility and unreacted solvent available to complex with CO2, accounting for the higher than expected CO2 mass transfer in and out of SWILs. 32 This may explain how a non-polar additive dissolves into solution to change the solvation free energies of the ions in solution, facilitating CO2 release. 32 Alternatively, concentrated ionic regions could provide favourable solvation environments for catalysts for CO2 hydrogenations 6 or precursors for nanoparticle synthesis.…”

mentioning

confidence: 99%

“…32 This may explain how a non-polar additive dissolves into solution to change the solvation free energies of the ions in solution, facilitating CO2 release. 32 Alternatively, concentrated ionic regions could provide favourable solvation environments for catalysts for CO2 hydrogenations 6 or precursors for nanoparticle synthesis. 8,9,12 .…”

mentioning

confidence: 99%