Encapsulated liquid sorbents for carbon dioxide capture

Vericella, John J.; Baker, Sarah E.; Stolaroff, Joshuah K.; Duoss, Eric B.; Hardin, James O.; Lewicki, James P.; Glogowski, Elizabeth M.; Floyd, William C.; Valdez, Carlos A.; Smith, William L.; Satcher, Joe H.; Bourcier, William L.; Spadaccini, Christopher M.; Lewis, Jennifer A.; Aines, Roger D.

doi:10.1038/ncomms7124

Cited by 170 publications

(178 citation statements)

References 35 publications

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“…From what is available in the open literature it may be concluded that microcapsules may be produced by applying a microfluidic double-capillary device [46]. Typical microcapsules diameters are between 0.1 and 0.6 mm.…”

Section: Practical Examplesmentioning

confidence: 98%

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Budzianowski¹

2016

Green Energy and Technology

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Innovative advanced solvent based capture processes (ASBCPs) employing sophisticated separation mechanisms have emerged as essential solutions that may dramatically reduce high energy requirement of CO 2 separation in capture plants. This study systematically characterises useful mechanisms of several such ASBCPs, being mostly at relatively low technology readiness levels. Based on improved understanding of these emerging ASBCPs it is shown how they can contribute to achieving energy efficiency benefits and thus increase CO 2 capture efficiency. It is followed by an analysis of practical examples of all ASBCPs recently presented in academic and patent literature. Finally, major challenges of discussed emerging ASBCPs are identified showing potential directions for further research and development. Overall, innovative ASBCPs employ very different mechanisms translating to different energy efficiency benefits in various CO 2 capture applications. The provided technological account along with the identified challenges may be useful for capture process developers which will be able to bring the most promising ASBCPs to higher technology readiness levels and finally they can be employed in the practice. Nomenclature 5OCB4,4′-pentyloxy cyanobiphenyl 7OCB 4,4′-heptyloxy cyanobiphenyl AA Aqueous ammonia AAS Amino acid salt ASBCP Advanced solvent based capture process BDA 1,4-butanediamine BTCA Benzotriazole-5-carboxylic acid

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Section: Practical Examplesmentioning

confidence: 98%

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Budzianowski¹

2016

Green Energy and Technology

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“…Polymer capsules with liquid cores have applications in the encapsulation of drugs, cells, pesticides, perfumes, liquid inks, paints, toners, solvents, and reactive liquid chemicals (Peyratout & Dähne, 2004;Vericella et al, 2015;Chen et al, 2014). The middle phase may also contain dissolved particles or amphiphilic molecules such as phospholipids or diblock copolymers, which can undergo self-assembly at two concentric oil/water interfaces upon solvent evaporation, which can lead to the formation of vesicles such as giant liposomes (Shum et al, 2008), polymersomes and colloidosomes (Table 2).…”

Section: Production Of Core-shell Drops In Glass Capillary Devicesmentioning

confidence: 99%

Recent advances in the production of controllable multiple emulsions using microfabricated devices

Vladisavljević

2016

Particuology

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This review focuses on recent developments in fabrication of multiple emulsions in microscale systems, such as membrane, microchannel array and microfluidic emulsification devices.Membrane and microchannel emulsification offer great potential in manufacturing multiple emulsions with uniform drop sizes and high encapsulation efficiency of encapsulated actives.Microfluidic devices enable unprecedented level of control over the number, size and type of internal droplets at each hierarchical level but suffer from low production scales. Microfluidic methods can be exploited to generate high-order multiple emulsions (triple, quadruple and quintuple), non-spherical (discoidal and rod-like) drops and drops with asymmetric properties such as Janus and ternary drops, composed of two or three distinct regions on the surface.Multiple emulsion droplets generated in microfabricated devices can be used as templates for vesicles (polymersomes, liposomes, colloidosomes) with multiple inner compartments for simultaneous encapsulation and release of incompatible actives or reactants.-2-

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“…Dripping is the favourable mode of core-shell droplet generation since the droplets are highly uniform in size, while the jetting regime is associated with polydispersed droplet formation. 26,27 Vericella et al 11 have developed liquid core-solid shell capsules for CO 2 capture to address the drawbacks of traditional amine scrubbing while keeping all benefits of liquid absorbents, such as high CO 2 capture capacity and selectivity. Amine scrubbing, mainly using monoethanolamine (MEA), is the most established and industrially proven approach for CO 2 capture.…”

Section: Introductionmentioning

confidence: 99%

“…28,29 Encapsulation prevents evaporation of absorbent and its direct contact with the capture system, and provides much higher surface area-to-volume ratio, in comparison to typical packed towers. 11 The capsules were produced using a two-step process consisting of generation of core-shell drops in a microfluidic device and subsequent shell polymerisation by exposing the collected drops to UV light in a vial. 11 However, a single step process that combines microfluidic drop generation and in-situ shell polymerisation in the collection channel is highly preferred for continuous production of capsules.…”

Section: Introductionmentioning

confidence: 99%

“…11 The capsules were produced using a two-step process consisting of generation of core-shell drops in a microfluidic device and subsequent shell polymerisation by exposing the collected drops to UV light in a vial. 11 However, a single step process that combines microfluidic drop generation and in-situ shell polymerisation in the collection channel is highly preferred for continuous production of capsules. In addition, although there are several studies on the effect of osmotic pressure imbalance on the stability of core-shell drops and capsules with hard shells, [30][31][32] the effect is yet to be investigated for capsules with elastic shells, where the osmotic pressure gradient across the shell can dramatically change the morphology of the capsules and encapsulation efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Semipermeable Elastic Microcapsules for Gas Capture and Sensing

Nabavi

Vladisavljević

et al. 2016

Langmuir

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Monodispersed microcapsules for gas capture and sensing were developed consisting of elastic semipermeable polymer shells of tuneable size and thickness and pH-sensitive, gas selective liquid cores. The microcapsules were produced using glass capillary microfluidics and continuous on-the-fly photopolymerisation. The inner fluid was 5-30 wt% K 2 CO 3 solution with m-cresol purple, the middle fluid was a UV-curable liquid silicon rubber containing 0-2 wt% Dow Corning ® 749 fluid, and the outer fluid was aqueous solution containing 60-70 wt% glycerol and 0.5-2 wt% stabiliser (polyvinyl alcohol, Tween 20 or Pluronic ® F-127). An analytical model was developed and validated for prediction of the morphology of the capsules under osmotic stress based on the shell properties and the osmolarity of the storage and core solutions. The minimum energy density and UV light irradiance needed to achieve complete shell polymerisation were 2 J•cm -2 and 13.8 mW·cm -2 , respectively. After UV exposure, the curing time for capsules containing 0.5 wt% Dow Corning ® 749 fluid in the middle phase was 30-40 min. The CO 2 capture capacity of 30 wt% K 2 CO 3 capsules was 1.6-2 mmol/g depending on the capsule size and shell thickness. A cavitation bubble was observed in the core when the internal water was abruptly removed by capillary suction, whereas a gradual evaporation of internal water led to buckling of the shell. The shell was characterised using TGA, DSC, and FTIR. The shell degradation temperature was 450-460°C.

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Encapsulated liquid sorbents for carbon dioxide capture

Cited by 170 publications

References 35 publications

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Recent advances in the production of controllable multiple emulsions using microfabricated devices

Semipermeable Elastic Microcapsules for Gas Capture and Sensing

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