Carbon Dioxide Capture Using an Electrochemically Driven Proton Concentration Process

Rahimi, Maryam; Catalini, Giulia; Hariharan, Subrahmaniam; Wang, Miao; Puccini, Monica; Hatton, T. Alan

doi:10.1016/j.xcrp.2020.100033

Cited by 65 publications

(82 citation statements)

References 42 publications

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“…The electrodes can host protons (i.e., intercalation) during reduction and release them (i.e., deintercalation) during oxidation, creating the required pH-swing for CO 2 absorption and desorption, respectively [167]. In such methods, periodic electrode polarity and the switching fluid flows ensure a continuous process.…”

Section: Electrode Induced Ph-swingmentioning

confidence: 99%

“…Amines are derivatives of ammonia (NH 3 ), containing a basic nitrogen atom, where one (R−NH 2 ) or more hydrogen atoms have been replaced by a substituent. Amines act as a nucleophiles (i.e., electron pair donors also known as Lewis bases), reacting with CO 2 at the electrophilic (i.e., electron pair acceptor) carbon center to form a carbamate (derivatives of carbamic acid H 2 NCOOH where one or more hydrogens are replaced by other organic functional groups) [49,167,278]. Although the amine capture processes are extensively studied, the reaction mechanism is not yet fully understood.…”

Section: Absorption (Wet Scrubbing)mentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical carbon dioxide capture to close the carbon cycle

Sharifian

Wagterveld²,

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Section: Electrode Induced Ph-swingmentioning

confidence: 99%

Section: Absorption (Wet Scrubbing)mentioning

confidence: 99%

Electrochemical carbon dioxide capture to close the carbon cycle

Sharifian

Wagterveld²,

Digdaya

et al. 2021

Energy Environ. Sci.

306

196

View full text Add to dashboard Cite

show abstract

“…We, the scientists, had long ago come to the conclusion that the catastrophic impact of climate change is undeniable [1][2][3][4]. We have put tons of graphs, data, and presentations together and communicated them mainly within the community [5][6][7][8]. Accordingly, we have developed mostly science-oriented strategies to address the issue [9][10][11]; these are necessary but, apparently, not enough.…”

mentioning

confidence: 99%

Public Awareness: What Climate Change Scientists Should Consider

Rahimi

2020

Sustainability

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In this Opinion, the importance of public awareness to design solutions to mitigate climate change issues is highlighted. A large-scale acknowledgment of the climate change consequences has great potential to build social momentum. Momentum, in turn, builds motivation and demand, which can be leveraged to develop a multi-scale strategy to tackle the issue. The pursuit of public awareness is a valuable addition to the scientific approach to addressing climate change issues. The Opinion is concluded by providing strategies on how to effectively raise public awareness on climate change-related topics through an integrated, well-connected network of mavens (e.g., scientists) and connectors (e.g., social media influencers).

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“…Besides ion exchange membranes, pH swing can be obtained by electrosorption of proton by using proton-selective electrochemically active material. This approach has been adopted in a pseudo-capacitive cell using intercalation electrodes 64 and a protoncoupled electron transfer (quinones 65 ).…”

Section: Molten Carbonate Co2 Concentratormentioning

confidence: 99%

“…The latter shows great promises in terms of capacity and energy efficiency, and therefore we recommend investigating first the use of intercalation electrodes for CO2-CDI. As a matter of fact, novel concepts start to emerge on such systems, e.g., the proton-driven concentration process with intercalation electrodes 64 , the faradaic electro-swing adsorption process 57 , and supercapacitive swing adsorption 61,107 . Overall, these different technologies share similar principles (all using capacitive or pseudocapacitive electrodes) and show promises for the future of CO2 capture.…”

Section: Explore Other Alternatives In Terms Of Cell Design and Electmentioning

confidence: 99%

Capacitive processes for carbon capture and energy recovery from CO2 emissions : Shaping a new technology going from water to gas applications

Legrand¹

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Nonetheless, how can we convert a water technology into a gas technology? The first step is to identify a strategy to produce ions from CO2 gas. As CO2 gas is not an ion, the CDI and CAPMIX cells are not directly usable with gas streams. Nevertheless, ions can be generated from CO2 by sparging CO2 gas in water, a process in which bicarbonate ions are formed (see Box 1). 1.3.2. Electrochemical pH swing CO2 capture can be achieved by generating a pH swing between two chambers in an electrochemical cell. The electrochemical pH swing has been mostly investigated in electrodialysis cell 62,63 and bipolar electrodialysis cell 49,53-55. The CO2 absorption takes place in the alkaline compartment (high pH) through the reaction of CO2 with hydroxide (CO + OH → HCO), whereas the CO2 desorption takes place in the acidic compartment (HCO + H → CO). Fig. 1.6 shows an example of CO2 capture with bipolar electrodialysis. Supercapacitive swing adsorption (SAA) is an electrical double-layer capacitor (EDLC) for CO2 capture 58-61. The concept consists of adsorbing CO2 on the cathode in a gas channel while charging the EDLC cell in a highly concentrated NaCl solution. Fig. 1.8 shows an illustration of the SAA concept. Three mechanisms have been suggested for the CO2 gas adsorption in the electrodes, i.e. (a) adsorption of gas molecules at gas-solid interface, (b) adsorption of gas molecules at the gas-liquid interface, and (c) adsorption of ionized gas molecule 61. Adsorption at the gas-solid interface would occur when CO2 gas is adsorbed in non-filled electrode pores stimulated by a change of affinity between the pore wall and CO2 during the charging step of the cell. Adsorption at the gas-liquid interface would occur due to an increased CO2 solubility in the electrical double layer (EDL) by charging the capacitive cell. Finally, ionization adsorption occurs through the adsorption where ϵ. is the dielectric constant, ϵ 0 is the permittivity of free space, R the gas constant, T the temperature, F the Faraday constant and c 4 the ion concentration in the bulk solution. Finally, the Stern layer represents the layer of solution separating the diffuse layer, and the carbon matrix surface. In theory, ions are surrounded by a hydration shell, and therefore, the charged ions are not infinitely close to the electrode surface. IEMs are ionomer, i.e., charged polymer, which primarily act as selective charge barriers. Ideally, only anions can be transported through the AEM, and only cations can be transported through the CEM (counter-ion transport). IEMs are mainly used in CDI to improve the charge efficiency (in Membrane CDI or MCDI) 70,72 and are required in CAPMIX to generate an electrical potential.

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Carbon Dioxide Capture Using an Electrochemically Driven Proton Concentration Process

Cited by 65 publications

References 42 publications

Electrochemical carbon dioxide capture to close the carbon cycle

Electrochemical carbon dioxide capture to close the carbon cycle

Public Awareness: What Climate Change Scientists Should Consider

Capacitive processes for carbon capture and energy recovery from CO2 emissions : Shaping a new technology going from water to gas applications

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