Human activities and natural processes contribute to the emission of greenhouse gases like carbon... more Human activities and natural processes contribute to the emission of greenhouse gases like carbon dioxide, nitrous oxide, methane, and halogenated compounds. GHGs absorb infrared radiation and trap heat within the atmosphere, increasing the natural greenhouse effect known as global warming. The amount of CO 2 emissions is around 15-20% in the atmosphere and a major contributor in the greenhouse gases [1]. The CO 2 emissions from energy related sources of the United States, Japan and European Union declined significantly in 2019, compared with the previous year 2018, but emissions in the rest of the world increased by a same amount which levelling off the overall CO 2 emissions [2]. The main problem of the environment today is the maximum CO 2 emissions which induce global warming as a result. The earth's climate is differing constantly because of different factors, viz., change in the Sun's intensity, and change in the Earth's orbit, volcanic emissions, and increase in Greenhouse Gas (GHG) concentrations. The increase in the earth's temperature is due to the phenomenon where carbon dioxide (CO 2),
Global warming is one of the major problems in the developing world, and one of the major causes ... more Global warming is one of the major problems in the developing world, and one of the major causes of global warming is the generation of carbon dioxide (CO2) because of the burning of fossil fuels. Burning fossil fuels to meet the energy demand of households and industries is unavoidable. The current commercial and experimental techniques used for capturing and storing CO2 have serious operational and environmental constraints. The amine-based absorption technique for CO2 capture has a low absorption and desorption ratio, and the volatile and corrosive nature of the solvent further complicates the situation. To overcome all of these problems, researchers have used ionic liquids (ILs) and deep eutectic solvents (DESs) as a replacement for commercial amine-based solvents. ILs and deep eutectic solvents are tunable solvents that have a very low vapor pressure, thus making them an ideal medium for CO2 capture. Moreover, most ionic liquids and deep eutectic solvents have low toxicity and ...
Carbon capture and concentration of low partial pressure CO 2 in air and flue gas is a key step i... more Carbon capture and concentration of low partial pressure CO 2 in air and flue gas is a key step in carbon abatement strategies. Traditional CO 2 capture methods employ temperature or pressure swings; however, electrochemical swings, in which an applied potential modulates nucleophilicity, are also possible to mediate the capture and release of CO 2. In contrast to the breadth of electrochemical CO 2 reduction research, electrochemically mediated CO 2 capture and concentration is an emerging field. Although some aspects are reminiscent of those in CO 2 reduction, like local pH gradients and (bi)carbonate equilibria, ultimately electrochemical CO 2 capture and concentration poses its own unique challenges that will benefit from insights from intercalative batteries, redox flow batteries, and biomimetic/-inspired design, among other fields. After an introduction to carbon capture and current chemical strategies, this Review highlights promising emerging electrochemical methods to enable CO 2 capture and concentration; specifically discussed are organic redox, transition metal redox, and pH swings. It closes with an outlook and discussion of future research challenges for electrochemically mediated capture.
Human activities and natural processes contribute to the emission of greenhouse gases like carbon... more Human activities and natural processes contribute to the emission of greenhouse gases like carbon dioxide, nitrous oxide, methane, and halogenated compounds. GHGs absorb infrared radiation and trap heat within the atmosphere, increasing the natural greenhouse effect known as global warming. The amount of CO 2 emissions is around 15-20% in the atmosphere and a major contributor in the greenhouse gases [1]. The CO 2 emissions from energy related sources of the United States, Japan and European Union declined significantly in 2019, compared with the previous year 2018, but emissions in the rest of the world increased by a same amount which levelling off the overall CO 2 emissions [2]. The main problem of the environment today is the maximum CO 2 emissions which induce global warming as a result. The earth's climate is differing constantly because of different factors, viz., change in the Sun's intensity, and change in the Earth's orbit, volcanic emissions, and increase in Greenhouse Gas (GHG) concentrations. The increase in the earth's temperature is due to the phenomenon where carbon dioxide (CO 2),
Global warming is one of the major problems in the developing world, and one of the major causes ... more Global warming is one of the major problems in the developing world, and one of the major causes of global warming is the generation of carbon dioxide (CO2) because of the burning of fossil fuels. Burning fossil fuels to meet the energy demand of households and industries is unavoidable. The current commercial and experimental techniques used for capturing and storing CO2 have serious operational and environmental constraints. The amine-based absorption technique for CO2 capture has a low absorption and desorption ratio, and the volatile and corrosive nature of the solvent further complicates the situation. To overcome all of these problems, researchers have used ionic liquids (ILs) and deep eutectic solvents (DESs) as a replacement for commercial amine-based solvents. ILs and deep eutectic solvents are tunable solvents that have a very low vapor pressure, thus making them an ideal medium for CO2 capture. Moreover, most ionic liquids and deep eutectic solvents have low toxicity and ...
Carbon capture and concentration of low partial pressure CO 2 in air and flue gas is a key step i... more Carbon capture and concentration of low partial pressure CO 2 in air and flue gas is a key step in carbon abatement strategies. Traditional CO 2 capture methods employ temperature or pressure swings; however, electrochemical swings, in which an applied potential modulates nucleophilicity, are also possible to mediate the capture and release of CO 2. In contrast to the breadth of electrochemical CO 2 reduction research, electrochemically mediated CO 2 capture and concentration is an emerging field. Although some aspects are reminiscent of those in CO 2 reduction, like local pH gradients and (bi)carbonate equilibria, ultimately electrochemical CO 2 capture and concentration poses its own unique challenges that will benefit from insights from intercalative batteries, redox flow batteries, and biomimetic/-inspired design, among other fields. After an introduction to carbon capture and current chemical strategies, this Review highlights promising emerging electrochemical methods to enable CO 2 capture and concentration; specifically discussed are organic redox, transition metal redox, and pH swings. It closes with an outlook and discussion of future research challenges for electrochemically mediated capture.
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