Innovative reverse-electrodialysis power generation system for carbon capture and utilization

Kim, Han−Ki; Kim, Young Eun; Jeong, Namjo; Hwang, Kyo-Sik; Han, Ji-Hyung; Nam, Joo-Youn; Jwa, Eunjin; Nam, Sung-Chan; Park, Sungyoul; Yoon, Young-Gui; Kim, Chan-Soo

doi:10.1016/j.jcou.2017.05.025

Cited by 18 publications

(42 citation statements)

References 37 publications

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“…Research in the field of RED often reports that the low ionic‐strength compartment provides the highest contribution to the internal resistance of an RED device. [ 55 ] By using a lean solution (at 20 wt% MEA, κ = 1.1 mS cm −1 ) instead of deionized water [ 19 ] ( κ = 5.5 × 10 −5 mS cm −1 ), we greatly reduced the internal resistance of the low ionic‐strength compartments (Figure S2, Supporting Information). We proceeded to use a 20 wt% MEA solution for all other experiments.…”

Section: Optimization Of the Mea Concentrationmentioning

confidence: 99%

The Green Lean Amine Machine: Harvesting Electric Power While Capturing Carbon Dioxide from Breath

et al. 2021

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As wearable technologies redefine the way people exchange information, receive entertainment, and monitor health, the development of sustainable power sources that capture energy from the user's everyday activities garners increasing interest. Electric fishes, such as the electric eel and the torpedo ray, provide inspiration for such a power source with their ability to generate massive discharges of electricity solely from the metabolic processes within their bodies. Inspired by their example, the device presented in this work harnesses electric power from ion gradients established by capturing the carbon dioxide (CO2) from human breath. Upon localized exposure to CO2, this novel adaptation of reverse electrodialysis chemically generates ion gradients from a single initial solution uniformly distributed throughout the device instead of requiring the active circulation of two different external solutions. A thorough analysis of the relationship between electrical output and the concentration of carbon capture agent (monoethanolamine, MEA), the amount of CO2 captured, and the device geometry informs device design. The prototype device presented here harvests enough energy from a breath‐generated ion gradient to power small electronic devices, such as a light‐emitting diode (LED).

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Section: Optimization Of the Mea Concentrationmentioning

confidence: 99%

The Green Lean Amine Machine: Harvesting Electric Power While Capturing Carbon Dioxide from Breath

et al. 2021

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“…Membranes and the solution resistance were measured using a handmade acrylic cell consisting of two parts separated by a membrane with an effective area of 1 cm 2 , as described in our previous study [4]. The sample solution was prepared using NaCl (model seawater) with a conductivity of 49 mS/cm at 25 • C. Briefly, the sample solution was purged inside the cell and the cell was then immersed in a water bath at 20 ± 1 • C to measure the solution bulk resistance without a membrane, R bulk .…”

Section: Data Availability Statementmentioning

confidence: 99%

“…Increasing world energy demand, especially in the last few decades, has caused the continuous use and burning of fossil fuels [1][2][3][4]. Consumption of more fossil fuels has increased concerns regarding different environmental aspects (e.g., global warming, air pollution, and CO 2 emissions), which has resulted in more attention on new and renewable sources of energy [1].…”

Section: Introductionmentioning

confidence: 99%

“…In the last decade, different SGE-based processes have been introduced and improved mainly because of advancements in membrane technology [8][9][10]. Membrane-based reverse electrodialysis (RED) is a sustainable process that uses SGE for energy generation [1][2][3][4][5][6][7][8][11][12][13]. Developing RED can be an appropriate energy production method because it directly converts salinity power into electrical energy [14].…”

Section: Introductionmentioning

confidence: 99%

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Power Generation Performance of a Pilot-Scale Reverse Electrodialysis Using Monovalent Selective Ion-Exchange Membranes

et al. 2021

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Reverse electrodialysis (RED) is a promising process for harvesting energy from the salinity gradient between two solutions without environmental impacts. Seawater (SW) and river water (RW) are considered the main RED feed solutions because of their good availability. In Okinawa Island (Japan), SW desalination via the reverse osmosis (RO) can be integrated with the RED process due to the production of a large amount of RO brine (concentrated SW, containing ~1 mol/dm3 of NaCl), which is usually discharged directly into the sea. In this study, a pilot-scale RED stack, with 299 cell pairs and 179.4 m2 of effective membrane area, was installed in the SW desalination plant. For the first time, asymmetric monovalent selective membranes with monovalent selective layer just at the side of the membranes were used as the ion exchange membranes (IEMs) inside the RED stack. Natural and model RO brines, as well as SW, were used as the high-concentrate feed solutions. RW, which was in fact surface water in this study and close to the desalination plant, was utilized as the low-concentrate feed solution. The power generation performance investigated by the current-voltage (I–V) test showed the maximum gross power density of 0.96 and 1.46 W/m2 respectively, when the natural and model RO brine/RW were used. These are a 50–60% improvement of the maximum gross power of 0.62 and 0.97 W/m2 generated from the natural and model SW, respectively. The approximate 50% more power generated from the model feed solutions can be assigned to the suppression of concentration polarization of the RED stack due to the absence of multivalent ions.

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“…The ever increasing energy demand worldwide and environmental issues such as CO 2 emissions have led to an increased focus on renewable energy sources such as wind, sun and hydro power [1,2] Among all of the renewable sources used for energy production, salinity gradient energy (SGE) is known to be one of the most readily available and appropriate. SGE is defined as the electrochemical potential between two solutions with different concentrations, especially salt concentration.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Feed Solution Temperature on the Power Output Performance of a Pilot-Scale Reverse Electrodialysis (RED) System with Different Intermediate Distance

et al. 2019

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Membrane-based reverse electrodialysis (RED) can convert the salinity gradient energy between two solutions into electric power without any environmental impact. Regarding the practical application of the RED process using natural seawater and river water, the RED performance depends on the climate (temperature). In this study, we have evaluated the effect of the feed solution temperature on the resulting RED performance using two types of pilot-scale RED stacks consisting of 200 cell pairs having a total effective membrane area of 40 m2 with different intermediate distances (200 µm and 600 µm). The temperature dependence of the resistance of the solution compartment and membrane, open circuit voltage (OCV), maximum gross power output, pumping energy, and subsequent net power output of the system was individually evaluated. Increasing the temperature shows a positive influence on all the factors studied, and interesting linear relationships were obtained in all the cases, which allowed us to provide simple empirical equations to predict the resulting performance. Furthermore, the temperature dependence was strongly affected by the experimental conditions, such as the flow rate and type of stack, especially in the case of the pilot-scale stack.

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Innovative reverse-electrodialysis power generation system for carbon capture and utilization

Cited by 18 publications

References 37 publications

The Green Lean Amine Machine: Harvesting Electric Power While Capturing Carbon Dioxide from Breath

The Green Lean Amine Machine: Harvesting Electric Power While Capturing Carbon Dioxide from Breath

Power Generation Performance of a Pilot-Scale Reverse Electrodialysis Using Monovalent Selective Ion-Exchange Membranes

The Effect of Feed Solution Temperature on the Power Output Performance of a Pilot-Scale Reverse Electrodialysis (RED) System with Different Intermediate Distance

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