Low-energy sodium hydroxide recovery for CO2 capture from atmospheric air—Thermodynamic analysis

Mahmoudkhani, Maryam; Keith, David W.

doi:10.1016/j.ijggc.2009.02.003

Cited by 231 publications

(190 citation statements)

References 15 publications

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“…Thus, the carbonate is formed in solution and its reuse is conditioned by the further purification steps. Alkaline absorption has also achieved much attention in the direct capture of CO2 from ambient air, "air capture", in order to manage dispersed emissions, such as transportation [12]. But the main challenge that has to be solved to close the loop by reusing the carbonate (e.g., NaCO3) or recovering the reagent (e.g., NaOH) and the pure CO2 is the development of a process that allows obtaining the dried carbonate (e.g., Na2CO3).…”

Section: Introductionmentioning

confidence: 99%

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Technical viability and exergy analysis of membrane crystallization: Closing the loop of CO2 sequestration

Luis

Aubel

Bruggen

2013

International Journal of Greenhouse Gas Control

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Section: Introductionmentioning

confidence: 99%

“…or it can be converted back to sodium hydroxide and pure CO2 by means of, for example, a causticization process with Ca(OH)2 [12].…”

Section: Introductionmentioning

confidence: 99%

Technical viability and exergy analysis of membrane crystallization: Closing the loop of CO2 sequestration

Luis

Aubel

Bruggen

2013

International Journal of Greenhouse Gas Control

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“…These proposed methods, referred to as geoengineering, cover a wide range of technologies aiming to reduce either 1) the atmospheric CO 2 concentration, e.g. by air capture methods (Baciocchi et al, 2006;Mahmoudkhani and Keith, 2009) or by enhancing the oceanic carbon storage (Khesghi, 1995), or 2) the amount of solar radiation absorbed in the atmosphere and the Earth's surface, e.g. by adding sulphate aerosol to stratosphere (Crutzen, 2006) or by increasing the albedo of the land surface (Akbari et al, 2009;Rigdwell et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of marine cloud albedo via controlled sea spray injections: a global model study of the influence of emission rates, microphysics and transport

2010

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Abstract. Modification of cloud albedo by controlled emission of sea spray particles into the atmosphere has been suggested as a possible geoengineering option to slow global warming. Previous global studies have imposed changes in cloud drop concentration in low level clouds to explore the radiative and climatic effects. Here, we use a global aerosol transport model to quantify how an imposed flux of sea spray particles affects the natural aerosol processes, the particle size distribution, and concentrations of cloud drops. We assume that the proposed fleet of vessels emits sea spray particles with a wind speed-dependent flux into four regions of persistent stratocumulus cloud off the western coasts of continents. The model results show that fractional changes in cloud drop number concentration (CDNC) vary substantially between the four regions because of differences in wind speed (which affects the spray efficiency of the vessels), transport and particle deposition rates, and because of variations in aerosols from natural and anthropogenic sources. Using spray emission rates comparable to those implied by previous studies we find that the predicted CDNC changes are very small (maximum 20%) and in one of the four regions even negative. The weak or negative effect is because the added particles suppress the in-cloud supersaturation and prevent existing aerosol particles from forming cloud drops. A scenario with five times higher emissions (considerably higher than previously assumed) increases CDNC on average by 45-163%, but median concentrations are still below the 375 cm −3 assumed in previous studies. An inadvertent effect of the spray emissions is that sulphur dioxide concenCorrespondence to: H. Korhonen (hannele.korhonen@fmi.fi) trations are suppressed by 1-2% in the seeded regions and sulphuric acid vapour by 64-68% due to chemical reactions on the additional salt particles. The impact of this suppression on existing aerosol is negligible in the model, but should be investigated further in the real environment so that inadvertent impacts can be excluded.

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“…This could be due to the present of essential nutrient in BRSP for algal metabolism such as Biotin, Thiamine, and Vitamin B 12 [13]. A. falcatus biomass productivity (BP) is calculated using (5), where DBW 0 and DBW f are initial and final DBW of A. falcatus and t is the time of cultivation. It was determined that the BP for BRSP media is 5.09 mg/L-day while 3.59 mg/L-day for NPK media.…”

Section: Resultsmentioning

confidence: 99%

“…Alternative CCS technology utilized alkaline solutions (e.g. NaOH) and microalgae in photobioreactor [5][6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ankistrodesmus falcatus for Bicarbonate-Based Integrated Carbon Capture System (BICCAPS)

Beltran

Gravador

et al. 2018

MATEC Web Conf.

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Abstract. This study evaluates the performance of alkaliphilic microalgae Ankistrodesmus falcatus in the Bicarbonate-based Integrated Carbon Capture and Algae Production System (BICCAPS). The system utilized bicarbonate as carbon source for microalgae production. BICCAPS parameters such as pH, algal biomass productivity and CO2 utilization (inorganic carbon conversion, Ci) were observed at different sodium bicarbonate (NaHCO3) loading concentration and type of culture media. The highest productivity was observed at 10 g/L of NaHCO3 loading in BRSP medium at 3.5539 mg/L/day. This value is 30% lower compared to the control experiment (continuously aerated bioreactor). The Ci values of the different system ranges from 1.17 x 10 -4 to 1.51 x 10 -4 moles/L/day. Both the pH of the BRSP and NPK media at 10 g/L and 30g/L loading of NaHCO3 increased through time. The result shows that A. falcatus has a potential in BICCAPS utilization.

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Low-energy sodium hydroxide recovery for CO2 capture from atmospheric air—Thermodynamic analysis

Cited by 231 publications

References 15 publications

Technical viability and exergy analysis of membrane crystallization: Closing the loop of CO2 sequestration

Technical viability and exergy analysis of membrane crystallization: Closing the loop of CO2 sequestration

Enhancement of marine cloud albedo via controlled sea spray injections: a global model study of the influence of emission rates, microphysics and transport

Evaluation of Ankistrodesmus falcatus for Bicarbonate-Based Integrated Carbon Capture System (BICCAPS)

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