Ex situ CO&lt;inf&gt;2&lt;/inf&gt; mineralization via nesquehonite: A first attempt for an industrial application

Vito, Caterina De; Ferrini, Vincenzo; Mignardi, Silvano; Cagnetti, Marco; Leccese, Fabio

doi:10.1109/eeeic.2012.6221396

Cited by 8 publications

(35 citation statements)

References 13 publications

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“…7 sequestro de dióxido de carbono é descrita na literatura como eficaz, rápida e com poucos riscos de liberação do gás carbônico após a formação dos carbonatos devido à estabilidade destes compostos. [14][15][16] Dentre os compostos que podem ser formados se destaca o carbonato de magnésio, com estrutura da nesqueonita (MgCO 3 •3H 2 O), pela possibilidade de formação a temperatura ambiente (25 a 35 o C) e cinética rápida de reação. O cloreto de magnésio, principal composto utilizado na reação de carbonatação e formação do MgCO 3 •3H 2 O, é abundantemente encontrado em salmouras naturais e efluentes industriais, tais como efluentes de lavras por dissolução de potássio ou mesmo água do mar.…”

Section: Sequestro De Carbonounclassified

“…A exploração da reação de carbonatação em meio aquoso rico em compostos de magnésio e cálcio, como forma de sequestro de dióxido de carbono, está largamente descrita na literatura. [14][15][16]20 O dióxido de carbono reage com o cátion de metais alcalinos contido em salmouras segundo a sequência de reações apresentadas pelas Equações 1 a 8: 21…”

Section: O Sequestro De Carbono E Os Efluentes Salinosunclassified

“…Esta metodologia foi adaptada da literatura. [14][15][16] A escolha da limitação do pH ao máximo de 8,9 ocorre devido à dois motivos principais: (i) para limitar ou mesmo evitar a precipitação de hidróxidos ao invés de carbonatos em pH's mais elevados, o que iria contra o objetivo de se fixar o CO 2 em forma estável e definitiva. A precipitação preferencial de hidróxidos poderia manter o íon carbonato na fase aquosa; (ii) devido à Resolução 43/2011 do Conselho Nacional do Meio Ambiente (CONAMA), que estabelece o pH máximo para disposição de efluentes nos corpos hídricos igual a 9.…”

Section: Reação De Carbonataçãounclassified

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Fixação de CO2 em efluente salino de indústria petroquímica

Santos¹,

Santos²,

Rocha³

2017

Quim. Nova

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FIXATION OF CO 2 IN BRINES OF PETROCHEMICAL INDUSTRY. In various industrial processes, such as the process of obtaining potassium by solution mining or in the oil industry, fuels are burnt concurrently to the formation of saline effluents. The opportunity to sequester carbon through capturing the CO 2 from the flue gas by carbonation of these effluents and reducing the potential of scaling of the water is evident. The use of saline industrial effluent from electrodialysis for carbon sequestration by mineralization of carbon dioxide is the focus of this work. The carbonation reaction of saline effluent of reverse electrodialysis, of low ionic strength and higher CO 2 solubility, was simulated through OLI ®. Precipitation tests were performed by bubbling 10-20 NL h-1 CO 2 in a glass reactor containing the brine and pH adjusted to 8.9. The solid was characterized and the results from the simulation and the experiments were compared. The removal of calcium and strontium in the form of carbonates reach out up to 98% and 75%. The simulation results were in line with the experimental results for the calcium behavior, but not for strontium. The OLI ® simulation was powerful to represent the calcium carbonate formation, however, comparisons between predicted Sr removal and testwork results presented differences and must be investigated.

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Section: Sequestro De Carbonounclassified

Section: O Sequestro De Carbono E Os Efluentes Salinosunclassified

Section: Reação De Carbonataçãounclassified

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Fixação de CO2 em efluente salino de indústria petroquímica

Santos¹,

Santos²,

Rocha³

2017

Quim. Nova

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“…[2][3][4] Recent studies showed that nesquehonite can be the product of CO 2 mineralization under low pressure conditions. [5,6] The main advantage of nesquehonite in being a potential permanent storage for CO 2 emissions is that at least 30% of its structure consists of CO 3 2−. [5] Besides, nesquehonite's synthesis requires earth's ambient conditions, [7] resulting in a high-energy efficiency CO 2 mineralization.…”

Section: Introductionmentioning

confidence: 99%

A combined Raman, Fourier transform infrared, and X‐ray diffraction study of thermally treated nesquehonite

Skliros

Tsakiridis

Perraki

2019

J Raman Spectroscopy

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Nesquehonite synthesized by mixing MgCl2·6H2O and Na2CO3 at T 25°C, was thermally treated at various temperatures (170°C, 200°C, 295°C, 350°C, and 390°C), based on thermal analysis study of raw nesquehonite. The mineral phases formed at each temperature were studied by means of Raman microspectroscopy, Fourier transform infrared spectroscopy, and X‐ray diffraction. After thermal treatment of raw nesquehonite above 295°C, its dominant Raman peak at 1,100 cm−1, which corresponds to the v1 CO32− antisymmetric stretching vibrations, exhibits broadening and upshift of up to 10 cm−1, whereas the Raman peaks at 707 cm−1, at 770 cm−1, at 1,425 cm−1, and at 1,710 cm−1 disappear, and new Raman peaks arise at 1,282 cm−1 and at 1,386 cm−1. The latter have been attributed to the decomposition of HCO3−, in accordance with the Fourier transform infrared spectroscopy study. According to the differential thermal analysis study, water of crystallization is lost in two steps until 295°C; therefore, the phase studied above this temperature corresponds to Mg (HCO3)(OH). The Raman peak at 3,550 cm−1 assigned to the existence of OH−, exhibits weakening after thermal treatment. Our results corroborate a Mg (HCO3)OH·2H2O nesquehonite formula.

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“…The brine water from the Oriskany Sandstone aquifer in Indiana, Pennsylvania, for example, contains 2490 mg/l Mg 2þ ions. Ferrini et al 23,24 designed a laboratory-scale reactor that can be used to mix pure CO 2 gas into MgCl 2 solutions to form nesquehonite (Mg(OH)(HCO 3 ),2H 2 O) under ambient conditions. 20 The ocean is the largest CO 2 sink, with most of the gas dissolved from the atmosphere staying in the surface water.…”

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confidence: 99%