Feasibility of CO<sub>2</sub> Fixation via Artificial Rock Weathering

Wu, Jeffrey C.S.; Sheen, Jenn-Der; Chen, Shyan-Yeh; Fan, Ya-Chun

doi:10.1021/ie010222l

Cited by 63 publications

(33 citation statements)

References 7 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the formation of CaCO3 can be achieved by a simple precipitation reaction between Ca 2+ and CO 3 2− ions, the controllable formation of a specific polymorph of CaCO3 is still a practical challenge. Various synthesis factors and their effects on the formation of CaCO3 polymorphs have been investigated thus far using simple model chemicals (e.g., CaCl2 and K2CO3), or via the extraction of Ca 2+ from natural silicates (e.g., wollastonite) (Zhao et al, 2013), and industrial wastes (e.g., steel slag, fly ash, waste cement, and blast furnace slag) (Wu et al, 2001;Huijgen and Comans, 2005;Eloneva et al, 2008a;Chang et al, 2011;Nduagu et al, 2012;Mun and Cho, 2013).…”

Section: Synthesis Variables and Their Effects On The Formation Of Camentioning

confidence: 99%

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

et al. 2017

View full text Add to dashboard Cite

The transformation of CO2 into a precipitated mineral carbonate through an ex situ mineral carbonation route is considered a promising option for carbon capture and storage (CCS) since (i) the captured CO2 can be stored permanently and (ii) industrial wastes (i.e., coal fly ash, steel and stainless-steel slags, and cement and lime kiln dusts) can be recycled and converted into value-added carbonate materials by controlling polymorphs and properties of the mineral carbonates. The final products produced by the ex situ mineral carbonation route can be divided into two categories-low-end high-volume and high-end low-volume mineral carbonates-in terms of their market needs as well as their properties (i.e., purity). Therefore, it is expected that this can partially offset the total cost of the CCS processes. Polymorphs and physicochemical properties of CaCO3 strongly rely on the synthesis variables such as temperature, pH of the solution, reaction time, ion concentration and ratio, stirring, and the concentration of additives. Various efforts to control and fabricate polymorphs of CaCO3 have been made to date. In this review, we present a summary of current knowledge and recent investigations entailing mechanistic studies on the formation of the precipitated CaCO3 and the influences of the synthesis factors on the polymorphs.

show abstract

Section: Synthesis Variables and Their Effects On The Formation Of Camentioning

confidence: 99%

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Existem vários estudos sobre alteração experimental de rochas silicáticas, como os de HYPOLITO (1974), KOJIMA et al (1997), WHITE et al (1999), WU et al (2001), WHITE & BRANTLEY (2003), PRIKRYL et al (2003) BRODT (1985) prediz ainda que a razão de dissolução depende da razão V/A (onde V é o volume da solução e A, a área superficial do mineral). De acordo com os autores, se o volume da solução percolante aumentar, a ponto da quantidade de CO 2 consumido durante a dissolução for insuficiente para mudar sua concentração, então a superfície de reação ou o transporte de massa determinarão a razão de dissolução.…”

Section: +unclassified

Alteração experimental de rochas carbonáticas, Caverna das Pérolas, Iporanga (SP)

et al. 2010

View full text Add to dashboard Cite

Trabalhos experimentais foram realizados com o intuito de estudar a alteração química em rochas carbonáticas provenientes da Caverna das Pérolas, Município de Iporanga, Estado de São Paulo. Extratores soxhlet foram utilizados para acelerar o processo de lixiviação de duas formas: contínua e intermitente. A solução de lixiviação obtida no ensaio contínuo foi analisada quimicamente no final do período de lixiviação (cerca de 454 horas), enquanto os precipitados foram separados e analisados mineralogicamente por difração de raios X (DRX). No ensaio de alteração intermitente, as soluções foram recolhidas após períodos pré-determinados e analisados quimicamente junto com os precipitados, para determinar o total de íons remobilizados da rocha alterada. A composição química das rochas alteradas experimentalmente também foi analisada e comparada com a da rocha sã, a partir das frações molares de seus constituintes maiores. Verificou-se que os principais íons lixiviados no início do processo de alteração foram Na+ e Mg2+; no entanto, com o aumento da alteração química, os íons Sr2+, Ba2+ e Ca2+ passaram a ser, juntamente com o Na+, os íons mais remobilizados, dando início também à precipitação de calcita. Observou-se que no experimento contínuo as concentrações de Sr2+ e Ba2+ ficaram inferiores em relação ao experimento intermitente, revelando que esses íons possivelmente co-precipitaram com a calcita. A baixa razão Mg/Ca pode ter promovido a precipitação preferencial da calcita, em relação à aragonita, nas soluções de alteração experimental. Verificou-se que houve maior taxa de remobilização dos constituintes da rocha carbonática na zona em que as amostras foram submetidas a flutuações do nível freático no compartimento do soxhlet. Entre os minerais secundários observados na rocha alterada, destaca-se a caulinita.

show abstract

“…The strongest advantage of mineral sequestration [5][6][7][8] is that the hazardous greenhouse gas is converted into innocuous, stable and environmental benign carbonate mineral, fixing the carbon dioxide definitively. Its weakest points are the low speed of the reaction, the carbonate by-product that is produced and should be managed, and the costs of the process [9,10].…”

Section: Introductionmentioning

confidence: 99%

Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Morales‐Flórez

Santos

Lemus

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

a b s t r a c tProcesses of carbonation of calcium-rich aqueous industrial wastes from acetylene production were performed mimicking rock weathering, using the atmospheric carbon dioxide as reactant. This residue was carbonated exposing it to the air in artificial pools with controlled solid-to-liquid and surface-tovolume ratios, and the efficiency of this simple mineral carbonation process was maximized. Considering realistic values of just one acetylene production plant, the intelligent handling of the calcium-rich waste would make it possible to counteract the emission of around 800 t of carbon dioxide per year, so the CO 2 emissions of the acetylene production could be completely compensated and its carbon footprint significantly reduced.X-ray diffraction patterns and thermogravimetric analyses reported the conversion, up to 88%, of the calcium hydroxide into calcium carbonate under atmospheric conditions. So, considering a realistic industrial scale-up, 476 kg of CO 2 could be captured with 1 t of dry waste. The morphology of the grains is resolved by electron microscopy, and can be described as needles 15 nm wide and 200 nm long arranged in grains smaller than 1 micron. We exploit these nanometric textural parameters (nanometric pores and particles having a specific surface area ∼50 m 2 /g) to design an efficient carbon fixation procedure. The aim of this work is to propose this simple carbonation technology, based on aqueous alkaline industrial waste, as a contribution to reducing global CO 2 emissions.

show abstract

Feasibility of CO₂ Fixation via Artificial Rock Weathering

Cited by 63 publications

References 7 publications

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

Alteração experimental de rochas carbonáticas, Caverna das Pérolas, Iporanga (SP)

Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Contact Info

Product

Resources

About

Feasibility of CO2 Fixation via Artificial Rock Weathering

Cited by 63 publications

References 7 publications

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

Alteração experimental de rochas carbonáticas, Caverna das Pérolas, Iporanga (SP)

Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Contact Info

Product

Resources

About

Feasibility of CO₂ Fixation via Artificial Rock Weathering