Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation

Santos, Andressa dos; Ajbary, Mohamed; Morales‐Flórez, Víctor; Kherbeche, Abdelhak; Piñero, Manuel; Esquivias, L.

doi:10.1016/j.jhazmat.2009.03.026

Cited by 49 publications

(34 citation statements)

References 25 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This SiO 2 rim apparently hindered the diffusion of Ca 2+ -ions from the particle interior, resulting in a declining reaction rate. Hence, Ca 2+ -ions leaching rate, probably determined by diffusion through the Ca-depleted silicate rim, rather than by the boundary layer at the solid-liquid interface, seems to be the main rate-limiting step in aqueous carbonation (O'Connor et al, 2002;Huijgen et al, 2005c;Santos et al, 2009).…”

Section: Reaction Kinetics Leaching Of Metallic Ions From Solid Matrixmentioning

confidence: 99%

“…According to a report by Park and Fan (2004), the optimum pH for aqueous carbonation is around 10, while the dissolution of BOF slag occurs under low pH conditions. The pH decreases continuously as carbonation proceeds due to CO 2 dissolution into solution (Santos et al, 2009). There is no change in pH after the carbonation is completed.…”

Section: Performance Evaluationmentioning

confidence: 99%

See 1 more Smart Citation

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

Pan

Chang

Chiang

2012

Aerosol Air Qual. Res.

330

193

View full text Add to dashboard Cite

CO 2 capture, utilization, and storage (CCUS) is a promising technology wherein CO 2 is captured and stored in solid form for further utilization instead of being released into the atmosphere in high concentrations. Under this framework, a new process called accelerated carbonation has been widely researched and developed. In this process, alkaline materials are reacted with high-purity CO 2 in the presence of moisture to accelerate the reaction to a timescale of a few minutes or hours. The feedstock for accelerated carbonation includes natural silicate-minerals (e.g., wollastonite, serpentine, and olivine) and industrial residues (e.g., steelmaking slag, municipal solid waste incinerator (MSWI) ash, and air pollution control (APC) residues). This research article focuses on carbonation technologies that use industrial alkaline wastes, such as steelmaking slags and metalworking wastewater. The carbonation of alkaline solid waste has been shown to be an effective way to capture CO 2 and to eliminate the contents of Ca(OH) 2 in solid residues, thus improving the durability of concrete blended with the carbonated residues. However, the operating conditions must be further studied for both the economic viability of the technology and the optimal conditions for CO 2 reaction.

show abstract

Section: Reaction Kinetics Leaching Of Metallic Ions From Solid Matrixmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

Pan

Chang

Chiang

2012

Aerosol Air Qual. Res.

330

193

View full text Add to dashboard Cite

show abstract

“…In addition, the synthesis procedure is extremely simple, as it does not involve any complicated chemical or physical treatment, only stirring or centrifuging. So, the energy consumption of this procedure is very low in comparison with other proposed technologies [4,16,17].…”

Section: Co 2 Sequestration By Reusing Phosphogypsum and Aluminum-ricmentioning

confidence: 98%

Technological Proposals for Recycling Industrial Wastes for Environmental Applications

et al. 2014

View full text Add to dashboard Cite

A two-fold objective is proposed for this research: removing hazardous and unpleasant wastes and mitigating the emissions of green house gasses in the atmosphere. Thus, the first aim of this work is to identify, characterize and recycle industrial wastes with high contents of calcium or sodium. This involves synthesizing materials with the ability for CO 2 sequestration as preliminary work for designing industrial processes, which involve a reduction of CO 2 emissions. In this regard, phosphogypsum from the fertilizer industry and liquid wastes from the green olive and bauxite industries have been considered as precursors. Following a very simple procedure, Ca-bearing phosphogypsum wastes are mixed with Na-bearing liquid wastes in order to obtain a harmless liquid phase and an active solid phase, which may act as a carbon sequestration agent. In this way, wastes, which are unable to fix CO 2 by themselves, can be successfully turned into effective CO 2 sinks. The CO 2 sequestration efficiency and the CO 2 fixation power of the procedure based on these wastes are assessed. OPEN ACCESSMinerals 2014, 4 747

show abstract

“…This facilitates dissolution and, furthermore, the "passivating layer" caused by the surface precipitation of secondary phases such as carbonates or silica is avoided [23,24]. Additionally, comminution or other pre-treatments to increase kinetics and efficiency through the microstructure may not be necessary, as many wastes are produced with a particle size suitable for rapid and efficient carbonation [25−27].…”

Section: Introductionmentioning

confidence: 99%

New method for carbon dioxide mineralization based on phosphogypsum and aluminium-rich industrial wastes resulting in valuable carbonated by-products

Romero-Hermida

Santos

Pérez‐López

et al. 2017

Journal of CO2 Utilization

Self Cite

View full text Add to dashboard Cite

A new carbon mineralization method was designed based on a sequestration agent synthesised exclusively from industrial wastes. Phosphogypsum waste from the fertiliser industry was dissolved into caustic aqueous waste from the aluminium anodising industry. The resulting precipitate consisted of katoite (Ca 3 Al 2 (OH) 12 , a Si-free hydrogrossular solid solution end-member of the Al-containing hydrogarnet) and thenardite (Na 2 SO 4 );the latter easily removed by rinsing with water. The carbonation performance of this katoite-rich sequestration agent was evaluated using two different methods: by bubbling in aqueous media, and by weathering. Both procedures yielded high carbonation efficiencies (80% and 100%, respectively), and resulted in a solid precipitate composed primarily of calcite (CaCO 3 ) and aluminium hydroxide (Al(OH) 3 ). Priority attention was given to the transfer of trace elements and radionuclides of the uranium series typically present in the phosphogypsum. Results confirmed that the traces were transferred to resulting final solid carbonate at concentrations similar to those present in the raw phosphogypsum. In conclusion, these carbonated minerals would trap substantial amounts of CO 2 and produce final materials with similar civil engineering uses to those proposed for current phosphogypsum wastes. This work offers new methods for jointly manage specific industrial wastes oriented to more sustainable industrial processes and to control CO 2 emissions.

show abstract

Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation

Cited by 49 publications

References 25 publications

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

Technological Proposals for Recycling Industrial Wastes for Environmental Applications

New method for carbon dioxide mineralization based on phosphogypsum and aluminium-rich industrial wastes resulting in valuable carbonated by-products

Contact Info

Product

Resources

About