Carbon dioxide use in beneficiation of landfilled coal ash for hazardous waste immobilization

Zhu, Kaize; Matalkah, Faris; Ramli, Salina; Durkin, Brian; Soroushian, Parviz; Balachandra, Anagi M.

doi:10.1016/j.jece.2018.03.003

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…reported a method to treat coal ash with CO 2 for hazardous immobilization. [165] When raw materials are mechanically processed into hydraulic cement in an environment rich in CO 2 , the interaction between CO 2 and the Ca or Mg compounds found in coal ash from landfills results in the formation of solid carbonates. In this process, the absorption of CO 2 can exceed 10 % of the solid's weight, particularly when the mechanical processing occurs with a small percentage of moisture relative to the solid's weight.…”

Section: Reduce Heavy Metal Pollution In Waste Ashesmentioning

confidence: 99%

“…Zhu at al. reported a method to treat coal ash with CO 2 for hazardous immobilization [165] . When raw materials are mechanically processed into hydraulic cement in an environment rich in CO 2 , the interaction between CO 2 and the Ca or Mg compounds found in coal ash from landfills results in the formation of solid carbonates.…”

Section: Potential Applications and Significancementioning

confidence: 99%

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Harnessing Ash for Sustainable CO₂Absorption: Current Strategies and Future Prospects

Wu,

Zhang,

Wang

et al. 2024

Chemistry An Asian Journal

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This review explores the potential of using different types of ash, namely fly ash, biomass ash, and coal ash etc., as mediums for CO2 capture and sequestration. The diverse origins of these ash types—municipal waste, organic biomass, and coal combustion—impart unique physicochemical properties that influence their suitability and efficiency in CO2 absorption. This review first discusses the environmental and economic implications of using ash wastes, emphasizing the reduction in landfill usage and the transformation of waste into value‐added products. Then the chemical/physical treatments of ash wastes and their inherent capabilities in binding or reacting with CO2 are introduced, along with current methodologies utilize these ashes for CO2 sequestration, including mineral carbonation and direct air capture techniques. The application of using ash wastes for CO2 capture are highlighted, followed by the discussion regarding challenges associated with ash‐based CO2 absorption approach. Finally, the article projects into the future, proposing innovative approaches and technological advancements needed to enhance the efficacy of ash in combating the increasing CO2 levels. By providing a comprehensive analysis of current strategies and envisioning future prospects, this review aims to contribute to the field of sustainable CO2 absorption and environmental management.

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Section: Reduce Heavy Metal Pollution In Waste Ashesmentioning

confidence: 99%

Section: Potential Applications and Significancementioning

confidence: 99%

Harnessing Ash for Sustainable CO₂Absorption: Current Strategies and Future Prospects

Wu,

Zhang,

Wang

et al. 2024

Chemistry An Asian Journal

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“…Circulating fluidized bed fly ash (CFB-FA), acted as a unusual fly ash, usually did not have the reactivity at room temperature, which need high-temperature calcination to promote the reactivity and add alkaliactivator or cement to reduce the curing temperature [4]. CFB-FA is a solid particle formed by the process of decomposition, sintering, melting and cooling of the coal.…”

Section: Introductionmentioning

confidence: 99%

Durability evaluation of circulating fluidized bed fly ash-based geopolymer

Li¹,

Zhou

2021

E3S Web Conf.

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To make full use of the circulating fluidized bed fly (CFB-FA), rich-water carbide slag was used as alkali-activator to promote the hydration of CFB-FA and prepare circulating fluidized bed fly-based geopolymer (CFB-FAG). The fundamental properties, mechanical properties, and acid alkali-resistance of CFB-FAG were investigated. The optimum content of CFB-FA is 25%. it indicates that CFB-FA can prepare the excellent properties of geopolymer without high-temperature heat treatment. The alkali resistance of CFB-FAG is better than that of acid resistance. Furthermore, the fatigue lifetime of CFB-FAG decreases by 20% after acid treatment. The achievement can help us make full use of the solid waste and achieve the goal of peak carbon dioxide emissions and carbon neutral.

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Advances in Characterization of Carbonation Behavior in Slag-Based Concrete Using Nanotomography

Mehdizadeh¹,

Vessalas²,

山本³

et al. 2023

Lecture Notes in Civil Engineering

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Exposure of concrete to the atmosphere causes absorption of CO2 and carbonation via a chemical reaction between the CO2 and calcium hydroxide and calcium-silicate-hydrate reaction products inside the concrete. A greater understanding of carbonation behavior and its micro- and nanoscale impacts is needed to predict and model concrete durability, cracking potential and steel depassivation behaviors. New and sophisticated techniques have emerged to analyze the microstructural behavior of concrete subjected to carbonation. High-resolution full-field X-ray imaging is providing new insights to nanoscale behavior. Full-field nano-images provide significant insight into 3D structural identification and mapping. Nanotomographic modeling of an accelerated carbonated test specimen can also provide a 3D view of the pore structure that resides inside slag-based concrete. This is critical for better understanding of the capillary porosity and pore solution behaviors of concrete in situ. We investigated the analysis of durability properties, including the carbonation behavior of slag-based concrete, by evaluating microstructural and nanotomographic identification techniques.

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Carbon dioxide use in beneficiation of landfilled coal ash for hazardous waste immobilization

Cited by 5 publications

References 23 publications

Harnessing Ash for Sustainable CO₂Absorption: Current Strategies and Future Prospects

Harnessing Ash for Sustainable CO₂Absorption: Current Strategies and Future Prospects

Durability evaluation of circulating fluidized bed fly ash-based geopolymer

Advances in Characterization of Carbonation Behavior in Slag-Based Concrete Using Nanotomography

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Carbon dioxide use in beneficiation of landfilled coal ash for hazardous waste immobilization

Cited by 5 publications

References 23 publications

Harnessing Ash for Sustainable CO2Absorption: Current Strategies and Future Prospects

Harnessing Ash for Sustainable CO2Absorption: Current Strategies and Future Prospects

Durability evaluation of circulating fluidized bed fly ash-based geopolymer

Advances in Characterization of Carbonation Behavior in Slag-Based Concrete Using Nanotomography

Contact Info

Product

Resources

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Harnessing Ash for Sustainable CO₂Absorption: Current Strategies and Future Prospects

Harnessing Ash for Sustainable CO₂Absorption: Current Strategies and Future Prospects