Synergistic effects and mechanism of the ternary flux system Fe2O3-CaO-MgO on the coal ash slag fluidity

Wu, Hao; Wang, Jiajian; Liu, Xia; Cao, Xi; Guo, Qinghua; Yu, Guangsuo

doi:10.1016/j.fuel.2023.127963

Cited by 5 publications

(2 citation statements)

References 35 publications

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“…Wu et al identified a synergistic effect of the Fe 2 O 3 –CaO–MgO ternary system, resulting in lowering the fusion temperature of coal ash slag, and highlighted the impact of the ratio of the different oxides on the ferrites formation mechanisms. 58 In this study, the low levels of CO 2 sorption capacity with Mg and Fe ratios of 0.5 and 0.3 could be explained by the lack of enough Fe 2 O 3 to perform the synergistic swing.…”

Section: Resultsmentioning

confidence: 60%

Reversible sorption of carbon dioxide in Ca–Mg–Fe systems for thermochemical energy storage applications

Desage,

Humphries,

Paskevicius

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 60%

Reversible sorption of carbon dioxide in Ca–Mg–Fe systems for thermochemical energy storage applications

Desage,

Humphries,

Paskevicius

et al. 2024

J. Mater. Chem. A

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“…The results displayed that the crystal mineral species changed from tabular spars to pyroxene and boltonite, and the crystalline phase morphology gradually changed from rod-like and sheet-like to sphere-like with the increasing content of MgO from 1.1% to 7.5%. Yu et al found that a CaO/MgO mass ratio of 4/6 could largely limit the crystallization behavior and decrease the critical viscosity temperature as CaO and MgO are the dominant basic oxides in ash. The underlying reason was that Mg 2+ ions played like a network modifier participating actively in the crystallization process .…”

Section: Cao-mgo Compositional Agent On Coal Ash Flowabilitymentioning

confidence: 99%

A Mini-review of the Capability of Calcium-Based Binary Fluxing in Adjusting Coal Ash Flowability

Shi,

Wu,

Bai

et al. 2023

Energy Fuels

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Coal ash flowability determines whether the coal ash slag can be successfully discharged from entrained flow gasifiers, to a large extent. Traditional single CaO fluxing cannot perform well enough to meet the requirement of slagging gasifiers for the flowability of coal ash with extremely high SiO2 and Al2O3. Thus, this work reviewed the effect of Ca-bearing binary (CaO-Fe2O3, CaO-Na2O, and CaO-MgO) fluxing on ash flowability. The effect of CaO-Fe2O3 binary fluxing on ash flowability has been systemically investigated, while studies concerning CaO-Na2O and CaO/MgO on coal ash flowability were limited. CaO-Fe2O3 binary fluxing performs well in adjusting the AFTs and viscosity behavior. The CaO/Fe2O3 fluxing mass ratio of 1/1 was recommended within the compromise of AFTs and viscosity at operating temperature. CaO-Na2O also displayed good performance to decrease AFTs, but strong volatilization of Na species brings difficulty to quantify the influence of CaO-Na2O compositional fluxing. CaO-MgO compositional fluxing showed a synergistic effect at controlling both AFTs and viscosity, while the addition of CaO-MgO fluxing easily led to a crystallization slag pattern. Besides, the value of CaO/MgO corresponding to the best fluxing performance and fluidity performance was unrevealed, as well as CaO/Na2O. The exploration of CaO-Na2O and CaO/MgO in the industry needs further testimony in coal ash with bad flowability. In a comprehensive comparison, CaO/Fe2O3 binary fluxing is the most promising compositional flux in adjusting the coal ash flowability. The review can give guiding information for selecting high-efficiency fluxing compositional fluxing.

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Synergistic effect of coal and biomass gasification and organo-inorganic elemental impact on gasification performance and product gas

Anand,

Kachhap,

Gautam

2023

Energy

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Synergistic effects and mechanism of the ternary flux system Fe2O3-CaO-MgO on the coal ash slag fluidity

Cited by 5 publications

References 35 publications

Reversible sorption of carbon dioxide in Ca–Mg–Fe systems for thermochemical energy storage applications

Reversible sorption of carbon dioxide in Ca–Mg–Fe systems for thermochemical energy storage applications

A Mini-review of the Capability of Calcium-Based Binary Fluxing in Adjusting Coal Ash Flowability

Synergistic effect of coal and biomass gasification and organo-inorganic elemental impact on gasification performance and product gas

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