Meta-study on the effect of P2O5 on single phase slag viscosity and the effect of P2O5 induced liquid phase immiscibility on dispersion viscosity

Guhl, Stefan; Körner, Justyna; Laabs, Marcel; Bai, Jin; Meyer, Bernd

doi:10.1016/j.fuel.2021.121501

Cited by 8 publications

(4 citation statements)

References 47 publications

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“…Acidic oxides generally only play the role of increasing structural complexity in slag. Therefore, SiO 2 and P 2 O 5 [ 117 , 118 , 119 , 120 ] will directly cause the viscosity of the slag to increase, while the role of amphoteric oxides will have different effects on the fluidity of slag according to changes in relative composition and temperature. Figure 2 c shows that the influence of Al 2 O 3 on the viscosity of slag is obviously different under different composition conditions [ 121 ].…”

Section: The Properties Of Molten Slagmentioning

confidence: 99%

“… ( a ) The viscosity–temperature curve of slag ([ 110 , 111 ]); ( b ) the evolution of melting point with different compositions ([ 10 , 112 , 113 ]); ( c ) the variation of viscosity with different content ([ 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 131 ]); ( d ) the evolution of sulfur capacity with different contents ([ 126 , 127 , 128 , 130 , 131 ]). …”

Section: The Properties Of Molten Slagmentioning

confidence: 99%

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Developments in Atomistic and Nano Structure Evolution Mechanisms of Molten Slag Using Atomistic Simulation Methods

Jiang,

Li,

et al. 2024

Nanomaterials

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Molten slag has different properties depending on its composition. The relationship between its composition, structure, and properties has been the focus of attention in industrial manufacturing processes. This review describes the atomistic scale mechanisms by which oxides of different compositions affect the properties and structure of slag, and depicts the current state of research in the atomic simulation of molten slag. At present, the research on the macroscopic properties of molten slag mainly focuses on viscosity, free-running temperature, melting point, and desulphurization capacity. Regulating the composition has become the most direct and effective way to control slag properties. Analysis of the microevolution mechanism is the fundamental way to grasp the macroscopic properties. The microstructural evolution mechanism, especially at the atomic and nanoscale of molten slag, is reviewed from three aspects: basic oxides, acidic oxides, and amphoteric oxides. The evolution of macroscopic properties is analyzed in depth through the evolution of the atomic structure. Resolution of the macroscopic properties of molten slag by the atomic structure plays a crucial role in the development of fundamental theories of physicochemistry.

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Section: The Properties Of Molten Slagmentioning

confidence: 99%

Section: The Properties Of Molten Slagmentioning

confidence: 99%

Developments in Atomistic and Nano Structure Evolution Mechanisms of Molten Slag Using Atomistic Simulation Methods

Jiang,

Li,

et al. 2024

Nanomaterials

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“…For example, the ratio of acidic to basic oxides ratio (A/B) and Si/Al ratio are common parameters for chemical composition analysis of coal ash, and many proportional parameters for Ca have been put forward to discuss the influence of CaO in coal ash system in depth. 12 Ge et al 13,14 investigated the influence of CaO/Na 2 O and CaO/Fe 2 O 3 on the viscosity of slag under the condition of entrained flow gasification. They concluded that the decrease in the CaO/Na 2 O concentration improved NBO proportion in slag, the polymerization degree of slag and the viscosity, and converted slag type from crystalline slag to glassy slag, while the reduction in the CaO/Fe 2 O 3 ratio resulted in the disruption of Si-O-Si bridges and the reduced Al (IV) proportion, which weakened the polymerization degree and reduced the viscosity of slag.…”

Section: Introductionmentioning

confidence: 99%

Performance of minerals and crystallization properties of synthetic slags with various CaO/MgO in slagging gasifiers

Wang

Liu

Raheem

et al. 2022

Asia-Pacific J Chem Eng

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The fluidity of coal ash slag at high temperatures is an important factor that determines its applicability and operating conditions in entrained flow gasification. In this study, six synthetic slags with different CaO/MgO rations were prepared to study their effect on slag fluidity. The results showed that the flow temperature of slags decreased first and then increased with the decrease of CaO/MgO ratio. When the slag had a high or low CaO/MgO ratio, or when the contents of CaO and MgO in the slag were similar, the homogeneous slag showed a lower viscosity. The crystallization tendency of Ca was stronger than that of Mg. During cooling, slags with high or low CaO/MgO ratio showed obvious crystallization tendency, and formation of crystals would lead to a sharp increase in slag viscosity, so that the temperature of critical viscosity of slags decreased first and then increased with the decrease of CaO/MgO ratio.

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“…Ash chemical composition of raw materials : A/B, acid-base ratio (A/B = (Al 2 O 3 + SiO 2 + TiO 2 + P 2 O 5 )/(Na 2 O + K 2 O + MgO + CaO + Fe 2 O 3 )) 38. …”

mentioning

confidence: 99%

Study on the fluidity of ash slag of liquefaction solid product and lignite co‐gasification

Wang

Liu

Guo

et al. 2021

Asia-Pacific J Chem Eng

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The utilization of liquefaction solid product (LSP) obtained from fluidization reaction pyrolysis has become a pressing obstacle limiting the industrialization of coal liquefaction technology. In this work, gasification of LSP and Hami lignite coal (LC) and their blend at different ratios was investigated. In addition, the melt flow, mineral transformation, and crystallization behavior in the fusion process and cooling process were investigated. The results show that both LSP and LC are typical crystalline slags and cannot be applied to entrained flow gasification alone. The co-gasification of LC and LSP is a feasible method to improve their fluidity. At the ratio of 2:1 (LC to LSP), the blend has the lowest AFT. For molten slag, viscosity of the sample corresponded well to the structure of the slag. LC1:2LSP with higher Q 2 and Q 3 content showed a high viscosity, while LC1:2LSP with higher Q 0 and Q 1 content showed a lower viscosity. Besides, the size of the crystals generated during cooling is inversely proportional to the high-temperature viscosity of the sample, the migration of ions became difficult, and the growth of crystal size was inhibited at high viscosity. Meanwhile, the slag type of samples was influenced by the precipitated crystals. T cv can be effectively reduced by blending LC with LSP in a certain proportion. The results provide a theoretical basis for the utilization of LSP for the operation of entrained flow gasification.

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Meta-study on the effect of P2O5 on single phase slag viscosity and the effect of P2O5 induced liquid phase immiscibility on dispersion viscosity

Cited by 8 publications

References 47 publications

Developments in Atomistic and Nano Structure Evolution Mechanisms of Molten Slag Using Atomistic Simulation Methods

Developments in Atomistic and Nano Structure Evolution Mechanisms of Molten Slag Using Atomistic Simulation Methods

Performance of minerals and crystallization properties of synthetic slags with various CaO/MgO in slagging gasifiers

Study on the fluidity of ash slag of liquefaction solid product and lignite co‐gasification

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