DEM study of the porosity distribution of pellet sandpile formed by ternary size particles

Han, Wei; Ge, Yao; Li, Meng; Li, Ying; Saxén, Henrik; Yu, Yaowei

doi:10.1016/j.powtec.2019.11.017

Cited by 14 publications

(4 citation statements)

References 55 publications

(74 reference statements)

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“…The average particle size of the as-calcined LLZTO–10La 2 O 3 powders is about 0.864 μm with one main Gaussian distribution around 0.5 μm, as shown in Figure b. According to packing theories of particles, − it is difficult for single-sized particles to reach a high packing density. On the contrary, the consecutive particle size distribution is inclined to form a higher packing density because the small size particles fill the interspace among large size particles.…”

Section: Resultsmentioning

confidence: 99%

Oriented Attachment Strategy Toward Enhancing Ionic Conductivity in Garnet-Type Electrolytes for Solid-State Lithium Batteries

Qin

Xie

Meng

et al. 2021

ACS Appl. Mater. Interfaces

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Solid-state lithium batteries (SSLBs) based on garnet-type solid-state electrolytes (SSEs) have attracted much attention due to their high energy density and chemical stability. However, poor room-temperature ionic conductivity and low density of SSEs induced by conventional preparation routes limit their potential future applications. In this work, an oriented attachment strategy is employed to enhance the Li-ion conductivity and density of garnet-type SSE Li6.5La3Zr1.5Ta0.5O12 by introducing La2O3 nanoparticles. The oriented attachment of the ZrO2(Ta2O5) matrix mediates the epitaxial growth of the La–Zr(Ta)–O intermediate phase due to the addition of La2O3 nanoparticles. Continuous Li-ion transport pathways along grain boundaries are produced by the combination of residual La2O3 and gas Li2O. A densification interface is obtained when 10 wt % La2O3 is doped. The maximum value of Li-ion conductivity reaches 8.20 × 10–4 S·cm–1, with a relative density of 97.3%. SSLBs with a LiFePO4 cathode showing a stable cycling performance with a discharge capacity of 123.1 mA·h·g–1 and a Coulombic efficiency of 99.2% after 300 cycles (0.5C) at room temperature. This work is comparable to the state-of-the-art methodology, which provides a feasible approach to creating SSEs with high performances for SSLBs.

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Section: Resultsmentioning

confidence: 99%

Oriented Attachment Strategy Toward Enhancing Ionic Conductivity in Garnet-Type Electrolytes for Solid-State Lithium Batteries

Qin

Xie

Meng

et al. 2021

ACS Appl. Mater. Interfaces

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“…Although these shapes did not resemble blast furnace material shapes, their study pointed out that particle shape plays an important role in the porosity distribution. They later studied packing behavior of pellet [144] and coke [49] in terms of porosity distribution, which is closely linked to permeability. They used spherical particles to model pellet and coke and in both cases and concluded that the porosity distribution obtained from simulations generally matched experimental results.…”

Section: Tablementioning

confidence: 99%

“…As this is a property of the internal structure, it is very difficult to quantify experimentally. Wei et al [143,144] studied porosity distributions of a heap formed during hopper discharge on lab-scale. Measuring beakers were placed under the hopper prior to discharging and the filled beakers were carefully removed after a stable heap was formed, as shown in Fig.…”

Section: Porosity Distributionsmentioning

confidence: 99%

Modelling of phenomena affecting blast furnace burden permeability using the Discrete Element Method (DEM) – A review

et al. 2023

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“…For a fusion energy reactor, the tritium breeder and neutron multiplier pebbles are packed in rectangular [5], U-shaped [6][7][8], or cylindrical vessels in blanket modules [9][10][11]. In addition, pebble packings are also widely used in some other fields, such as 3D-printing processes [12], pellet sandpiles [13], the packing and combustion processes of biomass fuel particles [14], storage of grain particles [15], solar energy storage systems [16], etc. Generally, most applications are often presented as dense-packed or fluidized beds.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Aspect Ratio and Cross-Sectional Area of Rectangular Tubes on Packing Characteristics of Mono-Sized Pebble Beds

et al. 2023

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The packing characteristics of a pebble bed are essential to understand the heat- and mass-transfer processes occurring within a granular system. Therefore, the packing characteristics of rectangular prismatic pebble beds randomly packed with mono-sized pebbles are analyzed. In terms of the average and local packing fraction distribution, coordination number, and radial distribution function, the effects of the rectangular tube aspect ratio and cross-sectional area on the packing properties of pebble beds are explored in depth. The findings indicate that the packing structures of the rectangular pebble bed exhibit noticeable fixed-wall effects. The average packing fraction and coordination number gradually decline as the rectangular tube aspect ratio rises. Close to the fixed wall, a noticeable wall effect can be seen in the distribution of axial and local packing fractions and the pebble center distribution. The wall effect has an increasing effect on the axial and local packing fraction distributions in rectangular tubes with increasing aspect ratios. Additionally, the average packing fraction and the average coordination number also increase as the cross-sectional area increases, indicating a gradual weakening of the wall effect as the cross-sectional area increases. Furthermore, the cross-sectional area and aspect ratio of the rectangular tubes affect the RDF values of the rectangular pebble beds but have no impact on the RDF features. The findings reported in this paper will be helpful for designing and optimizing pebble beds in the breeding blanket of fusion reactors.

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DEM study of the porosity distribution of pellet sandpile formed by ternary size particles

Cited by 14 publications

References 55 publications

Oriented Attachment Strategy Toward Enhancing Ionic Conductivity in Garnet-Type Electrolytes for Solid-State Lithium Batteries

Oriented Attachment Strategy Toward Enhancing Ionic Conductivity in Garnet-Type Electrolytes for Solid-State Lithium Batteries

Modelling of phenomena affecting blast furnace burden permeability using the Discrete Element Method (DEM) – A review

Effects of the Aspect Ratio and Cross-Sectional Area of Rectangular Tubes on Packing Characteristics of Mono-Sized Pebble Beds

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