Assessment of biomass bulk elastic response to consolidation

Ilić, Dušan; Williams, Kenneth C.; Ellis, Derek

doi:10.1016/j.cherd.2018.05.028

Cited by 13 publications

(9 citation statements)

References 16 publications

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“…The discrete element method (DEM) which was introduced by Cundall and Strack (1979) was extended with the parallel bonded particle model (BPM) of Potyondy and Cundall (2004) which appears to be very useful in providing a particle scale insight into the bonding mechanisms. DEM simulations reproduced the results of the experimental tests of the pressure compaction of biomass very well (Ilic et al, 2018), in terms of the mechanical behaviour of pinewood chips in cyclic loading (Xia et al, 2019), durability (Mahajan et al, 2017), and the breakage strength of wood (Horabik et al, 2021) and biomass pellets (Gilvari et al, 2020). DEM modelling of the mechanical behaviour of compacted biomass requires further study in order to verify its applicability to different types of biomass and experimental conditions.…”

Section: Introductionmentioning

confidence: 81%

DEM modeling of wood sawdust compaction and breakage strength of pellets determined in diametral compression test

Horabik¹,

Bańda²,

Vozárová³

et al. 2023

Int. Agrophys.

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A b s t r a c t . Sawdust from six wood species typical of Eastern Europe: beech (Fagus L.), birch (Betula L.), oak (Quercus L.), pine (Pinus sylvestris L.), poplar (Populus L.) and willow (Salix L.) with a moisture content of 8% were compacted at a compressive pressure of 120 MPa in a laboratory mould with a diameter of 10 mm. Diametral compression tests were performed to determine the mechanical strength of the pellets. Discrete element method simulations were performed to reproduce the compaction process and the mechanical reaction of the pellets to diametral compression. It was found that the difference between the bulk density of the compacted and the relaxed pellets decreased with increases in the breakage strength of a pellet. The DEM simulations reproduced well the experimental data of the diametral compression test.K e y w o r d s: sawdust pellets, diametral compression, tensile strength, DEM

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Section: Introductionmentioning

confidence: 81%

DEM modeling of wood sawdust compaction and breakage strength of pellets determined in diametral compression test

Horabik¹,

Bańda²,

Vozárová³

et al. 2023

Int. Agrophys.

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“…The method has been applied in numerous areas of science and technology, including physics [26], pharmaceutical science [27], civil engineering [28], and agricultural engineering [29]. This method is a very promising tool for modelling biomass post-harvest processing, including handling [30][31][32], compaction [33], and testing biomass bulk properties [34]. The DEM extended with the bonded particle model (BPM) considerably broadened the range of applicability of the DEM to model the internal structure and breakage of agglomerates composed of numerous particles [35,36].…”

Section: Introductionmentioning

confidence: 99%

Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling

Horabik¹,

Bańda²,

Józefaciuk³

et al. 2021

Materials

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Wood pellets are an important source of renewable energy. Their mechanical strength is a crucial property. In this study, the tensile strength of pellets made from oak, pine, and birch sawdust with moisture contents of 8% and 20% compacted at 60 and 120 MPa was determined in a diametral compression test. The highest tensile strength was noted for oak and the lowest for birch pellets. For all materials, the tensile strength was the highest for a moisture content of 8% and 120 MPa. All pellets exhibited a ductile breakage mode characterised by a smooth and round stress–deformation relationship without any sudden drops. Discrete element method (DEM) simulations were performed to check for the possibility of numerical reproduction of pelletisation of the sawdust and then of the pellet deformation in the diametral compression test. The pellet breakage process was successfully simulated using the DEM implemented with the bonded particle model. The simulations reproduced the results of laboratory testing well and provided deeper insight into particle–particle bonding mechanisms. Cracks were initiated close to the centre of the pellet and, as the deformation progressed, they further developed in the direction of loading.

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“…It needs noting that in this example, bagasse, and wheat straw have not been pre‐processed while the wattle has been granulated. These results are from a research programme to assess bulk elastic response to consolidation of biomass samples feeding an Australian ligno cellusocic pilot‐scale ethanol plant are from a recent presentation . Briefly, testing was conducted in small cell, typically used for particles below 4 mm.…”

Section: Storage Handling and Transportationmentioning

confidence: 99%

“…Typically, compressibility is assessed in a chamber of known volume with the application of an increasing external compressive load. For biomass feedstocks, it is dilation due to biomass tensile response, rather than compressive load, that is of great significance . Due to springiness/elasticity, biomass is much more difficult to consolidate to critical condition and fail.…”

Section: Identification Of Key Design Parameters For Handling Storagmentioning

confidence: 99%

On the challenges facing the handling of solid biomass feedstocks

Ilić

Williams

Farnish

et al. 2018

Biofuels Bioprod Bioref

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With a major global emphasis on the management of waste, alternative resources and a shift to environmentally sustainable technologies, demand for large volumes of heterogeneous solid biomass feedstocks for energy or chemical use is expected to rise signifi cantly. In transforming a sporadic supply of a low-value, highly variable product, to continuous and controlled high throughput systems, a thorough understanding of the feedstock properties will increase in importance. Appropriate characterisation tests are necessary to defi ne technical specifi cation and selection criteria for handling equipment and to appraise the requirement and location for additional processes or pre-treatment to be integrated into the handling chain. Such tests may also infl uence the material characteristics to be used in the conversion process. This paper discusses the main feedstock attributes associated with a number of handling chain phases and the approach to obtain them. The framework for a holistic approach to the characterisation and design of biomass feedstock handling systems for further development and practical implementation is also proposed.

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Assessment of biomass bulk elastic response to consolidation

Cited by 13 publications

References 16 publications

DEM modeling of wood sawdust compaction and breakage strength of pellets determined in diametral compression test

DEM modeling of wood sawdust compaction and breakage strength of pellets determined in diametral compression test

Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling

On the challenges facing the handling of solid biomass feedstocks

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