Optimizing the compression/briquetting of fibrous agricultural materials

Faborode, M.O.; O’Callaghan, J.R.

doi:10.1016/0021-8634(87)90092-8

Cited by 37 publications

(21 citation statements)

References 13 publications

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“…The particles retain their properties and elastic deformation mainly occurs during this phase (Cooper & Eaton, 1962). In the next stage, with increasing applied pressure, most of the air is removed from the particulate mass and elasticeplastic deformation of particles occurs (Cooper & Eaton, 1962;Faborode & O'Callaghan, 1989, 1987Kaliyan & Morey, 2009;Mani et al, 2002;Nona, Lenaerts, Kayacan, & Saeys, 2014). Previous research has developed pressure-density equations to describe the compression characteristics of some metal or non-metallic powders (Cooper & Eaton, 1962;Heckel, 1961;Jones, 1960;Panelli & Filho, 2001;Walker, 1923).…”

Section: Introductionmentioning

confidence: 96%

“…In general, the densification of materials requires two stages to take place: particle rearrangement and deformation (Faborode & O'Callaghan, 1989, 1987Kaliyan & Morey, 2009;Mani, Tabil, & Sokhansanj, 2002). In the first stage, particles rearrange bringing themselves closer together and reducing voids; little stress is needed to overcome interparticle and particle-to-wall friction (Mani, Tabil, & Sokhansanj, 2003).…”

Section: Introductionmentioning

confidence: 97%

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Compression and relaxation properties of selected biomass for briquetting

Guo

Wang

Tabil

et al. 2016

Biosystems Engineering

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Compression and relaxation properties of selected biomass for briquetting

Guo

Wang

Tabil

et al. 2016

Biosystems Engineering

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“…In fluid dynamics, internal friction is associated with viscosity, whereas in fibrous materials such as straw, sliding friction related to the movement (displacement) of individual stems inside a layer (Faborode and O'Callaghan 1987) as well as stem damage, leaf and spike crushing have to be taken into account in addition to the deformation of individual straw stems (O'Dogherty et al 1995). The losses (excluding the first incomplete cycle) are minimized in successive strain cycles (Fig.…”

Section: Internal Frictionmentioning

confidence: 99%

Rheological properties of a straw layer

Myhan

Jachimczyk

2014

Rheol Acta

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The experiment was performed on a layer of straw whose thickness was equivalent to the load of 4 kg m −2 . Every straw sample was subjected to 15 strain cycles. A preliminary analysis of the results revealed that compression and decompression curves resemble the proper rational function, where selected parameters of that function were determined by the direction of strain and the number of strain cycles. Straw was described with the use of a rheological model where it was divided into layers subjected to elastic strain and internal friction proportional to the rate of displacement and deformation. Unknown model parameters were estimated based on an analysis of the equation describing the results of the experiment and the results produced by the model simulating the rheological properties of straw. The elastic modulus was directly proportional to load, and its value decreased in successive strain cycles. Internal friction was determined based on the loss of mechanical energy. In fluid dynamics, internal friction is associated with viscosity, whereas in fibrous materials such as straw, mechanical energy is lost mainly due to sliding friction. The losses were minimized in successive strain cycles.

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“…Mewes (1959) showed that roughly 40% of the total applied energy was used to compress the materials (straw and hay) and the remaining 60% was used to overcome friction. Faborode and O'Callaghan (1987) studied the energy requirement for compression of fibrous agricultural materials. They reported that chopped barley straw at 8.3% (wb) moisture content consumed 28-31 MJ/t of energy, while un-chopped material consumed 18-27 MJ/t.…”

Section: Specific Energy For Compaction and Extrusion Of Pelletmentioning

confidence: 99%