Fundamental mechanical properties of ground switchgrass for quality assessment of pellets

Karamchandani, Apoorva; Yi, Hojae; Puri, Virendra M.

doi:10.1016/j.powtec.2015.04.069

Cited by 24 publications

(12 citation statements)

References 17 publications

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“…Finer particle sizes generally correspond with greater pellet strength and durability as larger particles serve as fissure points (MacBain R., 1966). Based on our previous studies (Karamchandani A. et al, 2015(Karamchandani A. et al, , 2016a, the pellet qualities were not significantly different for the two screen sizes, i.e., 3.175 mm and 6.35 mm. There is a trade-off between the energy required to produce finer particles, i.e., time and cost of grinding and the properties of pellets.…”

Section: Introductionmentioning

confidence: 74%

“…et al, 2006). Pretreatment of biomass improves both its physical and chemical properties and makes the material easier to densify by facilitating the activation of natural binders for promoting better bond formation (Kaliyan N. and Morey R.V., 2010;Karamchandani A. et al, 2015;Mani S. et al, 2006;Stelte W. et al, 2011).…”

Section: Test Materialsmentioning

confidence: 99%

“…Moisture content level of 17.5 % (w.b.) was considered for conditioning of ground switchgrass (Karamchandani A. et al, 2015(Karamchandani A. et al, , 2016b(Karamchandani A. et al, , 2016a. Switchgrass samples were conditioned in one batch of 25 g by adding required water and mixing with a manual MiniInversina (Bioengineering AG, Switzerland) that is capable of giving 360° motion (Karamchandani A. et al, 2015(Karamchandani A. et al, , 2016b.…”

Section: Test Materialsmentioning

confidence: 99%

“…2012;Colley Z. et al, 2006;Kaliyan N. and Morey R.V., 2009b;Karamchandani A. et al, 2015Karamchandani A. et al, , 2016aMani S. et al, 2003;Mani S. et al, 2004Mani S. et al, , 2006Poddar S. et al, 2014;Tumuluru J.S. et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…However, the optimum range of moisture content for pelletizing ground switchgrass, without adding any binders, has been reported to be between 17.5 % and 20 % (w.b.) (Karamchandani A. et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Micromechanical Characterization of Particle-Particle Bond in Biomass Assemblies Formed at Different Applied Pressure and Temperature

Karamchandani

Puri

2019

KONA

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During biomass pelletization, the presence of activated natural binders is thought to promote the formation of solid bridges in a biomass assembly. To examine this hypothesis, bonded particles were extracted from the switchgrass compacts formed at different pressure and temperature. This study investigated the influence of these two factors on the resistance to dislocation of the particle-particle bond. The generated force-bond dislocation curves were used to calculate the slope from no load to failure from the assemblies formed at the treatments A (60 MPa and 75 °C), B (100 MPa at 75 °C), C (60 MPa and 90 °C), and D (100 MPa at 90 °C). Assemblies from the treatment B had the highest diametral tensile strength (60.9 ± 7.1 kPa) and densities (653.2 kg m -3 ), whereas, assemblies formed from the treatment C had the lowest diametral strength (7.2 ± 1.4 kPa). The resistance to dislocation of particle-particle bonds at microscale was linearly correlated to the strength (R 2 =0.838) and density (R 2 =0.981) of the densified assemblies. High pressures are documented to form stronger compacts. However, the presence of sufficient moisture at low temperature can significantly improve the densified assembly properties by lowering the glass transition temperature of lignin to form stronger bonds.

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Section: Introductionmentioning

confidence: 74%

Section: Test Materialsmentioning

confidence: 99%