Title:
Warren-Spring Based Model for the Cohesion and the Yield Locus of Cohesive Biomass Powders
Author(s):
Vanneste-Ibarcq, C., Melkior, T., de Ryck, A.
Document(s):
Paper
Slide presentation
Abstract:
The objective of this work is to determine the cohesion and the yield locus of cohesive biomass powders from simple measures, to assess their flowability. Two characterization methods have been used. First, the shear test, which leads to the powder yield locus. It has been performed in the Freeman Tech FT4 shear cell with thirty-three different powders (mainly wood, other biomasses and inorganic powders). Parameters such as the cohesion (Y-Intercept) can be derived from this test. A Warren-Spring model based method to describe non-linear yield loci is proposed. The second characterization method is the measure of the avalanche angle in a rotating drum. Relations have been found between the parameters derived from the shear test (cohesion, tensile stress, and Warren-Spring index), the avalanche angle and the aerated density. Finally, a model is proposed for the evaluation of the cohesion and the yield locus of biomass powders, using only two easy to measure parameters: avalanche angle and aerated density. This model has been validated for preconsolidation stresses ranging in between 2 and 5 kPa.
Keywords:
biomass, sawdust, storage, wood, powder, flowability
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Production and Supply of Solid Biofuels
Event:
25th European Biomass Conference and Exhibition
Session:
2CO.13.3
Pages:
506 - 511
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-2CO.13.3
Price:
FREE
