Strength of briquettes and pellets from energy crops
2016
Swietochowski, A., Warsaw Univ. of Life Sciences (Poland) | Lisowski, A., Warsaw Univ. of Life Sciences (Poland) | Dabrowska-Salwin, M., Warsaw Univ. of Life Sciences (Poland)
The plant materials are characterized by a variety of chemical compounds containing both organic and inorganic of simple and complex chains. The variety of materials and their variability during the comp action process is causing difficulties in defining the intermolecular forces which have arisen as a result of sufficient approximation of the particles. Whereas the internal forces have a direct effect on the strength properties of the agglomerates. The study used biomass from willow, Miscanthus, and Virginia mallow. Laboratory tests were conducted according to the developed program, in the range that allows to estimate the effect of the factors on the mechanical properties of the produced pellets and briquettes. Plant species (3 species), the way of deformation of formed fuel (shear, compression, bending) and form of solid fuel (briquettes, pellets) and their interactions double and triple in most cases proved to be statistically significant differences of the strength values. From the analysis of the mean values of strength parameters of Duncan’s test it shows that plants did not survive reproducibility of their rankings between these parameters and methods and deformation took a different order for medium strength parameters. The average values of penetration resistance, elasticity modulus, maximum stress and the specific energy of deformation were however clearly lower for briquettes than pellets.
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