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Bulk Density


Bulk density is defined as the mass of many particles of a material divided by the total volume they occupy. This total volume will include the volume of the particles, the inter-particle void volume, and the internal pore volume. The bulk density is an important parameter for fuel deliveries on volume basis, and together with the net calorific value, it determines the energy density. It also facilitates the estimation of space requirements for transport and storage.

At Celignis we determine the bulk density of biomass according to ISO standard 17828 (2015). We use a 5 litre container (certified according to EN 10204-3.1) into which the biomass sample (powder, chips etc.) is poured from a fixed height. The container is then subjected to a defined shock exposure. This leads to a volume reduction through the settling of the material. The container is then refilled so that its whole volume is occupied and any surplus material beyond the boundary of the top of the container is removed by using a scantling. The filled container is then weighed and the weight of the container subtracted from this value to give the total weight of the biomass. The bulk density (kg/m3), on an as-received basis, is then calculated by dividing this weight by the internal volume of the container.

If you would like to determine the bulk density on a dry basis, please select an analysis package to determine the moisture content of the sample, and then we can use this to as a correction factor to be applied to the as-received bulk density.

Click here to place an order for determining Bulk Density.





Analysis Packages for Bulk Density

The Celignis Analysis Package(s) that determine this constituent are listed below:

P53   Bulk Density
Bulk Density

Further Details


Additional Material

We can determine the Bulk Density content of biomass, click here to learn more about our various biomass analysis methods.

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