Below is a video from Ben at Victory Gasworks and he is calculating the moisture content of his raw material for the gasifier. The test Ben is carrying out is called the dry weight test. In this test the dry weight of the material it taken away from the original weight, the difference is the materials moisture percentage.
Drying Temperature
When conducting a dry weight test the material must be dried at a constant rate, at a relatively low temperature. If you attempt to dry the material at high temperatures more than just moisture will be released from material, and this will give an inaccurate figure for moisture percentage.
Knowing a materials moisture percentage is important for gasification and pellet production. For pellet production the material moisture content is required to be between the ranges of 10-20%. Generally for most materials the best average moisture content for producing pellets is around 15%. This will give a quality pellet with a moisture percentage at around 10%. Therefore conducting a dry weight test on a raw material will indicate if it is suitable for pellet production.
Pellets for Gasification
As Ben explains in the video, moisture content is important for a gasifier to operate properly. Pellets are a high-density fuel with a uniform shape and low moisture content. This makes pellets ideal for gasification as they produce an efficient and predictable burn.
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