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Wood Ash Database

– Wood for Energy -

Combustion

Ash distributionHjalmarsson, A., Bjurström, H., Sedendahl, K. Handbok för restprodukter från förbränning. Fjärrvärmeföreningen.

The amount and proportion of different ash types varies depending on which combustion technology or method that is used. Below is a rough example of a few common combustion methods, and their ash output proportions.

Combustion method Bottom ash, % Fly ash, %
Fluid Bed Combustor (FBC) ~10 ~90
Roster 70-80 20-30
Spreader stoker 40-50 50-60
Powder burner 5-20 80-95