Investigation of Ash Deposition Rates for a Suite of Biomass Fuels and Fuel Blends

This investigation details the effects of the fuel constituents through systematic experimental and theoretical analysis of a suite of fuels with widely varying inorganic contents and compositions. The experiments were carried out in the multifuel flow reactor (MFR) at Brigham Young University. Fuels included straw, grain screenings, sawdust, sunflower shells, sugar beat pulp, and shea nutshells. Out of the six major fuels, two base fuels (straw and grain screenings) were mixed with the other four fuels in 1:1 ratio by weight. The data from a series of experiments quantitatively illustrated the effects of fuel properties and fuel interactions on ash deposition rate. In the deposition rate measurement investigation, the predicted results from a simple model of ash deposition assuming “no interactions” between fuels were compared with the measured results to demonstrate the fuel interactions. A significant decrease in ash deposition rate was observed for fuels blends in comparison with that of pure fuels (s...

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