Energy & Fuels, Vol.25, No.7, 2862-2873, 2011
Dust-Firing of Straw and Additives: Ash Chemistry and Deposition Behavior
In the present work, the ash chemistry and deposition behavior during straw dust-firing were studied by performing experiments in an entrained flow reactor. The effect of using spent bleaching earth (SBE) as an additive in straw combustion was also investigated by comparing with kaolinite. During dust-firing of straw, the large (>similar to 2.5 mu m) fly ash particles generated were primarily molten or partially molten spherical particles rich in K, Si, and Ca, supplemented by Si-rich flake-shaped particles. The smaller fly ash particles (