A comparative study in 3D of bed particle layer characteristics in quartz and K-feldspar from fluidized bed combustion of woody biomass using X-ray microtomography

Bed particle layer and crack characteristics at different ages were studied for quartz K-feldspar bed particles from a 30 MWth bubbling fluidized 90 circulating bed, both using woody biomass as fuel. X-ray microtomography (XMT) was utilized to determine the distribution on particles' surface. For each type, average thickness well volume fractions of layers entire determined three by utilizing XMT analysis. Comparison two types showed that retains thinner in conversion processes compared quartz. Crack observed extensively extent 19.3 vol% 32.1 after 13 days BFB CFB, respectively, which could cause deposition fragments. On contrary, has almost no tendency toward forming layers.