2002
DOI: 10.1016/s0032-5910(02)00149-3
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Self-segregation of high-volatile fuel particles during devolatilization in a fluidized bed reactor

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Cited by 95 publications
(70 citation statements)
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“…In tum, the fluidization promotes gas-solid contact, resulting in good mixing, and high heat and mass transfer rates [3,4]. Unlike more traditional reactors for coal combustion or catalytic reactions [5), gasifying biomass poses formidable challenges due to their unique characteristics. Biomass feedstock does not readily fluidize and is subsequently injected in a second inert material, typically refractory sand, to improve the fluidization characteristics.…”
Section: Introductionmentioning
confidence: 99%
“…In tum, the fluidization promotes gas-solid contact, resulting in good mixing, and high heat and mass transfer rates [3,4]. Unlike more traditional reactors for coal combustion or catalytic reactions [5), gasifying biomass poses formidable challenges due to their unique characteristics. Biomass feedstock does not readily fluidize and is subsequently injected in a second inert material, typically refractory sand, to improve the fluidization characteristics.…”
Section: Introductionmentioning
confidence: 99%
“…Such a result can be explained by the fuel particle behavior in the sepiolite bed. The jetsam behavior of the fuel particle ensured that the devolatilization occurred within the dense bed, and thus endogenous bubbles were produced, as explained in [13,14]. These bubbles affect the fluid-dynamic behavior of the entire bed increasing the effective flow rate, and thus, changing the CE distribution.…”
Section: Combustible Behavior: Jetsammentioning
confidence: 97%
“…Fuel particles may have higher densities than the dense phase, showing a jetsam behavior. This causes the formation of endogenous bubbles when devolatilization occurs, changing the properties of the fuel particles, and promoting their motion throughout the whole bed [12][13][14]. In contrast, flotsam fuel particles tend to remain at the top of the bed showing a low mixing degree with the bed particles [15,16].…”
Section: Introductionmentioning
confidence: 99%
“…Since 60 g Ni-based oxygen carrier provides enough oxygen for the complete conversion of gaseous products generated from 2 g sludge, the incomplete conversion of CO and H 2 is not because of the insufficiency of Ni-based oxygen carrier, but should be due to sludge particle segregation [5,37]. In general, fragmentation and segregation of sludge particles during devolatilization and char gasification play a key role in a fluidized bed reactor [37]. In particular, segregation of volatile matter is expected to cause the poor contact between bed materials and volatile matter, which results in incomplete conversion of CO and H 2 in CLC process.…”
Section: Effect Of Ni-based Oxygen Carrier On Sludge Conversionmentioning
confidence: 99%