Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 2243-2261 |
| Number of pages | 19 |
| Journal | Chemical engineering science |
| Volume | 49 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 1994 |
Keywords
- METIS-106060
- IR-11233
Cite this
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The influence of particle residence time distribution on the reactivity in fluidized bed reactors. / Heesink, Albertus B.M.; Klaus, J.; van Swaaij, Willibrordus Petrus Maria.
In: Chemical engineering science, Vol. 49, No. 14, 1994, p. 2243-2261.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - The influence of particle residence time distribution on the reactivity in fluidized bed reactors
AU - Heesink, Albertus B.M.
AU - Klaus, J.
AU - van Swaaij, Willibrordus Petrus Maria
PY - 1994
Y1 - 1994
N2 - The influence of particle residence time distribution on the average conversion rate (or reactivity) of particles undergoing a non-catalytic gas-solid reaction inside a continuously operated fluidized bed reactor is evaluated. A so called ß-factor is defined as the ratio of the actual reactivity in the reactor and the reactivity of a batch of particles that react under similar circumstances and that all have a conversion extent equal to the average conversion extent in the reactor. The ß-factor concept is elaborated for shrinking core conversion behaviour. According to Heesink et al. (1993), three extreme types of conversion behaviour are distinguished: core reaction limitation, product-layer diffusion limitation and grain reaction limitation. For each type of behaviour a mathematical function is derived that expresses ß as function of average particle conversion, maximum attainable conversion (with regard to pore plugging) and a new-defined expansion factor, which is a measure for the expansion (or shrinking) of the reacting solid during conversion. These functions can be easily incorporated in fluidized bed reactor models.
AB - The influence of particle residence time distribution on the average conversion rate (or reactivity) of particles undergoing a non-catalytic gas-solid reaction inside a continuously operated fluidized bed reactor is evaluated. A so called ß-factor is defined as the ratio of the actual reactivity in the reactor and the reactivity of a batch of particles that react under similar circumstances and that all have a conversion extent equal to the average conversion extent in the reactor. The ß-factor concept is elaborated for shrinking core conversion behaviour. According to Heesink et al. (1993), three extreme types of conversion behaviour are distinguished: core reaction limitation, product-layer diffusion limitation and grain reaction limitation. For each type of behaviour a mathematical function is derived that expresses ß as function of average particle conversion, maximum attainable conversion (with regard to pore plugging) and a new-defined expansion factor, which is a measure for the expansion (or shrinking) of the reacting solid during conversion. These functions can be easily incorporated in fluidized bed reactor models.
KW - METIS-106060
KW - IR-11233
U2 - 10.1016/0009-2509(94)E0044-Q
DO - 10.1016/0009-2509(94)E0044-Q
M3 - Article
VL - 49
SP - 2243
EP - 2261
JO - Chemical engineering science
JF - Chemical engineering science
SN - 0009-2509
IS - 14
ER -