The influence of particle residence time distribution on the reactivity in fluidized bed reactors

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
52 Downloads (Pure)

Abstract

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.
Original languageUndefined
Pages (from-to)2243-2261
Number of pages19
JournalChemical engineering science
Volume49
Issue number14
DOIs
Publication statusPublished - 1994

Keywords

  • METIS-106060
  • IR-11233

Cite this

@article{1641eaea5d874cf3b0d512ffb13794a1,
title = "The influence of particle residence time distribution on the reactivity in fluidized bed reactors",
abstract = "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.",
keywords = "METIS-106060, IR-11233",
author = "Heesink, {Albertus B.M.} and J. Klaus and {van Swaaij}, {Willibrordus Petrus Maria}",
year = "1994",
doi = "10.1016/0009-2509(94)E0044-Q",
language = "Undefined",
volume = "49",
pages = "2243--2261",
journal = "Chemical engineering science",
issn = "0009-2509",
publisher = "Elsevier",
number = "14",

}

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 journalArticleAcademicpeer-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 -