Simulation of catalyst loss from an industrial fluidized bed reactor on the basis of labscale attrition tests

Thon, Andreas; Püttmann, Anja; Hartge, Ernst‐Ulrich; Heinrich, Stefan; Werther, Joachim; Patience, Gregory S.; Bockrath, Richard E.

doi:10.1016/j.powtec.2011.07.017

Cited by 22 publications

(7 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…), fluidization conditions (gas velocity, pressure, temperature, density, humidity, etc. ), and fluidized‐bed structure parameters (orifice number and diameter for multi‐orifice distributor plates) …”

Section: Introductionmentioning

confidence: 99%

Particle size effect on the catalyst attrition in a lab‐scale fluidized bed

2016

AIChE Journal

View full text Add to dashboard Cite

Catalysts readily suffer from particle attrition in fluidized beds. In this article, a commercial fluid catalytic cracking catalyst was sieved into several particle‐size intervals to investigate the size effect on particle attrition. It is shown that an exponential decay equation presents a suitable description of attrition and that catalyst attrition is dependent on particle size. Steady‐state specific attrition rate decreases with increasing particle size; however, initial specific attrition rate and decay time parameter change irregularly. For comparison of attrition resistances, a long attrition test is required to reach steady‐state attrition, and the steady‐state specific attrition rate is recommended. It is seen that the smallest particle‐size interval is the most seriously attrited, while the two largest particle‐size intervals are the most attrition‐resistant. Furthermore, weak interactions appear among attrition behaviors of different intervals, and a linear combination method is effective to combine all interval samples to predict the attrition of the original full‐sized sample. © 2016 American Institute of Chemical Engineers AIChE J, 63: 914–920, 2017

show abstract

Section: Introductionmentioning

confidence: 99%

Particle size effect on the catalyst attrition in a lab‐scale fluidized bed

2016

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…The solids load of the gas flow is defined as: (39) A general verification of the aforementioned procedure for the prediction of attrition in fluidized bed processes with data from industrial plants is often difficult because operational parameters and detailed process design are usually considered proprietary. However, just recently this procedure has been applied to DuPont's process for maleic anhydride production [19]. A comparison of the predicted values with measured values of catalyst loss in the industrial process showed a general agreement.…”

Section: Kramp Et Al / the Role Of Attrition And Solids Recovery Imentioning

confidence: 74%

“…First the solids conversion is defined as: (19) Reactions are assumed to take place in the suspension phase of the bottom zone and the freeboard where reactant gas and Oxygen Carrier particles contact each other. The heterogeneous reactions are calculated according to a shrinking core model [9].…”

Section: Reactionsmentioning

confidence: 99%

The Role of Attrition and Solids Recovery in a Chemical Looping Combustion Process

Kramp

Thon

Hartge

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Résumé -Effet de l'attrition et de la récupération des particules dans le procédé de combustion en boucle chimique -Le présent travail propose un modèle de simulation en continu du procédé de combustion en boucle chimique constitué de deux lits fluidisés interconnectés. Les simulations ont été conduites à deux échelles 50 kWth correspondant à une installation pilote et 100 MWth correspondant à une installation industrielle. Un modèle décrivant l'attrition, établi à partir d'expériences conduites à petite échelle au laboratoire, a été utilisé pour étudier l'évolution de la granulométrie et des pertes aux cyclones des particules transportant l'oxygène dans le procédé. Des débits de circulation de particules réalistes sont calculés par simulations et les pertes aux cyclones peuvent être quantifiées. Rapportées à la puissance de l'installation, les pertes en particules aux cyclones sont plus élevées à l'échelle industrielle qu'à l'échelle pilote. Il a également été observé qu'à l'échelle industrielle on obtient une conversion plus faible de la charge gazeuse dans le réacteur fioul à cause du by-pass induit par les bulles dans ce réacteur. Sur la base des simulations, il n'est donc pas garanti que les performances soient identiques à l'échelle pilote et à l'échelle industrielle à cause de l'hydrodynamique. Avec le simulateur, il est également possible d'étudier l'impact du système de récupération des particules dans les effluents gazeux sur les pertes. La répartition des pertes entre le réacteur air et le réacteur fioul est étudiée avec différentes configurations. Il est, par exemple, montré que l'ajout d'un deuxième étage de cyclone en sortie du réacteur air permet de réduire significativement les pertes en matériau transporteur d'oxygène. Solids volume concentration at minimum fluidization condition (-) C Local reactant gas concentration (mol m -3 ) Abstract -The Role of Attrition and Solids Recovery in a Chemical Looping Combustion Process

show abstract

“…Looking back Prof. Werther's academic career, it can be found that his research interests include measuring techniques for multiphase (mainly gas-solid) flow systems [1][2][3][4][5][6][7][8], fluidized bed combustion characteristics of sewage sludge and coal [9][10][11][12][13][14][15][16][17], particle attrition in fluidized-bed systems [18][19][20][21][22][23][24][25][26][27], gas and solid mixing behavior in fluidizedbed reactors [28][29][30][31][32][33][34][35][36][37], modeling of industrial/large-scale fluidized-bed reactors [38][39][40][41][42][43][44], flowsheet simulation of solids processes [45][46][47][48]…”

Section: Introductionmentioning

confidence: 99%

“…Looking back Prof. Werther's academic career, it can be found that his research interests include measuring techniques for multiphase (mainly gas‐solid) flow systems 1–8, fluidized bed combustion characteristics of sewage sludge and coal 9–17, particle attrition in fluidized‐bed systems 18–27, gas and solid mixing behavior in fluidized‐bed reactors 28–37, modeling of industrial/large‐scale fluidized‐bed reactors 38–44, flowsheet simulation of solids processes 45–51, and more recently, chemical looping processes 52–58. From all his research work, it can be seen that Prof. Werther always pays attention to the scaling effect (non‐uniform/maldistribution) in fluidized bed reactors.…”

Section: Introductionmentioning

confidence: 99%

Modeling Study on Non‐Uniform Lateral Distribution in Large‐Scale Circulating Fluidized Bed Boilers

Deng

Zhang

et al. 2022

Chemie Ingenieur Technik

View full text Add to dashboard Cite

Ing. Joachim Werther on the occasion of his 80th birthdayWith the development of the circulating fluidized bed (CFB) combustion technology, the cross-sectional area of the boiler furnace increases gradually, making the lateral non-uniform distribution in the furnace more prominent. To investigate the flow field inhomogeneity in the furnace, a two-dimensional mass balance model was established in this work, and the lateral solid concentration deviation was adopted to evaluate the degree of the flow field inhomogeneity. Afterwards, the effect of four factors on the lateral non-uniform distribution was examined. It turned out that the lateral profile of the primary air flow rate had a much greater influence than that of the coal feeding rate.

show abstract

Simulation of catalyst loss from an industrial fluidized bed reactor on the basis of labscale attrition tests

Cited by 22 publications

References 12 publications

Particle size effect on the catalyst attrition in a lab‐scale fluidized bed

Particle size effect on the catalyst attrition in a lab‐scale fluidized bed

The Role of Attrition and Solids Recovery in a Chemical Looping Combustion Process

Modeling Study on Non‐Uniform Lateral Distribution in Large‐Scale Circulating Fluidized Bed Boilers

Contact Info

Product

Resources

About