Simulation of a Large-Scale FCC Riser Using a Combination of MP-PIC and Four-Lump Oil-Cracking Kinetic Models

Berrouk, Abdallah S.; Pornsilph, C.; Bale, Shivkumar; Du, Yiqing; Nandakumar, K.

doi:10.1021/acs.energyfuels.6b03380

Cited by 40 publications

(17 citation statements)

References 33 publications

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“…The MP-PIC method was implemented to the simulations of multiphase and thermal reacting flows in fluidized bed (Li et al, 2013;Berrouk et al, 2017;Xie et al, 2017). This approach has been utilized in several cold flow modeling studies including bubbling fluidized beds (Weber et al, 2013;Liang et al 2014;Fotovat et al, 2015), risers of CFB's (Chen et al, 2013;Shi et al, 2014;Shi et al, 2015a;Shi et al, 2015b;Wang et al, 2015) and full loop CFB systems (Wang et al, 2014;Tu and Wang, 2018).…”

Section: Introductionmentioning

confidence: 99%

Cold Flow Simulation of a 30 kWth CFB Riser with CPFD

Raheem

Yılmaz

Özdoĝan

2020

JAFM

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A 30 kWth Circulating fluidized bed (CFB) combustor is experimentally and numerically investigated under cold flow conditions. Barracuda software based on Computational Particle Fluid Dynamics (CPFD) method is utilized for simulations. The influences of bed inventory and drag model on flow hydrodynamics were investigated considering pressure and velocity profiles and particle concentration. Two advanced drag models, namely Energy minimization multi-scale (EMMS) and Wen-Yu/Ergun were selected for this study. The simulations were performed with initial bed material masses of 3.79, 4.55 and 5.20 kg corresponding to 2.5, 3 and 3.5 diameters height of riser, respectively. With increasing bed inventory pressure drops and solid concentration increase. The axial particle velocities slightly change with bed inventory. The comparison of simulation results with experimental measurements was resulted in good agreement (<5%) with both models. The simulation with EMMS drag model predicted the pressure profiles more accurately than Wen-Yu/Ergun drag model. The profiles of particle volume fraction and axial velocity demonstrate that core-annulus flow pattern was captured by both models. But EMMS drag model was better in revealing the meso-scale structures at instantaneous particle concentration distribution. Moreover, the influence of particle size distribution on particle volume fraction and particle velocity profiles is also investigated with two drag models.

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Section: Introductionmentioning

confidence: 99%

Cold Flow Simulation of a 30 kWth CFB Riser with CPFD

Raheem

Yılmaz

Özdoĝan

2020

JAFM

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“…In mathematics, only when r ( c c ) is a linear function of c c , the value of ∫ p ( c c ) r ( c c ) dc c equals

r ((), \overset{false¯}{c_{c}})

. However, in real commercial processes, including FCC and MTO, the relation between r ( c c ) and c c is highly nonlinear. Hence, the coke distribution becomes important for correctly describing the reaction behavior of a population of catalyst particles in fluidized bed reactor–regenerator system.…”

Section: Introductionmentioning

confidence: 99%

Study of Catalyst Coke Distribution Based on Population Balance Theory: Application to Methanol to Olefins Process

Yuan

Gao

et al. 2019

AIChE Journal

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A coke distribution model of catalyst particles in three‐dimensional space was developed based on population balance theory, and an analytic expression of coke distribution for zero‐dimensional time‐independent problem was deduced. The expression shows that the coke distribution is determined by the average catalyst residence time, coke deposition (or burning) rate, and coke distribution of catalyst inflow. The coke distribution model was further applied to the methanol to olefins (MTO) process. The critical factors influencing coke distribution in MTO process, as well as the effect of coke distribution on product selectivity, were investigated. Three scales of MTO fluidized bed reactor–regenerator systems, i.e., pilot‐scale, demonstration‐scale and commercial‐scale with the reactor diameter of 0.261, 1.25, and 10.5 m, respectively, were simulated. The simulated results were in good agreement with the operation data. The model could be helpful in the operation optimization and reactor design. © 2018 American Institute of Chemical Engineers AIChE J, 65: 1149–1161, 2019

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“…The increased computational efficiency makes it suitable for large‐scale FRB simulations. The MP‐PIC approach has been recently applied to the simulation of large‐scale fluidized catalytic cracking (FCC), biomass‐sand fluidized bed, biomass‐steam gasification, etc. Therefore, the MP‐PIC methodology is suitable for the simulation of industrial processes due to the enhanced computational efficiency.…”

Section: Introductionmentioning

confidence: 99%

Study of the coke distribution in MTO fluidized bed reactor with MP‐PIC approach

Yuan

et al. 2018

Can J Chem Eng

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The methanol to olefins (MTO) process has received considerable interest due to its importance in transforming abundant resources such as coal, natural gas, and biomass to widely‐demanded light olefins. In the MTO process, the coke deposited on the catalyst governs the catalyst activity and product selectivity, and thus is critical to the reaction behaviour. In the industrial processes, the residence time and coke content of catalyst particles in the reactor show a certain distribution due to the continuous outflow of spent catalyst and inflow of regenerated catalyst, which need further attention. The multi‐phase particle‐in‐cell (MP‐PIC) approach was used in the current work to simulate the catalyst residence time and coke content distribution. The effect of gas‐solid flow patterns, reactor structure, and average catalyst residence time on the residence time and coke content distribution was investigated. It was found that at high superficial velocities, the coke content distributions obtained with the MP‐PIC method are consistent with the distribution deduced from the ideally mixed flow assumption of catalyst particles. The results suggested that it is possible to simulate large‐scale MTO reactors by use of the coke distribution. In particular, by incorporating an initial coke distribution, the time needed to reach steady state in the MTO reactor simulations could be greatly reduced.

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Simulation of a Large-Scale FCC Riser Using a Combination of MP-PIC and Four-Lump Oil-Cracking Kinetic Models

Cited by 40 publications

References 33 publications

Cold Flow Simulation of a 30 kWth CFB Riser with CPFD

Cold Flow Simulation of a 30 kWth CFB Riser with CPFD

Study of Catalyst Coke Distribution Based on Population Balance Theory: Application to Methanol to Olefins Process

Study of the coke distribution in MTO fluidized bed reactor with MP‐PIC approach

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