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Simulation of an industrial fixed-bed reactor with cocurrent downflow for hydrogenation of PYGAS

Paper ID Volume ID Publish Year Pages File Format Full-Text
54407 47008 2014 11 PDF Available
Title
Simulation of an industrial fixed-bed reactor with cocurrent downflow for hydrogenation of PYGAS
Abstract

•The simulation results agreement 0.8 AARD with respect to plant data.•The SRK EoS with mixing rule of PA-RE-SimSci is recommended to get the VLE.•Thermodynamic model may, or not, improving the results depending on the choice.•The most of assumptions were confirmed calculating the suitable dimensionless number.•The solubility of hydrogen in PYGAS depends on both temperature and liquid density.

A fixed-bed Reactor with cocurrent downflow operating in downward bubble flow regime for hydrogenation of pyrolysis gasoline (PYGAS) has been simulated. In order to model the reactor, suitable thermodynamic, hydrodynamic and reaction models were solved simultaneously. A set of ten hydrogenation reaction kinetics was considered, taking into account a cut of hydrocarbons C5–C11. It was demonstrated the importance of how the choice of a specific thermodynamic model may, or not, improve the results obtained, and how this may affect the prediction of the system. The use of Soave–Redlich–Kwong equation of state with the mixing rule of Panagiotopoulo-Reid modified by SimSci is the recommendation made to represent the vapor-liquid-equilibrium, reporting 3.4% AARD (average absolute relative deviation) in the hydrogen solubility in PYGAS. The model predicts the steady state conditions and it is validated by comparing the results with actual plant data under the following operating conditions: Tinlet = 366 K, Pinlet = 5.03 MPa, and (<0.001) molar of styrene in the reactor effluent. From simulation results, it is compared the predictions of the model with actual plant data, finding a good agreement between both, and showing AARD of 0.8% in the temperature profile and 9% in the composition of reactor effluent between ours results and the plant data.

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Keywords
PYGAS; Fixed-bed reactor; Bubble flow; Simulation; Hydrogenation
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Simulation of an industrial fixed-bed reactor with cocurrent downflow for hydrogenation of PYGAS
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volumes 220–222, March 2014, Pages 237–247
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us