Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30172
Kinetic model and Simulation Analysis for Propane Dehydrogenation in an Industrial Moving Bed Reactor

Authors: Chin S. Y., Radzi, S. N. R., Maharon, I. H., Shafawi, M. A.

Abstract:

A kinetic model for propane dehydrogenation in an industrial moving bed reactor is developed based on the reported reaction scheme. The kinetic parameters and activity constant are fine tuned with several sets of balanced plant data. Plant data at different operating conditions is applied to validate the model and the results show a good agreement between the model predictions and plant observations in terms of the amount of main product, propylene produced. The simulation analysis of key variables such as inlet temperature of each reactor (Tinrx) and hydrogen to total hydrocarbon ratio (H2/THC) affecting process performance is performed to identify the operating condition to maximize the production of propylene. Within the range of operating conditions applied in the present studies, the operating condition to maximize the propylene production at the same weighted average inlet temperature (WAIT) is ΔTinrx1= -2, ΔTinrx2= +1, ΔTinrx3= +1 , ΔTinrx4= +2 and ΔH2/THC= -0.02. Under this condition, the surplus propylene produced is 7.07 tons/day as compared with base case.

Keywords: kinetic model, dehydrogenation, simulation, modeling, propane

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331023

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3711

References:


[1] D. Sanfilippo, and I. Miracca, Dehydrogenation of Paraffins: Synergies between CatalystbDesign and Reactor Engineering, Catalysis Today, 111, 2006, 133-139.
[2] H. F. Rase, Handbook of Commercial Catalysts: Heterogeneous Catalysts. CRC Press, New York, 2000.
[3] L. C. Loc, N. A. Gaidai, S. L. Kiperman and H. S. Thoang, Kinetics of propane and n-butane Dehydrogenation over Platinum-Alumina Catalysts in the presence of Hydrogen and Water Vapor. Kinetics and Catalysis, 37(6), 1996, 851-857.
[4] A. Rosjorde, S. Kjelstrupa, E. Johannessena, R. Hansenb, Minimizing the Entropy Production in a Chemical Process for Dehydrogenation of Propane, Energy, 32, 2007, 335-343.
[5] M. P. Lobera, C. Tellez, J. Herguido and M. Menendez, Transient Kinetic Modelling of Propane Dehydrogenation over a Pt-Sn-K/Al2O3 Catalyst, Applied Catalysis A: General, 349, 2008, 156-164.
[6] M. P. Lobera, C. Tellez, J. Herguido and M. Menendez, Propane Dehydrogenation over Pt Sn K/╬│-Al2O3 Catalyst in a Two-Zon Fluidized Bed Reactor, Ind. Eng. Chem. Res. 47, 2008, 9314-9320.
[7] M.M. Bhasin, J.H. McCain, B.V. Vora, T. Imai and P.R. Pujado, Dehydrogenation and Oxydehydrogenation of Paraffins to Olefins, Applied Catalysis A: General, 221, 2001, 397-419.
[8] P. Pujado and B. Vora, 1990. Hydr. Proc., 65, 1990.
[9] http://www.uop.com/gasprocessing/TechSheets/Oleflex.pdf.
[10] F. Cavani, and F. Trifiro, 1994. Skillful Matching of Chemistry and Engineering in Catalytic Dehydration of Low-Molecular-Weight Alkanes, La Chimica & L-Industria, 76, 1994.