Simulation and optimization of a fixed bed reactor operating in coking-regeneration cycles

1992 ◽  
Vol 31 (12) ◽  
pp. 2699-2707 ◽  
Author(s):  
Daniel O. Borio ◽  
M. Menendez ◽  
J. Santamaria
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Simulation And Optimization ◽  
Reactor Operating

scholarly journals Simulation and optimization of coupling reaction of methanol synthesis and isopropyl alcohol dehydrogenation

2018 ◽  
Vol 10 (3) ◽  
pp. 127
Author(s):  
Jenny Rizkiana ◽  
Yogi Wibisono Budhi ◽  
Azis Trianto
Keyword(s):  
Methanol Synthesis ◽  
Isopropyl Alcohol ◽  
Fixed Bed ◽  
Coupling Reaction ◽  
Fixed Bed Reactor ◽  
Inlet Temperature ◽  
Simulation And Optimization ◽  
Optimum Operation ◽  
Operation Conditions ◽  
Reaction Conversion

A study on simulation and optimization of coupling reaction between methanol synthesis and isopropyl alcohol (IPA) dehydrogenation was performed. The analysis is carried out theoretically to obtain the optimum operation conditions which give the best performance. The reactions are just interacting thermally. In this study, both reactions are held catalytically in a heat-exchanger type reactor. As a high pressure reaction, methanol synthesis is placed in the inner side of reactor tube while dehydrogenation of IPA is in the opposite. Tube wall acts as a heat transfer media. The reactor is modeled by a steady state heterogeneous equation for a fixed bed reactor. Optimization is done in order to find the optimum value of operation conditions, those are the inlet temperature of both side of reactor and the molar feed flow ratio between the exothermic side and the endothermic side. Sum of weighted reaction conversion is considered to be the objective function that is maximized. The simulation result shows that coupled reactor makes the reaction conversion higher than a conventional adiabatic reactor and the optimum operation conditions give the maximum value of the conversion. This study presents a theoretical proof that coupling reaction is feasible. Keywords: coupling reaction, IPA dehydrogenation, methanol synthesis, optimization, simulated annealingAbstrak Telaah mengenai simulasi dan optimisasi reaksi perangkaian (coupling reaction) antara sintesis metanol dengan dehidrogenasi isopropil alkohol (IPA) telah dilakukan. Analisis dilaksanakan secara teoretik guna mendapatkan kondisi optimum yang akan memberikan hasil terbaik. Pada penelitian ini, kedua reaksi dilaksanakan secara katalitik dalam reaktor bertipe buluh-cangkang. Karena bertekanan tinggi, sintesis metanol ditempatkan pada sisi buluh, sedangkan dehidrogenasi IPA ditempatkan pada sisi cangkang. Dinding buluh berperan sebagai media perpindahan panas. Reaktor dimodelkan dengan reaktor heterogen tunak unggun tetap. Optimisasi dilakukan dalam rangka mendapatkan nilai optimum dari kondisi operasi yang mencakup temperatur inlet sisi eksotermik dan endotermik serta rasio umpan molarnya. Jumlah total konversi reaksi terbobotkan dipilih sebagai nilai objectif yang akan dioptimumkan. Hasil simulasi menunjukkan bahwa reaktor perangkaian termal mampu meningkatkan konversi reaksi jika dibandingkan dengan reaktor adiabatik dan pada kondisi operasi yang optimum diperoleh konversi maksimal. Penelitian ini menunjukkan bahwa reaksi perangkaian layak untuk dilaksanakan.Kata kunci: reaksi perangkaian, dehidrogenasi IPA, sintesis methanol, optimisasi, simulated annealing

scholarly journals When catalyst meets reactor: continuous biphasic processing of xylan to furfural over GaUSY/Amberlyst-36

2015 ◽  
Vol 5 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Christof Aellig ◽  
David Scholz ◽  
Pierre Y. Dapsens ◽  
Cecilia Mondelli ◽  
Javier Pérez-Ramírez
Keyword(s):  
Catalytic System ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Continuous Mode ◽  
Selective Conversion ◽  
Reactor Operating

A highly intensified process for the selective conversion of hemicellulose to furfural is demonstrated which integrates a bifunctional catalytic system into a biphasic fixed-bed reactor operating in continuous mode.

Simulation and Optimization of Methanol Transformation into Hydrocarbons in an Isothermal Fixed-Bed Reactor under Reaction−Regeneration Cycles

1998 ◽  
Vol 37 (6) ◽  
pp. 2383-2390 ◽  
Author(s):  
Marta Castilla ◽  
Ana G. Gayubo ◽  
Andrés T. Aguayo ◽  
José M. Arandes ◽  
Javier Bilbao
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Simulation And Optimization

Modeling and Simulation of a Packed-bed Reactor for Carrying out the Water-Gas Shift Reaction

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Yaidelin A. Manrique ◽  
Carlos V. Miguel ◽  
Diogo Mendes ◽  
Adelio Mendes ◽  
Luis M. Madeira
Keyword(s):  
Fixed Bed ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Fixed Bed Reactor ◽  
Water Gas Shift ◽  
Small Scale ◽  
Heterogeneous Model ◽  
Co Conversion ◽  
Reactor Operating ◽  
Water Gas

Abstract In this work the water-gas shift (WGS) process was addressed, with particular emphasis in the development of phenomenological models that can reproduce experimental results in a WGS reactor operating at low temperatures. It was simulated the conversion obtained in a fixed-bed reactor (PBR) packed with a Cu-based catalyst making use of a composed kinetic equation in which the Langmuir-Hinshelwood rate model was used for the lowest temperature range (up to 215 ºC), while for temperatures in the range 215 – 300 ºC a redox model was employed. Several packed-bed reactor models were then proposed, all of them without any fitting parameters. After comparing the simulations against experimental CO conversion data for different temperatures and space time values, it was concluded that the heterogeneous model comprising axial dispersion and mass transfer resistances shows the best fitting. This model revealed also good adherence to other experiments employing different feed compositions (CO and H2O contents); it predicts also the overall trend of increasing CO conversion with the total pressure. This modeling work is particularly important for small scale applications related with hydrogen production/purification for fuel cells.

Hydrogen Production via Low Temperature Water Gas Shift Reaction: Kinetic Study, Mathematical Modeling, Simulation and Optimization of Catalytic Fixed Bed Reactor using gPROMS

2017 ◽  
Vol 12 (3) ◽  
Author(s):  
Davood Mohammady Maklavany ◽  
Ahmad Shariati ◽  
Mohammad Reza Khosravi-Nikou ◽  
Behrooz Roozbehani
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Water Gas Shift ◽  
Optimal Controls ◽  
Water Gas Shift Reaction ◽  
Hydrogen Formation ◽  
Simulation And Optimization ◽  
Modeling Simulation ◽  
Shift Reaction ◽  
Water Gas

Abstract The kinetics study, modeling, simulation and optimization of water gas shift reaction were performed in a catalytic fixed bed reactor. The renowned empirical power law rate model was used as rate equation and fitted to experimental data to estimate the kinetics parameters using gPROMS. A good fit between predicted and experimental CO conversion data was obtained. The validity of the kinetic model was then checked by simulation of plug flow reactor which shows a good agreement between experimental and predicted values of the reaction rate. Subsequently, considering axial dispersion, a homogeneous model was developed for simulation of the water-gas shift reactor. The simulation results were also validated by checking the pressure drop of the reactor as well as the mass concentration at equilibrium. Finally, a multi-objective optimization was conducted for water-gas shift reaction in order to maximize hydrogen formation and carbon monoxide conversion, whereas the reactor volume to be minimized. Implementation of optimal controls leads to increase in hydrogen formation at reactor outlet up to 25.55 %.

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