A comparison of homogeneous and heterogeneous dynamic models for industrial methanol reactors in the presence of catalyst deactivation

Rezaie, N.; Jahanmiri, A.; Moghtaderi, Behdad; Rahimpour, Mohammad Reza

doi:10.1016/j.cep.2004.10.004

Cited by 112 publications

(85 citation statements)

References 13 publications

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“…In this simple model, it is assumed that gradients of temperature and concentrations between the phases can be ignored and the equations for the two phases can be combined [5]. The general fluid-phase balance is a model where the balances typically account for accumulation, convection, and reaction.…”

Section: Reactor Modelmentioning

confidence: 99%

Incorporation of Dynamic Flexibility in the Design of a Methanol Synthesis Loop in the Presence of Catalyst Deactivation

2007

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A typical methanol loop reactor is analyzed in this study. All basic equipment in the Lurgi-type methanol loop is included in the proposed model. A detailed dynamic model described by a set of ordinary differential and algebraic equations is developed to predict the behavior of the overall process. The model is validated against plant data. A new deactivation model is proposed and its parameters are estimated using daily plant data. The interesting feature of this model is that it incorporates the effect of carbon dioxide and carbon monoxide on the catalyst deactivation. Using the model, the effect of various factors to compensate for the reduction of production rate due to catalyst deactivation has been examined. Some improvements can be achieved by adjusting the operating conditions. Finally, a strategy is proposed for prevention of reduced production due to catalyst deactivation.

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Section: Reactor Modelmentioning

confidence: 99%

Incorporation of Dynamic Flexibility in the Design of a Methanol Synthesis Loop in the Presence of Catalyst Deactivation

2007

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“…The dynamic behavior of the methanol reaction arises from catalyst deactivation as a fundamental phenomenon, which occurs due to sintering. Simulation investigations could include dynamic simulation studies [5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Radial‐Flow, Spherical‐Bed Reactor Concept for Methanol Synthesis in the Presence of Catalyst Deactivation

2008

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A radial-flow, spherical-bed reactor concept for methanol synthesis in the presence of catalyst deactivation, has been proposed. This reactor configuration visualizes the concentration and temperature distribution inside a radial-flow packed bed with a novel design for improving reactor performance with lower pressure drop. The dynamic simulation of spherical multi-stage reactors has been studied in the presence of long-term catalyst deactivation. Model equations were solved by the orthogonal collocation method. The performance of the spherical multi-stage reactors was compared with a conventional single-type tubular reactor. The results show that for this case study and with similar reactor specifications and operating conditions, the two-stage spherical reactor is better than other alternatives such as single-stage spherical, three-stage spherical and conventional tubular reactors. By increasing the number of stages of a spherical reactor, one increases the quality of production and decreases the quantity of production.

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“…Several published papers have approached the development of computational tools for methanol synthesis on an industrial scale [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The majority of the papers focus on the analysis of the reactor, providing models for simulation and operational optimization [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…The majority of the papers focus on the analysis of the reactor, providing models for simulation and operational optimization [1][2][3][4][5][6][7][8][9][10][11]. The decision variables of the optimization problem are related to the temperature profile along the reactor.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Methanol Synthesis Loops with Quench Reactors

Santangelo¹,

Ahón²,

Costa³

2008

Chem Eng & Technol

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An optimization procedure for increasing the methanol production in synthesis loops with quench reactors is presented. The process decision variables are represented by a set of split fractions of the reactor feed to the catalyst beds. The optimization routine is coupled to a steady-state model of the methanol synthesis loop. Numerical results illustrate the performance of the proposed optimization procedure, presenting an example, where a considerable increase in methanol production can be reached after the application of the optimization procedure.

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A comparison of homogeneous and heterogeneous dynamic models for industrial methanol reactors in the presence of catalyst deactivation

Cited by 112 publications

References 13 publications

Incorporation of Dynamic Flexibility in the Design of a Methanol Synthesis Loop in the Presence of Catalyst Deactivation

Incorporation of Dynamic Flexibility in the Design of a Methanol Synthesis Loop in the Presence of Catalyst Deactivation

A Novel Radial‐Flow, Spherical‐Bed Reactor Concept for Methanol Synthesis in the Presence of Catalyst Deactivation

Optimization of Methanol Synthesis Loops with Quench Reactors

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