Comparison of Reactors for Prediction of Kinetics for a Reaction
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- Category: Science
- Date Submitted: 10/07/2016 09:59 AM
- Pages: 13
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Comparison of reactors for prediction of kinetics for a reaction
Abstract
In this report, a Matlab model for simulating simultaneous oxidation of carbon monoxide and propylene in a fixed bed reactor. The model takes into account temperature variation and pressure drop down the reactor. The catalyst pellets are assumed to be isothermal; only the concentration variation is considered inside the pellet. Both external and internal diffusion is taken into account in the model. The results are then analyzed and some problems are noted. Then a new model is simulated to eliminate those problems. Also, a simpler isothermal case is also simulated for relative study.
Introduction
The reaction kinetics is one of the most important part of how we conduct our experiments. The setup for a slow reaction, which may take days to complete, is very different from a setup for a fast reaction, where everything might happen in a blink of an eye. And not only setups, it affects all the downstream processes which might be dependent on the output of a given reaction. Therefore, it becomes all the more important to gather exact knowledge of the kinetics of reaction for process design. Unfortunately, diffusion comes into picture once we start doing experiments to determine kinetics, thus making the data unreliable.
This is the primary reason why the following work is being done: to find out whether a reactor can be designed to exhibit only the kinetics of the reaction, minimizing the effects of internal and external diffusion. For now, the reactors being used for study are fixed bed reactors and monolith reactors, since these are the most common reactors seen in setups of study of fast reactions.
The following work does the study of fixed bed reactors and how it can be designed for unadulterated kinetics measurement of a reaction.
Model
The fixed bed reactor model considers the oxidation of CO and a representative organic (propylene in this case) in a automobile catalytic...
Abstract
In this report, a Matlab model for simulating simultaneous oxidation of carbon monoxide and propylene in a fixed bed reactor. The model takes into account temperature variation and pressure drop down the reactor. The catalyst pellets are assumed to be isothermal; only the concentration variation is considered inside the pellet. Both external and internal diffusion is taken into account in the model. The results are then analyzed and some problems are noted. Then a new model is simulated to eliminate those problems. Also, a simpler isothermal case is also simulated for relative study.
Introduction
The reaction kinetics is one of the most important part of how we conduct our experiments. The setup for a slow reaction, which may take days to complete, is very different from a setup for a fast reaction, where everything might happen in a blink of an eye. And not only setups, it affects all the downstream processes which might be dependent on the output of a given reaction. Therefore, it becomes all the more important to gather exact knowledge of the kinetics of reaction for process design. Unfortunately, diffusion comes into picture once we start doing experiments to determine kinetics, thus making the data unreliable.
This is the primary reason why the following work is being done: to find out whether a reactor can be designed to exhibit only the kinetics of the reaction, minimizing the effects of internal and external diffusion. For now, the reactors being used for study are fixed bed reactors and monolith reactors, since these are the most common reactors seen in setups of study of fast reactions.
The following work does the study of fixed bed reactors and how it can be designed for unadulterated kinetics measurement of a reaction.
Model
The fixed bed reactor model considers the oxidation of CO and a representative organic (propylene in this case) in a automobile catalytic...