Designing a Multistage Adiabatic Reactor for Minimum Catalyst Volume

Beckett, Patrick; Evans, Tyler; Ryan, William E.; Akgerman, Aydin

doi:10.1080/00986448908940321

Cited by 3 publications

(1 citation statement)

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“…This process operates at 220–300 °C and 50–100 atm. The ICI quench-cooled converter consists of a number of adiabatic catalyst beds installed in series in one pressure vessel. , A quench reactor is the most common methanol converter design that has been on line for more than 40 years and has proven its robustness and reliability for capacities ranging from 50 up to 3000 metric tons per day (MTPD). , In comparison with other pseudoisothermal converter types such as tubular (Lürgi), double-tube heat-exchange (Mitsubishi), − and radial isothermal (Methanol Casale), the quench converter produces more CO 2 emission and requires a relatively larger catalyst volume as the temperature profile reaches the equilibrium maximum path . Environmental regulations are aiming at reducing greenhouse gases especially carbon dioxide and nitrous oxide.…”

Section: Introductionmentioning

confidence: 99%

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO₂ Quenching

et al. 2015

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The conversion of syngas derived from natural gas into methanol has been considered a relatively clean and environmentally friendly process. However, carbon dioxide is emitted as a result of using natural gas as fuel in the reformer furnace combustion zone to supply the heat required for endothermic reforming reactions. Carbon dioxide is a primary greenhouse gas emitted as flue gas from the reformer and has been contributing to global warming over the past few decades. Thereby, environmental regulations for new and existing industrial facilities have been enforced to mitigate the adverse effects of carbon dioxide emission. In this research, multiobjective optimization is applied for the operating conditions of the methanol synthesis loop via a multistage fixed bed adiabatic reactor system with an additional interstage CO2 quenching stream to maximize methanol production while reducing CO2 emissions. The model prediction for the methanol synthesis loop at steady state showed good agreement against data from an existing commercial plant. Then, the process flowsheet was developed and fully integrated with the Genetic Algorithms Toolbox that generated a set of optimal operating conditions with respect to upper and lower limits and several constraints. The results showed methanol production was improved by injecting shots of carbon dioxide recovered from the reformer at various reactor locations.

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Section: Introductionmentioning

confidence: 99%

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO₂ Quenching

et al. 2015

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Crossing Reaction Equilibrium in an Adiabatic Reactor System

Nicol

Hildebrandt

Glasser

1998

Dev. Chem. Eng. Mineral Process.

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The work presented in this paper looks at maximizing the conversion of an exothermic reversible reaction that is adiabatic overall, i.e. only allowing for internal heat exchange between streams. In a single adiabatic reactor the highest possible conversion is the equilibrium conversion. It is shown that an improvement can be made on this equilibrium conversion by using two reactors with two heat interchanging units. The heat interchange system can be further optimized by adding more reactors and heat interchangers. The optimum theoretical conversion for an adiabatic system was found to be the equilibrium conversion at the original feed temperature. This is achieved by operating a simultaneous heat interchanging and reactor structure. The work was extended to find a maximum conversion for a more practical system where account is taken of minimum temperature driving forces and incomplete conversions.

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The attainable region and process synthesis: reaction systems with external cooling and heating

Nicol

Hernier

Hildebrant

et al. 2001

Chemical Engineering Science

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Designing a Multistage Adiabatic Reactor for Minimum Catalyst Volume

Cited by 3 publications

References 1 publication

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO₂ Quenching

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO₂ Quenching

Crossing Reaction Equilibrium in an Adiabatic Reactor System

The attainable region and process synthesis: reaction systems with external cooling and heating

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Designing a Multistage Adiabatic Reactor for Minimum Catalyst Volume

Cited by 3 publications

References 1 publication

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO2 Quenching

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO2 Quenching

Crossing Reaction Equilibrium in an Adiabatic Reactor System

The attainable region and process synthesis: reaction systems with external cooling and heating

Contact Info

Product

Resources

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Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO₂ Quenching

Multiobjective Optimization of Methanol Synthesis Loop from Synthesis Gas via a Multibed Adiabatic Reactor with Additional Interstage CO₂ Quenching