Theoretical Investigation of a Pd‐membrane Reactor for Methanol Synthesis

Rahimpour, Mohammad Reza; Ghader, Sattar

doi:10.1002/ceat.200301717

Cited by 80 publications

(33 citation statements)

References 10 publications

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“…However, there are some attempts of different configuration such as methanol removal [49], and the addition of hydrogen to reaction mixture [46,51]. There are some advantages in using said configurations.…”

Section: Concept Of Membrane Reactor In Co2 Hydrogenation Reactionmentioning

confidence: 99%

Current progress on zeolite membrane reactor for CO2 hydrogenation

Makertiharta

Dharmawijaya

Wenten

2017

AIP Conference Proceedings

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Section: Concept Of Membrane Reactor In Co2 Hydrogenation Reactionmentioning

confidence: 99%

Current progress on zeolite membrane reactor for CO2 hydrogenation

Makertiharta

Dharmawijaya

Wenten

2017

AIP Conference Proceedings

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“…Alloying the palladium, especially with silver, reduces the critical temperature for embitterment and leads to an increase in the hydrogen permeability. The highest hydrogen permeability was observed at an alloy composition of 23 wt % silver [27]. The Pd-Ag membrane is single phased after annealing in H 2 at 400 and 500°C and it was reported that the hydrogen permeation rate increases in a single-phase Pd-Ag alloy [28].…”

Section: Introductionmentioning

confidence: 95%

A Novel Fluidized‐Bed Membrane Dual‐Type Reactor Concept for Methanol Synthesis

Rahimpour¹,

Alizadehhesari²

2008

Chem Eng & Technol

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A novel fluidized-bed membrane dual-type methanol reactor (FBMDMR) concept is proposed in this paper. In this proposed reactor, the cold feed synthesis gas is fed to the tubes of the gas-cooled reactor and flows in counter-current mode with a reacting gas mixture in the shell side of the reactor, which is a novel membrane-assisted fluidized bed. In this way, the synthesis gas is heated by heat of reaction which is produced in the reaction side. Hydrogen can penetrate from the feed synthesis gas side into the reaction side as a result of a hydrogen partial pressure difference between both sides. The outlet synthesis gas from this reactor is fed to tubes of the water-cooled packed bed reactor and the chemical reaction is initiated by the catalyst. The partially converted gas leaving this reactor is directed into the shell of the gas-cooled reactor and the reactions are completed in this fluidized-bed side. This reactor configuration solves some drawbacks observed from the new conventional dual-type methanol reactor, such as pressure drop, internal mass transfer limitations, radial gradient of concentration, and temperature in the gas-cooled reactor. The two-phase theory of fluidization is used to model and simulate the proposed reactor. An industrial dual-type methanol reactor (IDMR) and a fluidized-bed dual-type methanol reactor (FBDMR) are used as a basis for comparison. This comparison shows enhancement in the yield of methanol production in the fluidized-bed membrane dual-type methanol reactor (FBMDMR).

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“…There are a few investigations on methanol synthesis in PdAg membrane-type methanol reactors [2,8]. However, there is no information available in the literature regarding the use of a Pd-membrane in an industrial methanol reactor.…”

Section: Introductionmentioning

confidence: 98%

“…Alloying the palladium, especially with silver, reduces the critical temperature for this embitterment and leads to an increase in the hydrogen permeability. The highest hydrogen permeability was observed at an alloy composition of 23 wt % silver [8]. Palladium-based membranes have been used for decades in hydrogen extraction because of their high permeability and good surface properties and because palladium, like all metals, is 100 % selective for hydrogen transport [9].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Methanol Production in a Membrane Dual‐Type Reactor

Rahimpour

Lotfinejad

2007

Chem Eng & Technol

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In this study, a dynamic model for a membrane dual-type methanol reactor was developed in the presence of long term catalyst deactivation. The proposed model is used to compare the performance of a membrane dual-type methanol reactor with a conventional dual-type methanol reactor. A conventional dual-type methanol reactor is a shell and tube heat exchanger reactor in which the first reactor is cooled with cooling water and the second one is cooled with synthesis gas. In a membrane dual-type reactor, the wall of the tubes in the gas-cooled conventional reactor is covered with a palladium-silver membrane, which is only permeable to hydrogen. Hydrogen can penetrate from the feed synthesis gas side into the reaction side due to the hydrogen partial pressure driving force. Hydrogen permeation through the membrane shifts the reaction towards the product side according to the thermodynamic equilibrium. The proposed dynamic model was validated against measured daily process data of a methanol plant recorded for a period of four years and a good agreement was achieved. The simulation results show that there is a favorable profile of temperature and activity of the membrane dual-type reactor relative to single and conventional dual-type reactor systems. Therefore, the performance of methanol reactor systems improves when a membrane is used in a conventional dual-type methanol reactor.

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Theoretical Investigation of a Pd‐membrane Reactor for Methanol Synthesis

Cited by 80 publications

References 10 publications

Current progress on zeolite membrane reactor for CO2 hydrogenation

Current progress on zeolite membrane reactor for CO2 hydrogenation

A Novel Fluidized‐Bed Membrane Dual‐Type Reactor Concept for Methanol Synthesis

Enhancement of Methanol Production in a Membrane Dual‐Type Reactor

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