Rapid control of hydrogen permeation in Pd membrane reactor by magnetic-field-induced heating under microwave irradiation

Sato, Koichi; Miyakawa, Masato; Nishioka, Makihito

doi:10.1016/j.ijhydene.2020.02.147

Cited by 10 publications

(3 citation statements)

References 57 publications

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“…For example, carbon deposition on zeolites leads to a low resonance frequency and Q -factor owing to the high conductivity of deposited carbon. Nishioka et al − developed a frequency autotracking MW generator equipped with a semiconductor MW amplifier. This system enables efficient MW heating by periodically sweeping the incident MW frequency and monitoring the S 21 output while autotracking the input MWs to the resonance frequency.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Facile Detection of the WO₃ Catalyst Oxidation State under Microwaves Using a Resonance Frequency

et al. 2020

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Microwaves (MWs) are often used to enhance various heterogeneous catalytic reactions. Here, we demonstrate real-time monitoring of a catalyst's oxidation state in a microwave catalytic reaction using a resonance frequency. The changes in the catalyst's oxidation state during the reaction induced changes in the resonance frequency in the cavity resonator. The resonance frequency was not affected by 2-propanol adsorption, while the frequency decreased with the reduction of WO 3 → WO 3−x . That is, the redox state of the WO 3 catalyst could be detected using the resonance frequency. The oxidation state of the WO 3 catalyst was then directly observed by the resonance frequency during the dehydration reaction of 2-propanol by microwaves as a model reaction. Resonance frequency monitoring revealed that the enhanced dehydration of 2-propanol by microwaves was attributable to the reduction of the WO 3 catalyst. Moreover, the temporal changes in the oxidation state of the WO 3 catalyst detected by the resonance frequency coincided with that observed by operando Raman spectroscopy. Therefore, real-time resonance frequency monitoring allowed facile detection of the bulk catalyst oxidation state under microwaves without using any spectroscopic apparatus.

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Section: Introductionmentioning

confidence: 99%

Real-Time Facile Detection of the WO₃ Catalyst Oxidation State under Microwaves Using a Resonance Frequency

et al. 2020

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“…The TM 110 mode with the maximum magnetic field on the cylindrical center axis was used as the MW irradiation method. Although magnetic-field heating has been used in solid-phase syntheses or metal heating, − there are a few examples of chemical syntheses of solution systems using a magnetic-field-concentrated mode. − Therefore, the characteristics of solutions heated using the present apparatus were investigated for a conventional tubular-type reactor. Then, continuous syntheses of metal nanoparticles were conducted as chemical reaction examples in this SFprocess.…”

Section: Introductionmentioning

confidence: 99%

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Miyakawa

Nakamura

Iwabuchi

et al. 2020

Ind. Eng. Chem. Res.

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We developed a sheet-type microwave (MW) flow process that uses a capillary phenomenon to retain a reaction solution between fabric fibers without using a conventional reaction tube. This process is applicable to various reactions that use highly viscous raw material solutions or raw material solutions that generate gas, which are difficult to handle in a conventional flow synthesis. Using this process, single and multiple sheets were transferred continuously similarly to a belt conveyor. Precise temperature control was achieved using MW heating with solidstate devices. For syntheses containing many salts or metal precursors, TM 110 single-mode MW with the magnetic field focused on the cylindrical center axis was suitable. Using this chemical reaction model with a highly viscous solution or involving gas evolution during reaction, continuous syntheses of silver, nickel, and copper nanoparticles were achieved.

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“…Paper [11] shows the results of a new microwave (MW) heating system induced by a magnetic field specifically designed and applied for uniform heating of Pd membranes. The magnetic field can precisely excite the surface current (eddy current) and causes Joule heating.…”

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confidence: 99%

Editorial–ECOS 2019 and ICCMR14 International Journal of Hydrogen energy combined special issue

Stanek

Gallucci

2021

International Journal of Hydrogen Energy

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Rapid control of hydrogen permeation in Pd membrane reactor by magnetic-field-induced heating under microwave irradiation

Cited by 10 publications

References 57 publications

Real-Time Facile Detection of the WO₃ Catalyst Oxidation State under Microwaves Using a Resonance Frequency

Real-Time Facile Detection of the WO₃ Catalyst Oxidation State under Microwaves Using a Resonance Frequency

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Editorial–ECOS 2019 and ICCMR14 International Journal of Hydrogen energy combined special issue

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Rapid control of hydrogen permeation in Pd membrane reactor by magnetic-field-induced heating under microwave irradiation

Cited by 10 publications

References 57 publications

Real-Time Facile Detection of the WO3 Catalyst Oxidation State under Microwaves Using a Resonance Frequency

Real-Time Facile Detection of the WO3 Catalyst Oxidation State under Microwaves Using a Resonance Frequency

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Editorial–ECOS 2019 and ICCMR14 International Journal of Hydrogen energy combined special issue

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Real-Time Facile Detection of the WO₃ Catalyst Oxidation State under Microwaves Using a Resonance Frequency

Real-Time Facile Detection of the WO₃ Catalyst Oxidation State under Microwaves Using a Resonance Frequency