Radio Frequency Driven Catalytic Reactors for Portable Green Chemistry
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: August 19, 2020
- Duration: 12 minutes
- Skill Level: Intermediate
- PDHs: 0.20
The volumetric electric heating methods and modular reactors for power-to-chemicals route can pave a path towards distributed manufacturing and reduced greenhouse gas emissions when electricity is harnessed from renewable energy sources. Uniform volumetric heating of catalyst can also improve catalyst utilization, avoid homogeneous side reactions, and improve reactor portability.2 Since the first published report of microwave organic synthesis, 3-4 microwave heating has been studied for various endothermic catalytic reactions.5 However, high power microwaves (> 2.45 GHz frequency) are limited due to temperature hotspots, runaway reactions, penetration depth, reflection losses, and stringent safety exposure limits.
This study employs a multidisciplinary approach to make portable reactors by using novel materials like carbon nanotubes (CNTs) and silicon carbide (SiC) fibers as additives in catalyst. We utilize interaction of these materials with radio frequency fields (1 MHz-300 MHz) to selectively heat catalytic reactors and drive a reaction. A proof-of-concept is demonstrated for methanol steam reforming reaction using platinum as a catalyst. The RF heating response of CNT/platinum /alumina and SiC fiber/platinum were investigated for varying power using different kinds of noncontact RF applicators. The conversion of methanol for different reaction temperatures was compared to conventional ovens. This power to chemical method has application in modular reactors for on-site and on-demand production of chemicals using electric power.
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(4) Tse, M. Y.; Depew, M. C.; Wan, J. K. S. Applications of high power micro wave catalysis in chemistry. Research on Chemical Intermediates 1990, 13 (3), 221-236, DOI: 10.1163/156856790x00102.
(5) Ramirez, A.; Hueso, J. L.; Abian, M.; Alzueta, M. U.; Mallada, R.; Santamaria, J. Escaping undesired gas-phase chemistry: Microwave-driven selectivity enhancement in heterogeneous catalytic reactors. Science Advances 2019, 5 (3), eaau9000, DOI: 10.1126/sciadv.aau9000.
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