Improving performance of induction-heated steam methane reforming

Mads Radmer Almind, Søren Bastholm Vendelbo, Mikkel Fougt Hansen, Morten Gotthold Vinum, Cathrine Frandsen, Peter Mølgaard Mortensen*, Jakob Soland Engbæk

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Induction heating may be an electrical solution for heating of catalytic reactors. Recent studies have shown that CoNi nanoparticles may act as both inductors for hysteresis heating and catalyst, such that they in an alternating magnetic field are able to drive the strongly endothermic steam methane reforming reaction with > 90% gas conversion at temperatures of ≈800 °C. However, lab-scale induction-heated reactors are limited by low energy transfer efficiency and previous work did not optimize the surrounding instrumentation. Here, we focused on the optimization of an induction setup for steam methane reforming. The performance of the reactor system was investigated through experiments at varying alternating magnetic field conditions, to evaluate the effect of frequency and coil geometry. The results from these experiments were modelled by a simple theoretical framework. Increasing the frequency of the alternating magnetic field from 68 kHz to 189 kHz was found to increase the energy transfer efficiency. Moreover, the energy transfer efficiency also increased when going from a short and wide coil with height to radius ratio of 3.8 to a long and narrow coil with height to radius ratio of 10.8. Overall, the energy transfer efficiency was increased from an initial 11% in the bench scale reactor setup, to 23% in the optimized version. Moreover, combining the bench scale results with the theoretical framework we extrapolated the data to large-scale systems. The analysis indicated that the energy efficiency of induction-heated steam reforming systems scaled to larger H2 capacities may be above 80%. This efficiency would allow the technology to be competitive with other electricity driven routes to hydrogen production when considering only the energy requirements.
Original languageEnglish
JournalCatalysis Today
ISSN0920-5861
DOIs
Publication statusAccepted/In press - 2019

Keywords

  • Catalysis
  • Electric heating
  • Ferromagnetism
  • Hysteresis
  • Induction
  • Steam reforming

Cite this

Almind, Mads Radmer ; Vendelbo, Søren Bastholm ; Hansen, Mikkel Fougt ; Vinum, Morten Gotthold ; Frandsen, Cathrine ; Mortensen, Peter Mølgaard ; Engbæk, Jakob Soland. / Improving performance of induction-heated steam methane reforming. In: Catalysis Today. 2019.
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title = "Improving performance of induction-heated steam methane reforming",
abstract = "Induction heating may be an electrical solution for heating of catalytic reactors. Recent studies have shown that CoNi nanoparticles may act as both inductors for hysteresis heating and catalyst, such that they in an alternating magnetic field are able to drive the strongly endothermic steam methane reforming reaction with > 90{\%} gas conversion at temperatures of ≈800 °C. However, lab-scale induction-heated reactors are limited by low energy transfer efficiency and previous work did not optimize the surrounding instrumentation. Here, we focused on the optimization of an induction setup for steam methane reforming. The performance of the reactor system was investigated through experiments at varying alternating magnetic field conditions, to evaluate the effect of frequency and coil geometry. The results from these experiments were modelled by a simple theoretical framework. Increasing the frequency of the alternating magnetic field from 68 kHz to 189 kHz was found to increase the energy transfer efficiency. Moreover, the energy transfer efficiency also increased when going from a short and wide coil with height to radius ratio of 3.8 to a long and narrow coil with height to radius ratio of 10.8. Overall, the energy transfer efficiency was increased from an initial 11{\%} in the bench scale reactor setup, to 23{\%} in the optimized version. Moreover, combining the bench scale results with the theoretical framework we extrapolated the data to large-scale systems. The analysis indicated that the energy efficiency of induction-heated steam reforming systems scaled to larger H2 capacities may be above 80{\%}. This efficiency would allow the technology to be competitive with other electricity driven routes to hydrogen production when considering only the energy requirements.",
keywords = "Catalysis, Electric heating, Ferromagnetism, Hysteresis, Induction, Steam reforming",
author = "Almind, {Mads Radmer} and Vendelbo, {S{\o}ren Bastholm} and Hansen, {Mikkel Fougt} and Vinum, {Morten Gotthold} and Cathrine Frandsen and Mortensen, {Peter M{\o}lgaard} and Engb{\ae}k, {Jakob Soland}",
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Improving performance of induction-heated steam methane reforming. / Almind, Mads Radmer; Vendelbo, Søren Bastholm; Hansen, Mikkel Fougt; Vinum, Morten Gotthold; Frandsen, Cathrine; Mortensen, Peter Mølgaard; Engbæk, Jakob Soland.

In: Catalysis Today, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Improving performance of induction-heated steam methane reforming

AU - Almind, Mads Radmer

AU - Vendelbo, Søren Bastholm

AU - Hansen, Mikkel Fougt

AU - Vinum, Morten Gotthold

AU - Frandsen, Cathrine

AU - Mortensen, Peter Mølgaard

AU - Engbæk, Jakob Soland

PY - 2019

Y1 - 2019

N2 - Induction heating may be an electrical solution for heating of catalytic reactors. Recent studies have shown that CoNi nanoparticles may act as both inductors for hysteresis heating and catalyst, such that they in an alternating magnetic field are able to drive the strongly endothermic steam methane reforming reaction with > 90% gas conversion at temperatures of ≈800 °C. However, lab-scale induction-heated reactors are limited by low energy transfer efficiency and previous work did not optimize the surrounding instrumentation. Here, we focused on the optimization of an induction setup for steam methane reforming. The performance of the reactor system was investigated through experiments at varying alternating magnetic field conditions, to evaluate the effect of frequency and coil geometry. The results from these experiments were modelled by a simple theoretical framework. Increasing the frequency of the alternating magnetic field from 68 kHz to 189 kHz was found to increase the energy transfer efficiency. Moreover, the energy transfer efficiency also increased when going from a short and wide coil with height to radius ratio of 3.8 to a long and narrow coil with height to radius ratio of 10.8. Overall, the energy transfer efficiency was increased from an initial 11% in the bench scale reactor setup, to 23% in the optimized version. Moreover, combining the bench scale results with the theoretical framework we extrapolated the data to large-scale systems. The analysis indicated that the energy efficiency of induction-heated steam reforming systems scaled to larger H2 capacities may be above 80%. This efficiency would allow the technology to be competitive with other electricity driven routes to hydrogen production when considering only the energy requirements.

AB - Induction heating may be an electrical solution for heating of catalytic reactors. Recent studies have shown that CoNi nanoparticles may act as both inductors for hysteresis heating and catalyst, such that they in an alternating magnetic field are able to drive the strongly endothermic steam methane reforming reaction with > 90% gas conversion at temperatures of ≈800 °C. However, lab-scale induction-heated reactors are limited by low energy transfer efficiency and previous work did not optimize the surrounding instrumentation. Here, we focused on the optimization of an induction setup for steam methane reforming. The performance of the reactor system was investigated through experiments at varying alternating magnetic field conditions, to evaluate the effect of frequency and coil geometry. The results from these experiments were modelled by a simple theoretical framework. Increasing the frequency of the alternating magnetic field from 68 kHz to 189 kHz was found to increase the energy transfer efficiency. Moreover, the energy transfer efficiency also increased when going from a short and wide coil with height to radius ratio of 3.8 to a long and narrow coil with height to radius ratio of 10.8. Overall, the energy transfer efficiency was increased from an initial 11% in the bench scale reactor setup, to 23% in the optimized version. Moreover, combining the bench scale results with the theoretical framework we extrapolated the data to large-scale systems. The analysis indicated that the energy efficiency of induction-heated steam reforming systems scaled to larger H2 capacities may be above 80%. This efficiency would allow the technology to be competitive with other electricity driven routes to hydrogen production when considering only the energy requirements.

KW - Catalysis

KW - Electric heating

KW - Ferromagnetism

KW - Hysteresis

KW - Induction

KW - Steam reforming

U2 - 10.1016/j.cattod.2019.05.005

DO - 10.1016/j.cattod.2019.05.005

M3 - Journal article

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

ER -