In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization

Michael Höber; Philipp Wachter; Benjamin Königshofer; Felix Mütter; Hartmuth Schröttner; Christoph Hochenauer; Vanja Subotić

doi:10.1016/j.fuel.2022.124256

In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization

Michael Höber^*, Philipp Wachter, Benjamin Königshofer, Felix Mütter, Hartmuth Schröttner, Christoph Hochenauer, Vanja Subotić

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

More than 75 % of today’s H2 production is based on reforming processes using heterogeneous catalysts.
In addition, catalysts are needed for hydrogen generation from renewable resources such as biomass or biogas. However, no direct online monitoring of commercial Ni based catalysts is established. Catalysts are only monitored indirectly by measuring gas compositions, temperature profiles or using coke sensors, although direct online monitoring could detect degradation mechanisms at early stages. We demonstrate the methodology for electrochemical impedance spectroscopy based online monitoring of commercial Ni catalysts.
Furthermore, we studied the impact of three different contacting methods of Ni catalysts with ohmic resistances between 10 Ω and 105 Ω after the heat up procedure on the measurement results. Monitoring of the heat
up phase revealed, that choosing the right contacting method is essential to observe processes such as NiO reduction, whereas monitoring of degradation due to carbon loading was observed with every tested contacting
method. The demonstrated online monitoring of catalysts could be used to find and maintain more efficient and stable reforming conditions. In addition, the gained knowledge could even be used to prolong the lifetime
of catalysts by in situ adapting of operating conditions

Original language	English
Article number	124256
Journal	Fuel
Volume	324
Issue number	A
DOIs	https://doi.org/10.1016/j.fuel.2022.124256
Publication status	Published - 15 Sept 2022

Keywords

Electrochemical impedance spectroscopy
Methane reforming
Nickel catalysts
Online monitoring

ASJC Scopus subject areas

Energy Engineering and Power Technology
General Chemical Engineering
Fuel Technology
Organic Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Höber, M., Wachter, P., Königshofer, B., Mütter, F., Schröttner, H., Hochenauer, C., & Subotić, V. (2022). In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization. Fuel, 324(A), Article 124256. https://doi.org/10.1016/j.fuel.2022.124256

In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization. / Höber, Michael; Wachter, Philipp; Königshofer, Benjamin et al.
In: Fuel, Vol. 324, No. A, 124256, 15.09.2022.

Research output: Contribution to journal › Article › peer-review

Höber, M, Wachter, P, Königshofer, B, Mütter, F , Schröttner, H , Hochenauer, C & Subotić, V 2022, 'In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization', Fuel, vol. 324, no. A, 124256. https://doi.org/10.1016/j.fuel.2022.124256

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title = "In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization",

abstract = "More than 75 % of today{\textquoteright}s H2 production is based on reforming processes using heterogeneous catalysts.In addition, catalysts are needed for hydrogen generation from renewable resources such as biomass or biogas. However, no direct online monitoring of commercial Ni based catalysts is established. Catalysts are only monitored indirectly by measuring gas compositions, temperature profiles or using coke sensors, although direct online monitoring could detect degradation mechanisms at early stages. We demonstrate the methodology for electrochemical impedance spectroscopy based online monitoring of commercial Ni catalysts.Furthermore, we studied the impact of three different contacting methods of Ni catalysts with ohmic resistances between 10 Ω and 105 Ω after the heat up procedure on the measurement results. Monitoring of the heatup phase revealed, that choosing the right contacting method is essential to observe processes such as NiO reduction, whereas monitoring of degradation due to carbon loading was observed with every tested contactingmethod. The demonstrated online monitoring of catalysts could be used to find and maintain more efficient and stable reforming conditions. In addition, the gained knowledge could even be used to prolong the lifetimeof catalysts by in situ adapting of operating conditions",

keywords = "Electrochemical impedance spectroscopy, Methane reforming, Nickel catalysts, Online monitoring",

author = "Michael H{\"o}ber and Philipp Wachter and Benjamin K{\"o}nigshofer and Felix M{\"u}tter and Hartmuth Schr{\"o}ttner and Christoph Hochenauer and Vanja Suboti{\'c}",

note = "Funding Information: This project has been funded by partners of the ERA-Net SES 2018 joint call RegSys (www.eranet-smartenergysystems.eu) - a network of 30 national and regional RTD funding agencies of 23 European countries. As such, this project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 775970. The authors gratefully acknowledge the funding of this project entitled “AGRO-SOFC” (Grant No. 872299) by The Austrian Research Promotion Agency (FFG). We also want to mention that this work is done within the research initiative “Nachhaltige Personen- und G{\"u}termobilit{\"a}t”. Funding Information: This project has been funded by partners of the ERA-Net SES 2018 joint call RegSys ( www.eranet-smartenergysystems.eu ) - a network of 30 national and regional RTD funding agencies of 23 European countries. As such, this project has received funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under grant agreement no. 775970 . The authors gratefully acknowledge the funding of this project entitled “AGRO-SOFC” (Grant No. 872299 ) by The Austrian Research Promotion Agency (FFG) . We also want to mention that this work is done within the research initiative “Nachhaltige Personen- und G{\"u}termobilit{\"a}t”. Publisher Copyright: {\textcopyright} 2022 The Author(s)",

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AU - Höber, Michael

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AU - Königshofer, Benjamin

AU - Mütter, Felix

AU - Schröttner, Hartmuth

AU - Hochenauer, Christoph

AU - Subotić, Vanja

N1 - Funding Information: This project has been funded by partners of the ERA-Net SES 2018 joint call RegSys (www.eranet-smartenergysystems.eu) - a network of 30 national and regional RTD funding agencies of 23 European countries. As such, this project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 775970. The authors gratefully acknowledge the funding of this project entitled “AGRO-SOFC” (Grant No. 872299) by The Austrian Research Promotion Agency (FFG). We also want to mention that this work is done within the research initiative “Nachhaltige Personen- und Gütermobilität”. Funding Information: This project has been funded by partners of the ERA-Net SES 2018 joint call RegSys ( www.eranet-smartenergysystems.eu ) - a network of 30 national and regional RTD funding agencies of 23 European countries. As such, this project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 775970 . The authors gratefully acknowledge the funding of this project entitled “AGRO-SOFC” (Grant No. 872299 ) by The Austrian Research Promotion Agency (FFG) . We also want to mention that this work is done within the research initiative “Nachhaltige Personen- und Gütermobilität”. Publisher Copyright: © 2022 The Author(s)

PY - 2022/9/15

Y1 - 2022/9/15

N2 - More than 75 % of today’s H2 production is based on reforming processes using heterogeneous catalysts.In addition, catalysts are needed for hydrogen generation from renewable resources such as biomass or biogas. However, no direct online monitoring of commercial Ni based catalysts is established. Catalysts are only monitored indirectly by measuring gas compositions, temperature profiles or using coke sensors, although direct online monitoring could detect degradation mechanisms at early stages. We demonstrate the methodology for electrochemical impedance spectroscopy based online monitoring of commercial Ni catalysts.Furthermore, we studied the impact of three different contacting methods of Ni catalysts with ohmic resistances between 10 Ω and 105 Ω after the heat up procedure on the measurement results. Monitoring of the heatup phase revealed, that choosing the right contacting method is essential to observe processes such as NiO reduction, whereas monitoring of degradation due to carbon loading was observed with every tested contactingmethod. The demonstrated online monitoring of catalysts could be used to find and maintain more efficient and stable reforming conditions. In addition, the gained knowledge could even be used to prolong the lifetimeof catalysts by in situ adapting of operating conditions

AB - More than 75 % of today’s H2 production is based on reforming processes using heterogeneous catalysts.In addition, catalysts are needed for hydrogen generation from renewable resources such as biomass or biogas. However, no direct online monitoring of commercial Ni based catalysts is established. Catalysts are only monitored indirectly by measuring gas compositions, temperature profiles or using coke sensors, although direct online monitoring could detect degradation mechanisms at early stages. We demonstrate the methodology for electrochemical impedance spectroscopy based online monitoring of commercial Ni catalysts.Furthermore, we studied the impact of three different contacting methods of Ni catalysts with ohmic resistances between 10 Ω and 105 Ω after the heat up procedure on the measurement results. Monitoring of the heatup phase revealed, that choosing the right contacting method is essential to observe processes such as NiO reduction, whereas monitoring of degradation due to carbon loading was observed with every tested contactingmethod. The demonstrated online monitoring of catalysts could be used to find and maintain more efficient and stable reforming conditions. In addition, the gained knowledge could even be used to prolong the lifetimeof catalysts by in situ adapting of operating conditions

KW - Electrochemical impedance spectroscopy

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In operando electrochemical impedance spectroscopy monitoring of nickel catalysts for hydrogen production, Part I: Methodology and performance characterization: Methodology and performance characterization

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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