Methane Catalyst Regeneration with Hydrogen Addition

Sonja Heikkilä, Katriina Sirviö, Seppo Niemi, Piritta Roslund, Kati Lehtoranta, Rasmus Pettinen, Hannu Vesala, Päivi Koponen, Kauko Kallinen, Teuvo Maunula, Heikki Korpi, Juha Kortelainen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    Increasing use of renewable energy places greater emphasis on peaking power production for times when renewable sources cannot meet total demand. Gas engines are a viable choice for peaking power plants. During combustion of natural or biogas, however, unburned fuel, especially methane, tends to remain in the exhaust gas. Pd-Pt/Al2O3 catalytic converters are proven to be the most efficient for methane conversion but they are easily poisoned by sulphur and water from the exhaust. A poisoned catalyst is inactive and its methane conversion is low. It might be possible to revive the catalyst by regeneration. According to the literature, hydrogen injection is one of the most effective regeneration methods. The aim of the present study was to find out whether hydrogen injection at three different temperatures enhances regeneration of a Pd-Pt/Al2O3 catalytic converter. The research was conducted in an engine laboratory and the exhaust gas was from a high-speed engine, modified to run with natural gas. The effect of the catalyst regeneration was measured by analyzing the methane conversion as well as SO2 concentrations downstream from the catalyst. Multiple H2 injection concentrations (1% to 2.5%) and periods (10 minutes to 1 hour) were used in the experiments. Results show the lowest exhaust temperature of 380 °C was insufficient for the catalyst to activate. In terms of methane conversion, the experiments at 500 °C were more successful, but no long-lasting effect was achieved by regeneration. In all experiments, sharp peaks of SO2 were registered in the exhaust gas immediately after the start of the regeneration. This indicates that H2 reacts in the catalyst and releases SO2. Further studies are required to improve the regeneration process and to evaluate the long-term effects of regeneration at high temperatures.
    Original languageEnglish
    Title of host publicationMeeting the Future of Combustion Engines
    Subtitle of host publication29th CIMAC World Congress
    Publication statusPublished - 2019
    MoE publication typeA4 Article in a conference publication
    Event29th CIMAC World Congress on Combustion Engine - Vancouver, Vancouver, Canada
    Duration: 10 Jun 201914 Jun 2019
    http://www.cimaccongress.com

    Conference

    Conference29th CIMAC World Congress on Combustion Engine
    CountryCanada
    CityVancouver
    Period10/06/1914/06/19
    Internet address

    Fingerprint

    Catalyst regeneration
    Methane
    Hydrogen
    Exhaust gases
    Catalysts
    Catalytic converters
    Engines
    Gas engines
    Experiments
    Biogas
    Temperature
    Natural gas
    Power plants
    Sulfur
    Water

    Cite this

    Heikkilä, S., Sirviö, K., Niemi, S., Roslund, P., Lehtoranta, K., Pettinen, R., ... Kortelainen, J. (2019). Methane Catalyst Regeneration with Hydrogen Addition. In Meeting the Future of Combustion Engines: 29th CIMAC World Congress [367]
    Heikkilä, Sonja ; Sirviö, Katriina ; Niemi, Seppo ; Roslund, Piritta ; Lehtoranta, Kati ; Pettinen, Rasmus ; Vesala, Hannu ; Koponen, Päivi ; Kallinen, Kauko ; Maunula, Teuvo ; Korpi, Heikki ; Kortelainen, Juha. / Methane Catalyst Regeneration with Hydrogen Addition. Meeting the Future of Combustion Engines: 29th CIMAC World Congress. 2019.
    @inproceedings{fbdcfc09b8d84dfa8ffb09fe784027dd,
    title = "Methane Catalyst Regeneration with Hydrogen Addition",
    abstract = "Increasing use of renewable energy places greater emphasis on peaking power production for times when renewable sources cannot meet total demand. Gas engines are a viable choice for peaking power plants. During combustion of natural or biogas, however, unburned fuel, especially methane, tends to remain in the exhaust gas. Pd-Pt/Al2O3 catalytic converters are proven to be the most efficient for methane conversion but they are easily poisoned by sulphur and water from the exhaust. A poisoned catalyst is inactive and its methane conversion is low. It might be possible to revive the catalyst by regeneration. According to the literature, hydrogen injection is one of the most effective regeneration methods. The aim of the present study was to find out whether hydrogen injection at three different temperatures enhances regeneration of a Pd-Pt/Al2O3 catalytic converter. The research was conducted in an engine laboratory and the exhaust gas was from a high-speed engine, modified to run with natural gas. The effect of the catalyst regeneration was measured by analyzing the methane conversion as well as SO2 concentrations downstream from the catalyst. Multiple H2 injection concentrations (1{\%} to 2.5{\%}) and periods (10 minutes to 1 hour) were used in the experiments. Results show the lowest exhaust temperature of 380 °C was insufficient for the catalyst to activate. In terms of methane conversion, the experiments at 500 °C were more successful, but no long-lasting effect was achieved by regeneration. In all experiments, sharp peaks of SO2 were registered in the exhaust gas immediately after the start of the regeneration. This indicates that H2 reacts in the catalyst and releases SO2. Further studies are required to improve the regeneration process and to evaluate the long-term effects of regeneration at high temperatures.",
    author = "Sonja Heikkil{\"a} and Katriina Sirvi{\"o} and Seppo Niemi and Piritta Roslund and Kati Lehtoranta and Rasmus Pettinen and Hannu Vesala and P{\"a}ivi Koponen and Kauko Kallinen and Teuvo Maunula and Heikki Korpi and Juha Kortelainen",
    year = "2019",
    language = "English",
    booktitle = "Meeting the Future of Combustion Engines",

    }

    Heikkilä, S, Sirviö, K, Niemi, S, Roslund, P, Lehtoranta, K, Pettinen, R, Vesala, H, Koponen, P, Kallinen, K, Maunula, T, Korpi, H & Kortelainen, J 2019, Methane Catalyst Regeneration with Hydrogen Addition. in Meeting the Future of Combustion Engines: 29th CIMAC World Congress., 367, 29th CIMAC World Congress on Combustion Engine, Vancouver, Canada, 10/06/19.

    Methane Catalyst Regeneration with Hydrogen Addition. / Heikkilä, Sonja ; Sirviö, Katriina; Niemi, Seppo; Roslund, Piritta; Lehtoranta, Kati; Pettinen, Rasmus; Vesala, Hannu; Koponen, Päivi; Kallinen, Kauko; Maunula, Teuvo; Korpi, Heikki; Kortelainen, Juha.

    Meeting the Future of Combustion Engines: 29th CIMAC World Congress. 2019. 367.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    TY - GEN

    T1 - Methane Catalyst Regeneration with Hydrogen Addition

    AU - Heikkilä, Sonja

    AU - Sirviö, Katriina

    AU - Niemi, Seppo

    AU - Roslund, Piritta

    AU - Lehtoranta, Kati

    AU - Pettinen, Rasmus

    AU - Vesala, Hannu

    AU - Koponen, Päivi

    AU - Kallinen, Kauko

    AU - Maunula, Teuvo

    AU - Korpi, Heikki

    AU - Kortelainen, Juha

    PY - 2019

    Y1 - 2019

    N2 - Increasing use of renewable energy places greater emphasis on peaking power production for times when renewable sources cannot meet total demand. Gas engines are a viable choice for peaking power plants. During combustion of natural or biogas, however, unburned fuel, especially methane, tends to remain in the exhaust gas. Pd-Pt/Al2O3 catalytic converters are proven to be the most efficient for methane conversion but they are easily poisoned by sulphur and water from the exhaust. A poisoned catalyst is inactive and its methane conversion is low. It might be possible to revive the catalyst by regeneration. According to the literature, hydrogen injection is one of the most effective regeneration methods. The aim of the present study was to find out whether hydrogen injection at three different temperatures enhances regeneration of a Pd-Pt/Al2O3 catalytic converter. The research was conducted in an engine laboratory and the exhaust gas was from a high-speed engine, modified to run with natural gas. The effect of the catalyst regeneration was measured by analyzing the methane conversion as well as SO2 concentrations downstream from the catalyst. Multiple H2 injection concentrations (1% to 2.5%) and periods (10 minutes to 1 hour) were used in the experiments. Results show the lowest exhaust temperature of 380 °C was insufficient for the catalyst to activate. In terms of methane conversion, the experiments at 500 °C were more successful, but no long-lasting effect was achieved by regeneration. In all experiments, sharp peaks of SO2 were registered in the exhaust gas immediately after the start of the regeneration. This indicates that H2 reacts in the catalyst and releases SO2. Further studies are required to improve the regeneration process and to evaluate the long-term effects of regeneration at high temperatures.

    AB - Increasing use of renewable energy places greater emphasis on peaking power production for times when renewable sources cannot meet total demand. Gas engines are a viable choice for peaking power plants. During combustion of natural or biogas, however, unburned fuel, especially methane, tends to remain in the exhaust gas. Pd-Pt/Al2O3 catalytic converters are proven to be the most efficient for methane conversion but they are easily poisoned by sulphur and water from the exhaust. A poisoned catalyst is inactive and its methane conversion is low. It might be possible to revive the catalyst by regeneration. According to the literature, hydrogen injection is one of the most effective regeneration methods. The aim of the present study was to find out whether hydrogen injection at three different temperatures enhances regeneration of a Pd-Pt/Al2O3 catalytic converter. The research was conducted in an engine laboratory and the exhaust gas was from a high-speed engine, modified to run with natural gas. The effect of the catalyst regeneration was measured by analyzing the methane conversion as well as SO2 concentrations downstream from the catalyst. Multiple H2 injection concentrations (1% to 2.5%) and periods (10 minutes to 1 hour) were used in the experiments. Results show the lowest exhaust temperature of 380 °C was insufficient for the catalyst to activate. In terms of methane conversion, the experiments at 500 °C were more successful, but no long-lasting effect was achieved by regeneration. In all experiments, sharp peaks of SO2 were registered in the exhaust gas immediately after the start of the regeneration. This indicates that H2 reacts in the catalyst and releases SO2. Further studies are required to improve the regeneration process and to evaluate the long-term effects of regeneration at high temperatures.

    UR - https://www.cimac.com/publications/technical-database/index.html

    M3 - Conference article in proceedings

    BT - Meeting the Future of Combustion Engines

    ER -

    Heikkilä S, Sirviö K, Niemi S, Roslund P, Lehtoranta K, Pettinen R et al. Methane Catalyst Regeneration with Hydrogen Addition. In Meeting the Future of Combustion Engines: 29th CIMAC World Congress. 2019. 367