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<p>This study aimed to assess the environmental impact of converting biogas to biomethane using ex situ, hydrogenotrophic methods with hydrogen (H₂) sourced from alternative production lines. The base scenario used electricity from the national grid, while scenarios 1 and 2 used solar power via photovoltaic panels and wind power, respectively. A life cycle analysis (LCA) was conducted for the different energy source scenarios. The results were evaluated using the ReCiPe 2016 Midpoint (H) impact assessment method, which considers 18 impact categories. A model was developed based on production data from a real biogas plant in Izmir, for which activity data were obtained directly from the plant’s logs. The LCA analysis revealed that producing hydrogen from grid electricity resulted in 10.3&#xa0;kg of CO₂ equivalent in the climate change category, a figure that decreased to 1.27&#xa0;kg of CO₂ equivalent when solar energy was used instead. Overall, the carbon footprint decreased from 8.66 to − 0.494&#xa0;kg CO₂ eq. In the second scenario, hydrogen was produced using wind energy rather than grid electricity. The analysis indicated that producing hydrogen from grid electricity resulted in 10.3&#xa0;kg CO₂ eq in the climate change category, whereas using wind energy reduced this figure to 0.199&#xa0;kg CO₂ eq. The LCA results demonstrate that energy sources and electricity demand play a crucial role in determining GHG emissions and that the LCA can assist companies and governments in decision-making and policy development.</p>

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Life Cycle Analysis (LCA) of Hydrogen Boosted Biomethanization with Alternative Power Scenarios

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Rana Taşkın,
  • Sıdıka Tuğçe Kalkan,
  • Nuri Azbar

摘要

This study aimed to assess the environmental impact of converting biogas to biomethane using ex situ, hydrogenotrophic methods with hydrogen (H₂) sourced from alternative production lines. The base scenario used electricity from the national grid, while scenarios 1 and 2 used solar power via photovoltaic panels and wind power, respectively. A life cycle analysis (LCA) was conducted for the different energy source scenarios. The results were evaluated using the ReCiPe 2016 Midpoint (H) impact assessment method, which considers 18 impact categories. A model was developed based on production data from a real biogas plant in Izmir, for which activity data were obtained directly from the plant’s logs. The LCA analysis revealed that producing hydrogen from grid electricity resulted in 10.3 kg of CO₂ equivalent in the climate change category, a figure that decreased to 1.27 kg of CO₂ equivalent when solar energy was used instead. Overall, the carbon footprint decreased from 8.66 to − 0.494 kg CO₂ eq. In the second scenario, hydrogen was produced using wind energy rather than grid electricity. The analysis indicated that producing hydrogen from grid electricity resulted in 10.3 kg CO₂ eq in the climate change category, whereas using wind energy reduced this figure to 0.199 kg CO₂ eq. The LCA results demonstrate that energy sources and electricity demand play a crucial role in determining GHG emissions and that the LCA can assist companies and governments in decision-making and policy development.