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Environmental impacts of power-to-X systems - A review of technological and methodological choices in Life Cycle Assessments

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  • Koj, Jan Christian
  • Wulf, Christina
  • Zapp, Petra

Abstract

This paper presents a review of 32 Life Cycle Assessment studies on Power-to-X. Due to their multiplicity, different Power-to-X chains are compared and influencing factors on environmental impacts are identified. Besides technological specifications, methodological choices of the publications are assessed. The majority of studies consider Power-to-Gas or Power-to-Transport. Additionally, six publications assess Power-to-Power, Power-to-Liquids or Power-to-Chemicals. Climate change is the most analyzed environmental impact category. Further impacts are assessed in 14 publications. The electricity source and the methodological concept of carbon dioxide consideration are crucial drivers of environmental impacts. The review reveals a lack of transparency on technological as well as on methodological level. Specifications like the multi-functionality approach used or in case of Power-to-Transport chains the life time mileage of vehicles are missing in most publications and hinder their comparability.

Suggested Citation

  • Koj, Jan Christian & Wulf, Christina & Zapp, Petra, 2019. "Environmental impacts of power-to-X systems - A review of technological and methodological choices in Life Cycle Assessments," Renewable and Sustainable Energy Reviews, Elsevier, vol. 112(C), pages 865-879.
    • Handle: RePEc:eee:rensus:v:112:y:2019:i:c:p:865-879
    DOI: 10.1016/j.rser.2019.06.029
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