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  "documentTitle": "Hydrogen applications and business models",
  "authorId": "Kearney",
  "authorName": "Kearney",
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  "notes": "Part of a series on the hydrogen value chain.",
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      "text": "Three electrolysis technologies are available, all based on the same electrochemical reaction but with differences in the materials used and the operating point.",
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      "text": "Alkaline electrolysis (AE): oldest technology, uses potassium hydroxide, 52-69% efficiency, cheapest option.\nProton exchange membrane (PEM): rapidly evolving, 60-77% efficiency, higher flexibility.\nSolid oxide electrolysis cell (SOEC): R&D stage, 74-81% efficiency, high temperature.",
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      "text": "Green hydrogen mostly relies on electrolysis technologies, involving an electrochemical reaction where electrical energy allows a water split between hydrogen and dioxygen.",
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      "text": "Note: LCOH calculation: (present value of investments + present value of costs)/(present value of yearly hydrogen production), in $/kg",
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      "kind": "title",
      "text": "Blue and green hydrogen sources offer potential decarbonization solutions, requiring either CCS deployment or use of renewables (2/2)",
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