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  "documentTitle": "Hydrogen applications and business models",
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      "text": "Comparison of specific energy (energy per mass or gravimetric density) and energy density (energy per volume or volumetric density) for several fuels based on lower heating values",
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      "text": "Gravimetric vs Volumetric Energy Density",
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      "text": "Disadvantages: Rare in natural H2 form, High CO2 emissions for industrial production, Large ignition range, Corrosive",
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      "text": "Advantages: High energy density, No CO2 emissions during combustion, Abundant on earth, Multiple applications",
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      "kind": "paragraph",
      "text": "Name: Hydrogen (\"water former\" in ancient Greek)\nState in ambient conditions: gaseous, diatomic (H2)\nProperties: Smallest, lightest, oldest, and most abundant element in the universe\nMainly found in combination with carbon (hydrocarbons), oxygen (water), or nitrogen (ammonia)\nColourless, odourless, tasteless, non-toxic, and non-metallic\nHighly diffusive and oxidizing\nReactants: Reacts spontaneously with oxygen, chlorine, and fluorine\nCombustion: 2H2 + 2O2 -> 2 H2O + 572 kJ  ΔH = -286 kJ/mol",
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      "text": "Sources: \"Hydrogen Storage,\" US Department of Energy; Kearney Energy Transition Institute",
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