Fig. 3: Life-cycle GHG emissions intensity of blue hydrogen using based on various capture rates and GWP assumptions. | Nature Energy

Fig. 3: Life-cycle GHG emissions intensity of blue hydrogen using based on various capture rates and GWP assumptions.

From: Geospatial variation in carbon accounting of hydrogen production and implications for the US Inflation Reduction Act

Fig. 3

Life-cycle GHG emissions intensity in kgCO2e kg−1 H2 associated with blue hydrogen production using natural gas from the Marcellus and Permian shale basins considering theoretical and observed CO2 capture rates. Dark and light colours represent GWP-100 and GWP-20 results, respectively (IPCC AR 6 values). Overall, the Permian blue H2 supply chain has a base-case gas-production-normalized methane leakage of 5.2% whereas the Marcellus blue H2 supply chain has a base-case methane leakage of 1.25% before co-product allocation. The dotted line represents the threshold emissions intensity to qualify for the clean hydrogen production tax credits in the IRA.

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