HYDROGEN PATHWAY COMPARISON
Yenra | Updated September 17, 2026
Article: https://yenra.com/hydrogen-fuel-cell-vehicles/

Purpose: compare vehicle fuel pathways with matching boundaries and units.
Keep measured values, modeled factors and invented assumptions distinguishable.

Vehicle / service / geography / period:
Fuel consumption (kg hydrogen per 100 km) and source:
Delivered-fuel factor (kg CO2e per kg hydrogen) and source/version:
Factor includes feedstock, production, compression, delivery, dispensing and losses? Specify:
Emissions metric and time horizon:
Upstream kg CO2e/100 km = consumption x delivered-fuel factor:
Upstream g CO2e/km = kg CO2e/100 km x 10:
Other vehicle-use effects, if included:
Vehicle production, replacement and end-of-life stages, if included:
Energy quantities and HHV/LHV basis:
Alternative scenario and changed assumption:
Sensitivity / uncertainty / evidence still needed:

Fictional example: 1.0 kg/100 km x 6 kg CO2e/kg = 6 kg CO2e/100 km = 60 g CO2e/km. Factor 12 gives 120 g/km at the same consumption. Both invented factors include production and delivery. Vehicle manufacturing and separately assessed use effects are excluded.

Primary references used in the article:
https://www.energy.gov/cmei/rd-greet-life-cycle-assessment-model
https://www.energy.gov/cmei/fuels/h2iq-hour-learn-use-greet-model-emissions-life-cycle-analysis-text-version