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Hydrogen Glossary
Clear definitions for the hydrogen industry – sponsored by Learn Hydrogen
- Absorption
- Air Management System
- Alkaline Electrolysis
- Alkaline Fuel Cell (AFC)
- Ammonia (NH₃)
- Amperage
- Anaerobic Digestion
- Anion Exchange Membrane (AEM)
- Anode
- Atmospheric Pressure Electrolysis
- Auto-thermal Reforming
- Auxiliary Power Unit (APU)
- Backup Power
- Balance of Plant (BoP)
- Bankability
- Bankable Customer
- Battery Electric Vehicle (BEV)
- Biomass Gasification
- Blending
- Blue Hydrogen
- Boiling Point
- Boil-Off Gas
- Boil-off Losses
- BOP Stack Cooling
- Brittle Fracture
- Buffer Tank
- Bulk Storage
- By-product Hydrogen
- Carbon Capture and Storage (CCS)
- Carbon Footprint
- Catalyst
- Catalytic Reforming
- Centralized Hydrogen Production
- Chemical Hydride
- CI Score (Carbon Intensity Score)
- Clean Hydrogen
- CO₂ Emissions
- Compressed Hydrogen
- Cost per Kilogram
- Crossover
- Cryogenic Storage
- Decarbonisation
- Dehydrogenation
- Demand Response
- Desulphurisation
- Diesel Replacement
- Direct Methanol Fuel Cell (DMFC)
- Dispenser
- Distributed Generation
- DME (Dimethyl Ether)
- DOE (Department of Energy)
- Dry Reforming
- Dual Fuel Engine
- Durable Customer
- Efficiency
- Electrochemical Reaction
- Electrolyser
- Electrolysis
- Emissions
- End-use
- Energy Carrier
- Energy Density
- Energy Transition
- Feedstock
- Flame Temperature
- Flammability
- Flow Rate
- Fuel Cell
- Fuel Cell Electric Vehicle (FCEV)
- Gas Chromatography
- Gas Cylinder (Hydrogen)
- Gas Diffusion Layer
- Gaseous Hydrogen
- Gas Leak Sensor (Hydrogen)
- Gas Mixing Skid
- Gas Purifier
- Gravimetric Density
- Green Hydrogen
- Green Premium
- Grid Injection
- Hydride
- Hydrogen
- Hydrogen Blending
- Hydrogen Carrier
- Hydrogen Embrittlement
- Hydrogen Fuel Cell
- Hydrogen Pipeline
- Hydrogen Purifier
- Hydrogen Refuelling Station
- Hydrogen Sensor
- Hydrogen Storage
- Industrial Hydrogen
- Infrastructure (Hydrogen)
- Injection Point
- Inlet Pressure
- Insulation (Cryogenic)
- Intermittency (Renewables)
- Internal Reforming
- Investment Grade Hydrogen
- Ion Exchange Membrane
- ISO Tank
- Isotopes of Hydrogen
- Jet Fuel Alternative
- Jetting (Hydrogen Flame)
- Joint Venture (Hydrogen)
- Joule Heating
- Joule (J)
- J-Tube
- Junction Box (Fuel Cell)
- Just Transition
- Keyhole Welding (Hydrogen)
- K-Factor (Combustion)
- Kilogram of Hydrogen
- Kinetic Energy (Hydrogen)
- Knock Resistance
- KOH Electrolyte
- K-Type Thermocouple
- K-value (Insulation)
- KVA Rating (Fuel Cells)
- LCOH (Levelised Cost of Hydrogen)
- LH₂ Tank
- Line Pack
- Liquefaction Plant
- Liquefied Hydrogen
- LNG-Hydrogen Blends
- Losses (Hydrogen Systems)
- Low-Carbon Hydrogen
- Membrane Electrode Assembly (MEA)
- Metal Hydrides
- Methane Reforming
- Microgrid (Hydrogen-Powered)
- Modular Electrolyser
- Molten Carbonate Fuel Cell (MCFC)
- Nanoporous Materials
- Natural Gas Blending
- Near-Zero Hydrogen Emissions
- Nickel Catalyst
- Nickel-Metal Hydride (NiMH)
- Non-Thermal Plasma Reforming
- NOx Emissions
- Off-Grid Hydrogen
- Offtake Agreement
- Onboard Storage
- Onsite Hydrogen Generation
- Oxidant
- Oxidation Reaction
- Oxygen Evolution Reaction (OER)
- Partial Oxidation
- PEM Electrolyser
- PEM Fuel Cell
- Pressure Vessel
- Purification Unit
- QRA (Quantitative Risk Assessment)
- Quad Chart
- Quality Assurance (Hydrogen)
- Quantum Storage
- Quasi-Static Compression
- Quenching Distance
- Quenching (Flame)
- Raman Spectroscopy
- Redox Reaction
- Reformer
- Refuelling Station
- Renewable Hydrogen
- Reversible Fuel Cell
- Safety Valve
- Separator (Fuel Cell)
- Smart Grid Integration
- Solid Oxide Fuel Cell (SOFC)
- Sorption Material
- Steam Methane Reforming (SMR)
- Tank-to-Wheel
- Thermal Cracking
- Thermochemical Water Splitting
- Time-of-Use Electrolysis
- Type IV Cylinder
- Ultra-Pure Hydrogen
- Underground Hydrogen Storage
- Unitised Regenerative Fuel Cell (URFC)
- Universal Connector (Hydrogen)
- Upstream (Hydrogen)
- Utilisation Factor
- Utility-Scale Electrolyser
- Variable Load Operation
- Vehicle-to-Grid (V2G)
- Vent Stack
- Vessel Integrity
- Voltage Efficiency (Fuel Cell)
- Volumetric Density
- Water Electrolysis
- Water-Gas Shift Reaction
- Water Recovery (Fuel Cell)
- Wet Seal Compressor
- Wobbe Index
- Wrap (Cylinder)
- X-axis (Hydrogen Sensor Graphs)
- Xenobiotic Impact
- Xenon Comparison
- Xenon Flash Lamp
- XPS (X-ray Photoelectron Spectroscopy)
- X-ray Diffraction (XRD)
- Yellow Hydrogen
- Yield Curve (Electrolysis)
- Yield Efficiency
- Yield Enhancement
- Yield (Hydrogen Production)
- Y-pipe Connector
- Y-Scale (Graph)
- Zeolite Catalyst
- Zero-Emission Hydrogen
- Zero-Gap Electrolyser
- Zero Liquid Discharge
- Zirconia Electrolyte
- Zirconium Hydride