Lo que es
Alkaline is cheaper and uses no scarce catalysts, but it responds more slowly to changing power input. The choice between it and PEM is a direct trade between iridium and flexibility.
La lista de materiales
Escálelo →Las cantidades son per MW of capacityrango indicativo
| Material | Bajo | Alto | Unidad | Base |
|---|---|---|---|---|
| Iron & Steel | 2,000 | 5,000 | kg | Stack, frames and vessels |
| Copper crítico | 400.0 | 1,200 | kg | Power delivery |
| Nickel crítico | 300.0 | 800.0 | kg | Electrodes and catalyst coatings |
| Potash crítico | 100.0 | 400.0 | kg | Potassium hydroxide electrolyte |
Indicative range compiled from published technology studies and chemistry; verify against a manufacturer specification before use. Las filas marcadas como «traza» contienen el material en cantidades demasiado pequeñas para expresarse de forma útil como masa; la restricción allí es la pureza o el número de proveedores, no el tonelaje.
Las alternativas
La sustitución es la fuerza más subestimada en materiales. Cuando un metal se encarece o resulta políticamente problemático, los ingenieros diseñan soluciones alternativas — y la demanda de una mina entera puede desvanecerse.
HVDC Transmission Cable
High-voltage direct-current cable, the technology used to move power hundreds of kilometres with low loss.
PEM Electrolyser
Splits water using a polymer membrane, platinum and iridium — fast-responding but catalyst-hungry.
Pressurised Water Reactor
The most common reactor design: enriched uranium fuel in zirconium tubes, water as both coolant and moderator.
Three-Way Catalytic Converter
The ceramic honeycomb in an exhaust that converts three pollutants at once, coated in platinum-group metals.