Lime|loop — a chemical heat battery, not a hot rock.
Stores energy in chemical bonds, not in temperature. That's how we deliver 700–900°C process heat 24/7, capture pure CO₂ in the same cycle, and decarbonise on a third of the grid capacity a conventional heat battery needs.
The thermochemical cycle in three stages.
Charge — calcination
During cheap off-peak grid hours, electricity heats the sorbent to ~900°C. CaCO₃ breaks down into CaO and a stream of pure CO₂. Energy is stored chemically — no thermal losses while idle.
Discharge — carbonation
On demand, CO₂ is reintroduced. The exothermic carbonation reaction releases 700–900°C process heat continuously, straight into your existing steam or air loops.
Capture — CO₂ revenue
The released CO₂ during charging is high-purity and pipeline-ready. Sell to an off-taker, use it on-site, or store it. A second revenue stream that subsidises the heat asset.
The only heat battery with a built-in second revenue stream.
| Technology | Storage | CO₂ capture | Cost of heat | Grid need |
|---|---|---|---|---|
| Lime|loop | Chemical | ✓ Free (process) | $40–60/MWh | Small–medium |
| Molten salt | Sensible | — None | $80–120/MWh | Large |
| Hot rock | Sensible | — None | $80–120/MWh | Large |
| Brick / ceramic | Sensible | — None | $80–120/MWh | Large |
What it costs in your country.
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