Part of our Carbon Management & CCUS series: Reduction · Capture · Conversion · Storage.
Carbon storage — and the transport that precedes it — takes captured CO₂ from the capture plant to secure geological storage. Compression, dehydration and injection are all energy- and heat-intensive. Well-designed heat recovery trims the parasitic load at every step.
The Transport Chain at a Glance
Captured CO₂ is compressed to a dense phase (often 80–120 bar), dehydrated to prevent ice or hydrate formation, then moved by pipeline or ship and injected into saline aquifers or depleted fields. Each stage sheds or demands heat.
Multi-Stage Compression with Intercooling
Compressing CO₂ to pipeline pressure is one of the largest energy sinks in the whole CCUS chain. Between stages, the gas is hot and must be cooled before the next compressor — intercooling. Recovering that heat (rather than dumping it to ambient) reduces the compression work and can preheat other plant loads. Plate exchangers are the workhorse here thanks to their compact, high-effectiveness cooling.
Dehydration Needs Heat — Waste Heat Can Supply It
Before transport, CO₂ is dried, typically with triethylene glycol (TEG) or molecular sieves. Regenerating the dehydrant takes heat — heat that recovered compressor or process heat can provide instead of fresh fuel. Closing this loop is a direct, often-overlooked emissions saving.
Pipeline, Ship and Injection-Well Thermal Management
- Pipeline — dense-phase CO₂ can cool as it flows; controlled heat input and insulation keep it in the right phase.
- Ship — cryogenic or pressurized storage demands tight thermal control; cargo cooling loops recover and reject heat efficiently.
- Injection well — the stream is warmed or conditioned at the wellhead to protect formation and equipment; heat-pipe and run-around loops move that heat cleanly.
Frequently Asked Questions
How much energy does CO₂ compression use?
It is typically the second-largest load after capture itself — often 10–20% of a capture plant's output. Intercooling and heat recovery are the main levers to bring that down.
Can storage really be low-carbon?
Only if the capture, compression and dehydration steps are efficient. Heat recovery across those steps is what protects the net storage balance.
Which exchanger type fits the wellhead?
Where the stream must stay isolated from ambient or other media, run-around coils and heat pipes keep the CO₂ loop sealed while moving heat.
Related Pages
- Carbon Capture: Cutting Energy Demand
- Run-Around Coil & Desiccant Recovery
- Carbon Management & CCUS overview
Talk to Our Engineers
Every CCUS and carbon-reduction project lives or dies on its thermal balance. Tell us your stream temperatures, flow rates and duty, and we will propose a plate, heat-pipe, rotary or run-around coil configuration that recovers the most energy for the lowest lifecycle cost. Request a heat-recovery selection.