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CapsolGT^®

Carbon capture for open cycle gas turbines

Transform open cycles into clean, power-positive systems

CapsolGT^® is a patented, fully electric carbon capture solution designed specifically for high-temperature flue gas from open cycle gas turbines (OCGTs), where the hot flue gas reheats the pressurized clean flue gas to produce more power than needed by the capture process, turning a simple cycle gas turbine into a combined cycle power plant with integrated carbon capture.

How it works

CapsolGT^®builds on the proven CapsolEoP^® platform, adapted for direct integration with gas turbines operating at 500-600 °C. The process involves:

✓ CO₂ capture using hot potassium carbonate (HPC) in a packed-bed absorber

✓ Cooling of the turbine flue gas via heat transfer to regenerators and clean gas lines

✓ Gas reheating: Clean, pressurized flue gas is reheated using the turbine exhaust

✓ Expansion: The reheated gas is expanded to generate power-more than enough to run the capture system

✓ Steam-free stripping: Two mechanical vapor recompression (MVR) units and a reboiler provide heat to release high-purity CO₂

Result:

CapsolGT^® generates net positive electricity and captures up to 95% of turbine CO₂ emissions.

Why CapsolGT^®?

✓  Fully electric - No steam or fossil heat required

✓  Power positive - Recovers more energy than it uses

✓  Retains grid flexibility - Ideal for peaking or balancing markets

✓  Retrofit friendly - Integrates into existing OCGTs

✓  Solvent stability - Uses industry-proven hot potassium carbonate

✓  Long lifetime, low OPEX - Minimal solvent degradation, low environmental risk

From simple cycle to combined cycle - with capture

CapsolGT^® effectively upgrades an OCGT to a combined cycle system by recovering energy from both the flue gas and expanded clean gas. Unlike traditional amine-based capture systems, it is high-temperature compatible, water-efficient, and designed for fast-response generation.

Applications:

✓  Peaker plants

✓  Grid balancing and reserve power

✓  Hydrogen-ready turbines

✓  Future CCS hubs

✓  High-emission backup power systems

Brownfield and greenfield potential

Brownfield: By leveraging available infrastructure, CapsolGT^® integrates with existing OCGT plants with minimal modifications, reducing downtime and capital investment while maintaining plant flexibility. CapsolGT^® utilizes waste heat from the gas turbines to generate additional electricity while capturing 95% of the CO₂.

Greenfield: For new power plant projects, CapsolGT^® reduces system complexity by eliminating the need for additional steam systems and allowing a more efficient plant layout. This means fewer auxiliary systems, lower capital costs, and simplified operations from day one. As for brownfield projects, CapsolGT^® utilizes waste heat from the gas turbines to generate additional electricity while capturing 95% of the CO₂. The technology can be applied to modular low-carbon power islands.

Core performance metrics

Feature	Value
Flue gas input temperature	500-600 °C
CO₂ capture rate	≥ 99%
Solvent	Hot potassium carbonate (HPC)
Recovered energy	Surplus to capture demand
Net power output	Positive
Operation	Fully electric

Delivered together with leading turbine manufacturers

With the goal of adding significant value for power producers, helping them reduce cost and improve efficiency of future gas power plants.

Collaboration agreement to offer low-carbon gas power by deploying GE’s aeroderivative gas turbines in combination with CapsolGT^®carbon capture plants.

Siemens Energy and Capsol performed a non-exclusive pre-FEED study to evaluate CapsolGT^®solution in combination with simple cycle gas turbines.

Ready to decarbonize gas power?

Turn your open cycle gas turbine into a low-carbon, power-efficient asset with CapsolGT^®.

Talk to a specialist →