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Carbon Capture
Coal is the primary fuel source for over 80% of Australia's current electrical supply. Thus, Carbon Capture and Storage (CCS) has become a vital component of local government and industry efforts to reach greenhouse gas emissions targets.
Process Group's carbon capture technology can be instantly retrofitted to virtually any exhaust gas system, including coal or gas-fired boilers, gas turbines, blast furnaces, and cement kiln off-gas. The capture process enables carbon dioxide to be selectively absorbed from flue gas via counter-current contact with a regenerable solvent. The solvent is typically an amine-based aqueous solution specially designed to selectively absorb CO2 from gas streams.
Process Group designs and builds carbon capture plants specific to each client's needs. We also provide expertise in processing the captured carbon dioxide for various applications including:
- Liquefaction for commercial use
- Wastewater pH control
- Enhanced oil / gas recovery
- Mineral sequestration
- Geo-sequestration
Process Group is closely associated with The Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC). Participation in the CO2CRC, combined with our activity in the design and construction of carbon capture packages, provides us with access to the latest advances in carbon capture technologies. Process Group will continue to be in the vanguard of carbon capture and storage innovation, and help more companies and governments achieve their emissions objectives.
Bulwer Island Refinery Amine Regeneration Package
(440 usgpm DEA),
Location: Queensland, Australia (installed 2000)
Design Basis
The design of Carbon Capture Systems is unique to each situation with the overall package design varying based upon each client's specified process conditions.
Each system is typically designed and built as a complete turn-key package with particular emphasis given to the following issues:
- CO2 product purity
- Minimum solvent losses
- Minimum utilities consumption
- Optimum plant efficiency and design integrity
- Compliance with HSE requirements
- Environmentally conscientious design
Process Description
In a typical CO2 Capture package, hot flue gas passes through the scrubber tower where it is cooled with cooling water (1), before being fed to the absorber tower. The gas enters near the bottom of the absorber tower and flows upward through the internal packing (2), coming into contact with the solvent, which enters near the top of the tower, as the solvent cascades down through the tower. As the flue gas rises through the tower the carbon dioxide level is progressively reduced as it is absorbed by the solvent, meaning the treated gas vented from the absorber (3) is virtually free of CO2.
From the bottom of the absorber tower the CO2-rich solvent is pumped through the lean-rich exchanger (4) to pre-heat the solvent before it enters the regenerator tower. In the regenerator the solvent is heated via the reboiler (5) to reverse the absorption reaction. As the solvent cascades down through the tower, CO2 is gradually desorbed from the solvent (6). By the time the solvent reaches the bottom of the tower virtually all of the absorbed CO2 has been released, and the CO2-lean solvent is cooled and pumped back to the top of the absorber tower to repeat the process (7).
The desorbed CO2 exits the regenerator tower as a pure, water saturated gas where it is cooled (8) and then passes through the reflux accumulator to remove excess water (9). The pure carbon dioxide product gas is then ready for direct use or further processing.
A 'Typical' Amine CO2 Capture Package
A number of process components are added/modified/removed to suit the requirements of each individual application.
Value Adding
Process Group provides expertise in processing captured carbon dioxide for various applications including:
- Liquefaction for commercial use
- Wastewater pH control
- Enhanced oil/gas recovery
- Mineral sequestration
- Geo-sequestration
- Enhanced agriculture
Future Technologies
Process Group is closely associated with The Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC), which is a world-renowned leader and innovator in the identification and evaluation of solutions for carbon capture and storage. Process Group's participation in CO2CRC provides us with access to the latest advances in carbon capture technologies.
Project References and Case Studies
Process Group has successfully completed a wide variety or projects all over the world working with governments and name companies. Read the case studies below to learn more about some of our carbon capture projects and the technical solutions and value we delivered.
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