CCUS, which stands for Carbon Capture, Utilization, and Storage, is a crucial technology in the global effort to reduce greenhouse gas emissions, particularly carbon dioxide (CO₂), from industrial processes and power generation. Traditionally, CO₂ is a byproduct of various industrial activities and has been released directly into the atmosphere, significantly contributing to climate change.
Innovative technologies are now being developed and implemented to capture CO₂ and compress it for transportation via pipeline. This facilitates options such as geological storage, enhanced oil recovery, or CO₂ utilization. A fundamental aspect of this process is CO₂ compression, which is essential for the efficient transport and storage of captured carbon.
CO₂ Compression
CO₂ enables the efficient transport of captured carbon dioxide to storage sites or utilization facilities. Once CO₂ is captured from the emission source, it must be compressed to reduce its volume and increase its density, facilitating its movement through pipelines. Additionally, compressing CO₂ is necessary for its injection into geological formations for long-term storage.
Despite its critical role in climate change mitigation, CO₂ compression faces several challenges, including but not limited to:
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Upon compression, CO₂ becomes dense and sometimes behaves like a fluid;
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Its extremely high density makes compression difficult;
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CO₂ exhibits complex thermodynamic behavior when reaches a supercritical point;
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It is highly corrosive in presence of water;
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At its critical point, CO₂ has a very low compressibility factor;
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Temperature < 50 ℃ lead to low compressibility (Z) and high sensitivity vs. pressure.
