Carbon capture, utilization, and storage (CCUS) is critical for decarbonizing hard-to-electrify industries and those reliant on hydrocarbon-based feedstocks. The International Energy Agency (IEA) reports a significant rise in CCUS projects, with over 500 in development worldwide.

System designs for CCUS vary, with pre-combustion capture offering high efficiency due to high CO2 concentration in syngas but at a high capital cost. Post-combustion capture, while less efficient due to lower CO2 concentration in flue gas, is well-established and viable for retrofits. Oxy fuel combustion, which burns fuel with pure oxygen, yields high CO2 concentration in flue gas, eliminating the need for downstream separation, though the cost of oxygen production is high.

Siemens Energy has advanced CO2 compression units featuring integrally geared compressors (IGCs), which provide intercooling after each stage. This is crucial for handling CO2‘s high molecular weight, reducing isentropic power requirements, and enabling waste heat recovery for reuse in the capture process or district heating.

Despite these advancements, the IEA warns that the industry is still behind in achieving the Net Zero Emissions by 2050 Scenario. Accelerating CCUS adoption requires reducing development costs and fostering investment and collaboration across the value chain. Continued innovation and cooperative efforts are essential to unlocking CCUS’s full potential for a greener future.