CCUS Technology

- Overview

Carbon Capture, Usage and Storage (CCUS) is a critical decarbonization technology that captures CO2 emissions from industrial sources and power generation, preventing their release into the atmosphere. 

Captured CO2 is either repurposed for products (e.g., fuels, building materials) or permanently stored underground. CCUS enables emission reductions in hard-to-abate sectors, such as cement and steel.

CCUS acts as a vital tool in the transition to net-zero, particularly for industries where emissions are an unavoidable part of the process.

1. Key Aspects of CCUS Technology: 

• Process Chain: The CCUS value chain involves three main stages: capturing CO2 from emissions, transporting it via pipelines or ships, and either utilizing it or storing it permanently in deep geological formations.
• Decarbonization Role: It is essential for meeting global climate targets, specifically for reducing emissions from heavy industry and providing low-carbon power generation.
• Technology Maturity: While some components are deployed at scale, others are still in development. The Technology Readiness Level (TRL) scale is used to measure maturity from laboratory to market. 

2. Applications:

• Usage (CCU): Turning CO2 into products like synthetic fuels, chemicals, or building materials.
• Storage (CCS): Injecting CO2 into underground or subsea geological formations for long-term sequestration.

3. Challenges: 

High costs and energy intensity are significant barriers, with capture alone accounting for a large portion of the total cost.

- Key Components and Processes of CCUS

Carbon Capture, Usage and Storage (CCUS) is a critical, multi-stage technology for decarbonization that captures CO2 from industrial emissions for utilization or permanent underground storage. It requires the synchronized development of capture, transport, and storage infrastructure. 

While some methods are deployed at scale, others need further development, with Technology Readiness Levels (TRL) used to assess maturity. 

1. Key Components and Processes:

• Capture: Technologies like chemical absorption, membrane separation, or oxy-fuel combustion capture CO2 from industrial sources.
  
• Transport: Captured CO2 is compressed and transported via pipelines, ships, or trucks.
  
• Storage & Usage: CO2 is stored in deep geological formations (e.g., saline aquifers, depleted oil fields) or utilized in products like concrete, chemicals, and synthetic fuels.

2. Challenges and Maturity:

• Maturity Levels: Many components are at different TRLs, with some, such as certain chemical absorption methods, already in large-scale use.
• Barriers: High costs, particularly for capture and compression, hinder widespread adoption.

3. Future Outlook: 

Further research into advanced sorbents, high-performance membranes, and electrochemical techniques is ongoing to improve efficiency and lower costs. 

- CCUS Technology Readiness Level (TRL) Scale 

The IEA extended the 1-9 TRL scale to 11 for CCUS to better reflect commercial integration and scaling needs for energy policy. 

TRL 10 represents competitive technologies needing integration into wider energy systems, while TRL 11 signifies fully integrated, predictable growth. 

This expanded scale helps address the challenges of moving CCUS from single projects to widespread deployment in energy systems.

Expanded IEA TRL Scale for CCUS:

• TRL 1-3: Research and Proof of Concept
• TRL 4-6: Development and Demonstration in Relevant Environments
• TRL 7-8: Demonstration and Qualification in Operational Environments
• TRL 9: Fully Commercial and Proven
• TRL 10: Commercial, Competitive, but Needs Further Integration
• TRL 11: Mature with Predictable Growth

- The Four CCUS TRL Readiness Categories 

The International Energy Agency (IEA) categorizes Carbon Capture, Utilization, and Storage (CCUS) technologies into four readiness levels based on their Technology Readiness Level (TRL) and market adoption. 

All CCUS technologies projected to contribute to the Sustainable Development Scenario before 2070 are currently at least at the prototype stage.

• Mature: This category includes commercial technologies with widespread deployment and only incremental innovations expected. All designs and underlying components are at TRL 11. Examples include hydropower and electric trains.
• Early Adoption: Technologies in this category have at least one underlying design at TRL 9 or higher. Some designs have reached the market but require policy support for full-scale deployment. Examples include offshore wind, electric batteries, and heat pumps.
• Demonstration: These technologies have at least one design at TRL 7 or 8, but no underlying design at TRL 9 or above. Examples include carbon capture in cement kilns, electrolytic hydrogen-based ammonia and methanol, and large battery-electric ships.
• Prototype: This stage includes technologies with at least one design at TRL 5, but none at TRL 7 or 8. Examples include ammonia-powered vessels, electrolytic hydrogen-based steel production, and Direct Air Capture (DAC).

[More to come ...]