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Liquid CO2 for transport, Carbon Capture and Storage insights

Learn about the risks, and best practices for handling and measuring liquid CO2 (LCO2). As companies focus on reducing emissions and achieving sustainability goals through carbon capture and storage (CCS) and bulk transport, addressing challenges such as low-pressure sampling, corrosion, and trace impurity detection is essential for maintaining system reliability and preventing operational risks.

Small pipe Liquid CO2 heavy corrosion transport, carbon capture and storage

Application and challenges of liquid CO2

Carbon Capture and Storage (CCS) and maritime transportation

Projects around the world involve the capture of CO2 from industrial sources, its liquefaction, and transportation via LCO2 carriers to an onshore receiving terminal. From there, the liquid CO2 is transferred through pipelines to a subsea geological storage site sometimes over more than 2,500 meters (8,200 feet) beneath the seabed for permanent sequestration​​.

Equinor's Scope for CO2 capture, transport, and beneath the seabed storage
Equinor’s Scope for CO2 capture, transport, and beneath the seabed storage. Source: The Northern Lights project – Equinor

The challenges of handling liquid CO2

Liquid CO2 streams often contain a wide range of unwanted components, making it a significant challenge to provide a complete analysis while maintaining cost-effectiveness. Handling LCO2 in industrial applications like for Carbon Capture and Storage (CCS) involves exposure to trace impurities that can cause equipment corrosion, leading to unplanned downtime, and costly repairs. Another challenge is achieving proper impurity analysis, which relies on obtaining verifiably accurate and representative samples, even in low-pressure scenarios.

Small pipe Liquid CO2 heavy corrosion transport, carbon capture and storage
Heavy corrosion

Key challenges and common pitfalls with in LCO2

Impurities and corrosion: Corrosive compounds and accurate impurity analysis in cryogenic conditions.

Reducing costs: Complete analysis while maintaining cost-effectiveness.

Accurate and representative samples: even in low-pressure scenarios.

Solutions for liquid CO2

Reliable analytical systems are essential for applications such as carbon capture and storage (CCS), maritime transport, and small-scale biogas plants. These systems should provide fast, high-resolution analysis of various CO2 impurities, ensuring reliable corrosion control and precise monitoring of critical components across different industrial processes.

Reliable liquid CO2 sampling in low-pressure conditions


The cryogenic sampling process begins with specialized probes designed to handle liquid CO2 sampling at pressures as low as 0.5 barg. This ensures accurate and representative samples even in low-pressure scenarios, making it suitable for applications such as ship-to-ship transfers, storage facilities, and truck loading operations.

Achieving cost-efficiency through analyzer technologies

Gas analyzers should be selected for comprehensive measurement capabilities for liquid CO2 streams. Technologies such as FTIR, Gas Chromatography, XRF, and electrochemical sensors enable detection of various impurities, including sulfur, oxygen, mercury, and hydrocarbons. A combination of the above technologies is needed for reliable impurity analysis, and in turn helps to manage corrosion risks to maintain process integrity.

  • Carbon Dioxide
  • Water vapor
  • Oxygen
  • Carbon Monoxide
  • Ammonia
  • Oxides of Nitrogen
  • Nitrogen Dioxide
  • Nitric oxide
  • None-volatile Residue
  • None-volatile Organic Residue
  • Methanol
  • Total Hydrocarbons as Methane
  • Total Non-Methane Hydrocarbons
  • Acetaldehyde
  • Aromatic Hydrocarbon
  • Total Sulfur as Sox
  • Hydrogen Sulphide
  • Sulfur Dioxide
  • Odor and appearance of solid CO2 (Snow)
  • Odor, taste and appearance in water
  • Hydrogen Cyanide
  • Vinyl Chloride
  • Phosphine
  • Ethylene Oxide
  • Hydrogen Formaldehyde
  • Mercury
  • Nitrogen
  • Argon Ethanol
  • Total VOC’s
  • Mono-Ethylene Glycol
  • Ethylene
  • Hydrocabons (C3+)
  • Ethane
  • Tri-Ethylene Glyco
  • Amines
  • Cadmium
  • Thallium
  • Solid Particles

Provide transparency for carbon credits and compliance with the right software

Software should ensure compliance with ISBT and EIGA standards for food-grade CO2 while simplifying carbon credit accountability. By automating standardized reporting, it should provide accurate certification and transparent monitoring. It should also include algorithms that predict potential analyzer and sample system issues before they occur, reducing downtime and improving reliability.

ASaP liquid CO2 line-up for transport, Carbon Capture and Storage

Achieve peak operation with the complete ASaP liquid CO2 analytical systems. From Carbon Capture and Storage, to transport, our LCO2 systems deliver precision, corrosion control, and exceptional value per measured component.

Key benefits of a best practice analytical package for LCO2

Cost-effective analysis: Fast and high-resolution analysis of all possible CO2 impurities. Exceptional value per measured components.

Corrosion control: Reduces maintenance costs and extends equipment lifespan for operational confidence.

Low-pressure sampling: Provides verifiably accurate and representative CO2 samples from as low as 0,1 barg.

Compliance: Adheres to ISBT and EIGA and other international standards and ensures credibility and transparency for carbon credits.

Liquid CO2 Products Line Up for Transport, Carbon Capture and Storage - LCO2 sample probe, LCO2 Sampler, Analyzers, AIM

Black Box Measurement Solution (BBMS) for Liquid CO2

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Frequently asked questions about liquid CO2

What is carbon capture?

Carbon capture is the process of capturing CO2 emissions from industrial processes, power plants, or directly from the atmosphere to prevent it from entering the atmosphere. This captured CO2 can then be stored underground in geological formations (carbon storage) or utilized in various applications (carbon utilization). Carbon capture is a key technology for reducing greenhouse gas emissions and combating climate change.

Why can’t CO2 be liquid under normal conditions?

CO2 cannot exist as a liquid under normal atmospheric pressure because it transitions directly from a solid (dry ice) to a gas in a process called sublimation at standard atmospheric pressure. To form liquid CO2, it must be pressurized above 5.1 atmospheres (its triple point pressure) and kept at temperatures between -56.6°C and 31°C. These conditions are necessary to overcome the physical limitations of CO2’s phase behavior.

Why is long-term liability an issue for carbon capture?

Long-term liability is a concern for carbon capture because stored CO2 must remain securely sequestered underground indefinitely to prevent it from leaking back into the atmosphere. Managing risks like containment failure, induced seismicity, or environmental damage requires robust monitoring, maintenance, and regulatory frameworks. Additionally, liability for future issues can create financial and legal challenges, discouraging investment and complicating the development of large-scale carbon capture projects.

Why choose ASaP for a liquid CO2 solution?

From sampling to analysis, ASaP offers a complete “pipe to byte” solution, providing seamless integration of systems and unmatched reliability for liquid CO2 operations. ASaP’s experienced engineers specialize in providing tailored solutions for complex liquid CO2 applications, from carbon capture and storage (CCS) to industrial and maritime transport. Our expertise ensures reliable and efficient operations.

Contact our Liquid CO2 specialist today

For personalized assistance and further Liquid CO2 inquiries, please contact our specialist at ASaP. We are here to help and provide the support you need.

Contact our Liquid CO2 specialist directly

You can contact us is you have a question about Liquid CO2 when it suits you. See our specialist’s contact information below.

Hans-Peter Visser - ASaP - Address and contact persons

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LNG CTMS for industry leaders-Last week, Analytical Solutions and Products BV successfully conducted a Factory Acceptance Test for two LNG Custody Transfer Measurement Systems, in collaboration with Emerson’s Automation Technologies & Solutions, Bechtel Oil, Gas, & Chemicals, and end-user NextDecade. These systems are integral to NextDecade’s Rio Grande LNG project, which is advancing towards a net-zero future.

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ASaP Hans-Peter Visser, Martin van Burgh, Lindert van der Hart, at LNGCON 2025 - Amsterdam, the Netherlands - March 10-11

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About Liquid CO2 and Analytical Solutions and Products

With Liquid CO2, ASaP delivers comprehensive and practical solutions tailored to your analytical requirements. Our complementary package of services and products ensures the most effective outcomes for your analytical challenges. Through strong collaboration with industry partners and a dedicated team spirit, we specialize in designing, building, locally installing, and commissioning custom sample probes, analyzer systems, and shelters. All solutions are crafted to meet the latest industry standards and certifications.

ASaP is your trusted partner for analytical solutions, offering a full-service package that includes engineering, distribution, manufacturing, software development, offshore services, system integration, and advanced gas analysis technologies. We excel in solutions such as bio-LNG and LNG Custody Transfer Systems (CTMS), LNG Probe-Vaporizers, advanced LNG Sampling Systems, and precise natural gas analysis systems. Reach out to our team for more information about Liquid CO2 or any other analytical needs!