The best use
of biogas is bio‑LNG.

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iLNG technology explained
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Bio‑LNG is now! It's the solution for maritime and long‑haul road transport. Nordsol leads the way with cutting‑edge technology to convert your biogas into bio‑LNG. It boasts the lowest CO₂ emissions in the industry, making it a frontrunner in reducing environmental impact. This results in the cleanest product ‑ bio‑LNG of the highest quality.

Small scale, decentralized production

While large-scale fossil LNG production has been a longstanding technology, the game changes when it comes to small-scale, decentralized production of bio‑LNG from biogas. Decentralized production allows for more flexible and localized energy solutions.

Bio‑LNG can be produced and used within close proximity, reducing transportation costs and emissions, and supporting local economies. Moreover, it aligns with circular economy principles by efficiently using local waste. Nordsol’s bio‑LNG sites are designed to suit local conditions to reduce environmental impact.

Our breakthrough bio‑LNG technology explained

iWater removal
iVOC & H2S removal
iBiogas compressor
iMembranes
iFlash-2-Sweep membranes
iBooster compressor
iRecycle gas compressor
iTurbo expander
iHeat exchanger
iSwirl separator
iBio-LNG storage tank
iCO2 compressor
iBio-CO2 condensor
iStripper
iReboiler
iBio-CO2 storage tank
Legenda
In
Out
Out
Step 1

Upgrading biogas to liquefaction-ready
biomethane with membranes only

After the removal of water, H2S and VOCs, biogas flows through membranes in which the CO2 and methane in the biogas are separated. This is a continuous process that does not require consumables. With the patented Flash-2-Sweep technology the performance of the membranes increases 20 times, resulting in liquefaction-ready biomethane without the need for molecular sieves or chemicals.

Step 2

Robust liquefaction of biomethane to bio-LNG

Biomethane is liquefied to bio-LNG by decreasing the temperature to minus 150 degrees Celcius. The phase change from gaseous to liquid biomethane does not happen in the heat exchanger (like in other processes) but in the swirl separator. This avoids cold shocks and reduces the risk of freeze-outs in the heat exchanger. It makes the process even more reliable and simplifies the startup procedure. Flash gas from the bio-LNG storage tank is used to sweep the membranes in the biogas upgrading step.

Step 3

Energy-efficient cooling with reverse Brayton process

The cooling process is based on the reverse Brayton cycle. Nordsol uses biomethane as the refrigerant, which makes it the most efficient reverse Brayton cycle in the required temperature range. The key to the success of this process lies in the successful integration of a biomethane turbo expander in the bio-LNG process. The chosen technology combines the best of two worlds: low equipment count, low refrigerant inventory (safety), easy to operate, and maintaining a high efficiency.

Step 4

Integrated bio-CO2 liquefaction

Bio-CO2 liquefaction is integrated in the bio-LNG production installation. Liquefaction and reuse of the captured CO2 further lowers the carbon intensity of the production process. In addition, residual methane in the CO2 gas stream is fed back to the membranes rather than vented. It is a closed system with zero methane slip. Liquid bio-CO2 displaces fossil CO2 in the industry.

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Lowest Total Cost of Ownership

Our bio‑LNG technology is a model of energy efficiency, using proven and less complex methods to make small-scale production cost-effective. With integrated CO₂ capture and liquefaction, our process achieves low carbon intensity and zero methane slip, which depending on feedstock can result in a negative carbon intensity index.

We use only membrane technology for CO₂ removal, avoiding the need for consumables and heat, and minimizing maintenance, thus enhancing our operational efficiency.

Moreover, our robust liquefaction process, based on the reverse Brayton cycle with methane expansion and flash cooling, ensures continuous production with minimal downtime. These innovations collectively help in reducing not just the initial investment but also the ongoing operational costs.

Easy to operate, unmanned plant

At Nordsol, we’ve designed our bio‑LNG plants with a focus on ease of operation, allowing for unmanned functioning. Our user-friendly approach integrates biogas treatment and liquefaction into a compact, energy-efficient system. This design simplifies operations and reduces energy consumption. We’ve implemented unmanned operation and remote monitoring capabilities, enabling continuous, 24/7 operation without onsite staff, which cuts labor costs and boosts safety and efficiency.

Additionally, our plants feature a self-service offloading process, where the fuel truck driver performs offloading, enhancing operational simplicity and efficiency. Our plants run efficiently, reliably, and without the need for constant human supervision.

Independence from grid connections

Bio‑LNG, as liquefied biomethane, has a higher energy density than biomethane in its gaseous form. This makes it more efficient to store and transport over longer distances.

While gaseous biomethane often requires a connection to a local gas grid for distribution, bio‑LNG can be transported like conventional LNG, using tankers and containers, making it more adaptable to areas without established gas grid infrastructure.

Bio‑LNG can be stored for longer periods without significant energy loss, offering greater flexibility and independence from immediate consumption needs.

iLNG technology explained

We decarbonize long‑haul transport

Decarbonizing long-haul, heavy-duty transport – trucks and ships – is challenging, yet crucial for reducing global warming. With its volumetric energy density being three times higher than hydrogen – a feature also utilized in rockets – bio-LNG emerges as a leading solution for these vehicles, especially perfect for long distances.

Let’s join forces to lower CO₂ emissions by replacing diesel and other fossil fuels with bio‑LNG: a cleaner, safer, advanced biofuel.

Wake up.
Bio‑LNG is now.

4 reasons
to join us.

  • 1 Smart business case

    Bio‑LNG has superior economic value. Experience unparalleled energy efficiency and process reliability at the lowest production costs and maximize your profits.

  • 2 Dedicated experts

    Access to our team of experts dedicated to your bio‑LNG project's success, from planning to operation. Ensuring you're not alone in navigating the process.

  • 3 Environmental impact

    Choosing Nordsol means joining a collective effort to address environmental challenges, by making bio‑LNG mainstream and contributing to a sustainable future.

  • 4 Long-term partnership

    Nordsol offers ongoing support beyond plant installation, including maintenance and performance optimization, ensuring a long-term partnership for success.

7 Reasons for on‑site bio‑LNG production now.

Learn how biogas producers significantly enhance both the ecological and economic value of their biogas through bio-LNG production, utilizing Nordsol’s innovative biogas liquefaction technology.

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Your own, onsite bio‑LNG plant. High tech, turnkey.

We will guide you. Every step of the way. You can rely on our technical, operational, and strategic expertise and support. Together, we make decentralized, small-scale bio‑LNG production a reality. Onsite, right next to your biogas installation(s). Using advanced technology, it operates fully automated, without requiring staff.

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