“𝗜𝗳 𝗯𝗶𝗼𝗺𝗲𝘁𝗵𝗮𝗻𝗲 𝗶𝘀 𝗮𝗹𝗿𝗲𝗮𝗱𝘆 𝗼𝗻 𝘁𝗵𝗲 𝗴𝗿𝗶𝗱, 𝗶𝘀𝗻’𝘁 𝗶𝘁 𝗿𝗲𝗮𝗱𝘆 𝗳𝗼𝗿 𝗹𝗶𝗾𝘂𝗲𝗳𝗮𝗰𝘁𝗶𝗼𝗻?”

That’s a common assumption—and exactly where things often go wrong.

Grid biomethane meets grid specifications, but that doesn’t mean it’s suitable for cryogenic processes. For liquefaction—and certainly for LNG applications—the requirements are significantly higher.

Consider oxygen, moisture, and trace contaminants. Even small amounts of O₂ can cause problems at low temperatures. Moisture leads to ice formation, while other components can precipitate or cause fouling in cryogenic heat exchangers.

In addition, the specifications for grid gas and LNG fuel differ significantly. LNG requires much higher purity and stricter control over composition to ensure reliable storage and combustion.

That is why “polishing” is not a superfluous step, but a critical link in the process. Additional drying, oxygen removal, and fine purification make the difference between a stable installation and unexpected downtime.

In short:

Grid gas is a good starting point—but not yet a final product.

Are you working with biomethane toward liquefaction? Then the gains lie in the final percentage points of purity.

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