Gas Analyzers and the Liquid Threat: Prevention is Key

The Problem: Liquids are the nemesis of gas analyzers. These delicate instruments are designed for gas analysis, not handling liquids, which can damage them in various ways.

No Worries There is Now a Cutting Edge Solution

Understanding the Damage:

• Gas Chromatographs (GC): Liquid contamination damages the columns, requiring refurbishment or replacement.

• Aluminum Oxide Moisture Sensors: Overwhelmed by liquids, they need cleaning, drying, and recalibration.

• TDLAS Analyzers: Liquid-coated mirrors render them dysfunctional, requiring cleaning and realignment.

• Other gas analyzers: The damage depends on the technology used.

What Happens When Liquid Enters Gas Analyzers?

Preventing Liquid Ingress:

1. Sampling: Avoid sampling pipelines with free liquids. Address the issue at the source (refer to previous post: https://www.zegaz.com/post/where-do-liquids-originate-from-in-natural-gas ).

2. Sample Transport: Use heated probes and sample lines if the hydrocarbon or water dew point exceeds ambient temperature, preventing condensation.

3. Pressure Regulation: Be mindful of pressure reduction causing phase transitions and condensation.

Traditional Solution (with limitations): Membrane filters are used to separate liquids but require frequent inspection and replacement, and are only effective for minimal liquid entrainment.

The Question Remains: Is there a better way to prevent liquids from reaching gas analyzers?

Stay tuned for the next post exploring advanced solutions!