top of page

Appropriate Glycol/Water Ratios

Glycol-Water Ratios in Gas Dehydration

Gas dehydration is a crucial process in the midstream natural gas industry, ensuring the removal of water from gas streams to prevent operational issues and pipeline corrosion. Among the essential components of gas dehydration units is the glycol-water ratio. While this ratio may seem like a minor detail, its significance in maintaining efficiency and preserving equipment integrity cannot be overstated. In this article, we delve into the essentials of glycol-water ratios, shedding light on their importance for professionals in the midstream natural gas sector.

A critical aspect of gas dehydration units, the glycol-water ratio refers to the proportion of glycol to water in the dehydration system. This ratio plays a pivotal role in the absorption of water vapor from the natural gas stream. By optimizing the glycol-water ratio, professionals can enhance the efficiency of the dehydration process, ensuring that water content in the gas stream meets industry standards.

Maintaining the correct glycol-water ratio is essential for achieving optimal dehydration performance. A balanced ratio ensures that the glycol can effectively absorb water vapor from the gas stream, preventing moisture-related issues downstream. Professionals must carefully monitor and adjust the glycol-water ratio to uphold the system's efficiency and protect the integrity of critical components.

During the sizing of your TEG unit, utilize 2-4 gallons of glycol/lb of water. If you have plenty of "space" in your tower with theoretical stages, you may drop it as low as 1.8 gallons glycol/ lb of H2O. It is not recommended to design outside of those parameters. Some documents show ratios between 2-7, but that is intended for use in the field when the gas conditions change and it's not drying. Design the system so our field professionals have options when gas conditions vary. Try sizing a couple of applications at and see the impact of this critical number to the overall design.

An incorrect glycol-water ratio can have far-reaching consequences for gas dehydration units. Insufficient glycol concentration may lead to inadequate water removal, resulting in wet gas downstream. Conversely, an excess of glycol can escalate operational costs and compromise the system's effectiveness. Professionals need to strike a precise balance in the glycol-water ratio to maintain consistent and reliable dehydration performance.

To optimize gas dehydration processes, professionals should adhere to best practices in glycol-water ratio management:

  • Regularly monitor glycol concentration levels

  • Conduct routine sampling and analysis to assess the effectiveness of the dehydration system

  • Adjust the glycol-water ratio based on operating conditions and gas stream characteristics

  • Employ advanced technologies for real-time monitoring and control of glycol levels

By focusing on glycol-water ratios, midstream natural gas professionals can enhance operational efficiency, minimize downtime, and prolong the lifespan of gas dehydration units. Maintaining the correct ratio is a proactive measure that ensures uninterrupted gas processing and reduces the risk of costly repairs or replacements.

Now armed with a deeper understanding of glycol-water ratios, professionals can navigate the complexities of gas dehydration with confidence and expertise.

Keywords: gas dehydration, midstream natural gas, glycol-water ratio, gas processing, dehydration efficiency

8 views0 comments


bottom of page