Dehydrating the gas prevents hydrate formation and protects pipeline, equipments from corrosion. Our company offers customized gas dehydration systems, for the removal of water vapor from gas streams, to the oil and gas industry. We offer our customers a range of suitable technologies that answers the issues of cost reduction, efficiency improvement and environment production.
The existing methods for gas dehydration in the field fall into two main groups: absorption (dehydration by liquid media) and adsorption (dehydration by solid media).
Typical units of dehydration include:

Absorption
- Glycol dehydration & glycol regeneration

Most natural gas producers use Triethylene glycol (TEG) to remove water from the natural gas stream in order to meet the pipeline quality standards. This process is required to prevent hydrates formation at low temperatures or corrosion problems due to the presence of carbon dioxide or hydrogen sulfide (regularly found in natural gas).
Absorption of water vapor in the TEG is the common method. The wet gas is brought into contact with dry glycol in an absorber. Water vapor is absorbed in the glycol and consequently, its dew point reduces. The wet rich glycol then flows from the absorber to a regeneration system in which the entrained gas is separated and fractionated in a column and reboiler. The heating allows boiling off the absorbed water vapor and the water dry lean glycol is cooled (via heat exchange) & pumped back to the absorber.

Absorption
- Molecular sieve

Molecular sieve dehydration units are used to give a very low water dew point to natural gas to allow for ethane extraction afterwards.
Molecular sieve adsorbents are crystalline alumina-silicates with their unique structure allows the water of crystallization to be removed, leaving a porous crystalline structure and aided by strong ionic forces caused by the presence of cation such as sodium, calcium and potassium, the molecular sieve will adsorb a considerable amount of water or other fluids. If the fluid to be adsorbed is a polar compound, it can be adsorbed with high loadings even at very low concentrations.
This strong adsorptive force allows molecular sieves to remove many gas or liquid impurities to very low levels.

Molecular sieve has been used:
» Where high outlet specification products are required.
» Where selective removal of certain components from a stream is desired.

- Silica Gel Adsorption
Silica gel was the desiccants used in absorption processes. The desiccant dehydration is a very simple process, ideal for remote locations with limited utilities, environment benefit, easy to install and operate.