Gas/Solid Separation Technology – Shell St. Fergus Gas Plant
Improving Gas Filtration and Protecting Downstream Cryogenic Equipment

The Challenge

At Shell’s St. Fergus Gas Plant, improvements were required to the filtration systems on the gas dehydration trains to support increased operational capacity and system reliability.

Following dehydration, the gas passes through molecular sieve adsorption beds, reducing residual water content from approximately 60–80 ppm to less than 1 ppm. Silica gel is also used to limit gaseous glycol carryover.

Before entering the downstream cryogenic process, molecular sieve and silica gel fines greater than 1 micron must be removed. These contaminants can contribute to increased pressure loss, fouling and erosion of critical downstream equipment.

Our Solution

Rosenberg applied its Gas/Solid Separation Technology to develop an enhanced filtration solution capable of handling the required gas throughput while providing effective removal of fine particulate contaminants.

The solution was engineered around the requirements of the existing gas processing train, with particular focus on separation efficiency, low pressure loss and reliable operation.

The Result

Rosenberg’s engineered solution provides effective removal of molecular sieve and silica gel fines before the gas enters the cryogenic section, helping to protect downstream equipment, minimise fouling and erosion, and support increased plant capacity and reliability.

The project demonstrates Rosenberg’s expertise in applying specialist Gas/Solid Separation Technology to demanding gas processing applications.

Shell St. Fergus | Fine Particle Removal | Downstream Equipment Protection | Increased Capacity