Chisholm Cryogenic Gas Plant

Project overview

• Greenfield cryogenic gas-processing plant
• 120-MMSCFD capacity
• Gas subcooled process (GSP)
• Propane refrigeration
• Amine treatment for CO2 removal
• Residue reciprocating compression
• Solar turbine
• Plant utilities (flare, drain, power, instrument air)

Scope of work

• Project management
• Detailed engineering & design
• Automation & control
• Construction
• Process safety analysis
• Power generation
• Fabrication

Project summary

Audubon was contracted by Energy Transfer for engineering, design, procurement, fabrication, and construction on a greenfield refrigerated turboexpander plant with 120-MMSCFD capacity. The Chisholm cryogenic gas plant in South Texas is connected to an interstate transportation pipeline system that delivers residue gas and natural gas liquids (NGLs).

The plant was designed to extract 92% of ethane and 100% of heavy hydrocarbons from rich natural gas feed streams. Plant design also included a 330-GPM amine-treating unit for CO2 removal from inlet gas and Y-grade liquid products, 2,050 HP of electric motor–driven screw refrigeration compression, and 9,000 HP of turbine-driven centrifugal recompression.

With the new cryogenic gas plant engineered by Audubon, Energy Transfer can effectively cool natural gas and recover NGLs.