Williams has completed the modernization and redesign of two existing Transco facilities located in Chatham and Scottsville, Virginia. The work began in early 2020 with the Southeastern Trail Expansion Project.
Modifications at the Chatham facility included the permanent retirement of ten legacy natural gas-fired reciprocating compressor engines and the commissioning of two new advanced combustion technology turbine compressors.
Modifications at the Scottsville facility included an increase in horsepower of an existing electric motor-driven compressor and the addition of one new advanced combustion turbine compressor.
The new combustion turbine exhaust systems are equipped with emissions control technologies. These facilities are the first Williams’ interstate natural gas transmission assets to implement turbine post-combustion selective catalytic reduction (SCR) emissions controls resulting in ultra-low nitrogen oxides (NOx) emission rates.
SCR systems are post-combustion emissions control technology installed on the turbine exhaust manifold. The system controls the turbine’s exhaust gas using a catalyst bed and ammonia injection grid to chemically convert NOx to nitrogen and water vapor.
