Louisiana agency seeks permit input on Sabine Pass LNG expansion project

The Louisiana Department of Environmental Quality issued a March 5 notice of air permitting for an expansion of the Sabine Pass LNG project, which includes gas-fired turbines that will help operate the liquefied natural gas (LNG) facility.

The DEQ’s Office of Environmental Services will conduct an April 9 public hearing to receive comments on a proposed PSD air permit modification and Part 70 air operating permit modification and the associated Environmental Assessment Statement (EAS) for Sabine Pass LNG LP, Sabine Pass Liquefaction LLC and Sabine Pass Liquefaction Expansion, LLC for the Sabine Pass LNG Terminal. The facility is located at 9243 Gulf Beach Road, Johnson Bayou, Cameron Parish.

The companies have asked for approval to construct the Natural Gas Liquefaction Train 5 and Train 6, which will be similar to Trains 1-4. The proposed equipment includes twelve refrigeration compressor turbines, two generator turbines, two thermal oxidizers, two diesel-fired generator engines, two flares, and fugitive emissions. Two diesel storage tanks will be constructed as insignificant sources.

Due to updated manufacturing data, Best Available Control Technology (BACT) for carbon monoxide (CO) emissions from the refrigeration turbines is reset to the originally proposed 58.4 ppm at 15% oxygen. Emissions from previously permitted turbines, flares, generators, and emission caps are also reconciled. A new emission cap is set up for the flares.

The Sabine Pass LNG Terminal is a major source under the PSD program. The project will result in a significant net emissions increase of the following pollutants: PM10/PM2.5, NOX, CO, VOC, and greenhouse gas (GHG). Therefore, PSD requirements, including BACT, apply. The selection of BACT was based on a “top down” approach.

Comments and requests for further public hearings must be received by the DEQ by April 13.

FERC also has this expansion project under review

The Federal Energy Regulatory Commission was taking comment until Jan. 12 on an environmental assessment (EA) for the Sabine Pass Liquefaction Expansion Project (SPLE Project). The SPLE Project involves constructing two new LNG liquefaction trains (referred to as Trains 5 and 6) and would increase the terminal’s capability to liquefy natural gas for export by 503 billion cubic feet per year (Bcf/y) (251.5 Bcf/y per liquefaction train).

The proposed liquefaction facilities consist of two ConocoPhillips Optimized Cascade LNG Process Technology Trains (LNG Trains 5 and 6), each capable of processing up to 251.5 Bcf/y (or 0.7 Bcf/d) of natural gas, with an average liquefaction capacity of 4.5 million tons per annum.

The SPLE Project includes these key facilities:

  • two liquefaction trains, including the pre-treatment and liquefaction facilities (each train would include six LM2500+ G4 gas turbine-driven refrigerant compressors);
  • one hydrogen sulfide (H2S) removal system for acid gas removal, including a thermal oxidizer unit, in each of the two liquefaction trains;
  • one heavies removal unit and associated equipment, including a condensate stabilizer system in each of the two liquefaction trains;
  • one wet flare and one dry flare for Trains 5 and 6;
  • five boil-off gas recycle compressors;
  • one 71,842-gallon (working) amine storage tank;
  • one 240,493-gallon condensate storage tank and one 100-gallons per minute (gpm) condensate pipeline send-out pump;
  • two LM2500+DLE (dry low emissions) gas turbine generators to supply additional electrical power;
  • two diesel-powered standby generators; and
  • one 1.53-million gallon demineralized water tank.
About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.