Port Arthur LNG LLC has applied to the Texas Commission on Environmental Quality (TCEQ) for issuance of air permits that would authorize construction of the Liquefied Natural Gas Plant and Export Terminal located on TX 87, approximately 5.3 miles south of the intersection of TX 82 and TX 87 in Port Arthur, Jefferson County.
The TCEQ said in a Dec. 18 notice, posted to its website on Dec. 21, that this application for multiple permits was processed in an expedited manner. This application was submitted to the TCEQ on April 10, 2015. The executive director has determined that the emissions of air contaminants from the proposed facility which are subject to PSD review will not violate any state or federal air quality regulations and will not have any significant adverse impact on soils, vegetation, or visibility. All air contaminants have been evaluated, and “best available control technology” will be used for the control of these contaminants. The executive director has completed the technical review of the application and prepared a draft permit which, if approved, would establish the conditions under which the facility must operate.
The proposed liquefaction plant will consist of two liquefaction trains, each capable of producing 5.0 million metric tonnes per annum of liquefied natural gas (LNG). Each LNG train will consist of one propane and one mixed refrigeration compression turbine and an Acid Gas Removal Unit (AGRU). Pipeline quality natural gas will be delivered from interconnecting intrastate pipeline systems. The natural gas will be treated to remove acid gases (carbon dioxide and sulfur compounds) with an amine treatment process. Emissions from the AGRU will be controlled with a thermal oxidizer. Water, mercury, and heavy hydrocarbons will also be removed from the natural gas.
The treated natural gas is then sent to the liquefaction process where the gas is cooled to become a liquid. The LNG will then be stored in one of three LNG storage tanks and loaded onto a marine vessel for export at the marine berthing area. The proposed project will include the following new emission points:
- Four General Electric Frame 7EA gas-fired refrigeration compressor turbines, two with waste heat recovery
- Nine GE PGT25+G4 simple cycle gas-fired combustion turbine electric generating units
- One marine flare
- One ground flare
- Two gas-fired fuel pre-heaters
- Two thermal oxidizers
- Three diesel-fired engine standby generators
- Five diesel-fired engine fire water pumps
- Nine diesel storage tanks
- Two amine storage tanks
- Two oil storage tanks
A project contact is: Port Arthur LNG LLC, Kerry Higgins, Director Technical Services, (281) 446-7070.