PSB Industries has highlighted its skid-mounted temperature swing adsorption (TSA) systems for LNG dehydration and heavy hydrocarbon removal, designed to help operators meet increasingly stringent gas quality specifications while improving plant reliability and efficiency.
The Pennsylvania-based company, which specialises in gas and liquid purification systems, said its molecular sieve-based technology removes moisture and heavy hydrocarbon contaminants from natural gas prior to liquefaction, helping operators avoid operational issues that can disrupt production.
According to PSB, its LNG dehydration systems are engineered to reduce water content to below 1 parts per million by volume (ppmv) and achieve dew points lower than -100°C.
The company said removing moisture at this stage is critical to preventing ice and hydrate formation, which can lead to valve freeze-ups, instrumentation failures and damage to cryogenic heat exchangers and cold boxes.
The skid-mounted packages are available in single or multi-layer bed configurations and are designed for gas flows ranging from one to 200 million standard cubic feet per day (MMSCFD). Operating parameters include pressures between 150 and 1,450 psig and temperatures from 50°F to 122°F.
PSB noted that the systems are supplied as closed-loop units with zero gas losses during regeneration.
The automatic, heat-regenerative process uses dry product gas alongside either electric or gas-fired heaters, while optional heat integration with compression systems can further reduce operating costs.
Alongside dehydration, the company offers TSA-based heavy hydrocarbon removal systems capable of removing compounds such as C6+, naphthalene, benzene and toluene. These contaminants can cause freeze-ups in liquefaction trains and plate-fin heat exchangers, potentially resulting in off-spec LNG production.
Designed primarily for small-scale and peak-shaving LNG facilities, the heavy hydrocarbon removal units can be configured with open, semi-closed or closed-loop regeneration systems. Moisture and hydrocarbon removal can also be integrated into a single multi-layered adsorption bed, helping operators reduce capital expenditure and plant footprint.
All systems are fabricated, assembled and tested at PSB Industries' 350,000 sq ft manufacturing facility in Erie, Pennsylvania, enabling tighter control over project costs, schedules and delivery risk.
PSB Industries targets LNG efficiency with skid-mounted TSA systems
