Challenge
Propene is required for the manufacture of plastics and is delivered to the production site by tanker. After pressure equalisation between the transport container and the storage tank, the gas cannot be transferred in its entirety, leaving residual quantities in the system.

Solution
Piston compressors enable targeted re-compression of the gas and ensure that the transfer can be completed in full.

By adapting to variable inlet pressures, the process can be flexibly controlled and optimally adjusted to the respective operating conditions.

Implementation in Germany
In a liquefied gas transfer plant, an oil-free reciprocating compressor is used to further compress the propylene after pressure equalisation and continue the transfer into the storage tank.

The plant is designed so that different pressure conditions can be reliably equalised. This ensures continuous and efficient filling.

Results

• Complete LPG transfer with no residual quantities
• Reduced CO₂ emissions due to lower transport requirements
• Fewer tank wagons required
• More efficient and flexible plant operation