June 2009

Gas Processing Developments

Minimize vaporization and displacement losses from storage containers

Consider using this new calculation for recovery

Bahadori, A., Curtin University of Technology

A storage tank is generally not pumped completely dry when emptied. The vapor above the remaining liquid will expand to fill the void space at the liquid's vapor pressure at storage temperature. As the tank fills, vapors are compressed into a smaller void space until the set pressure on the vent/relief system is reached. Some filling losses are associated with the liquid expansion into the tank. Vapors emitted from a storage tank's vents and/or relief valves are generated in two ways: Tank vapors forced out during filling operations (displacement losses) Vapors generated by liquid vaporization stored in the tank. Storage classification. There are two types of storage classi

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