Project Description:
Applied Sciences Group applied its expertise in real-time control systems to the liquefaction, storage and transport of carbon dioxide. An air separation facility recently expanded their "small plant" process to include CO² extraction from air, liquefaction, storage and dispensing wholly contained within the framework of a single building. Applied Sciences Group's role was to develop and customize the control software related to liquid CO² storage and its regulated dispensing to waiting tank trucks and rail cars.

Approach & Results:
The dispensing system consists of an array of sensors, valves, transducers, regulators and gas analyzers tied to a series of Allen-Bradley PLCs, which monitor storage tank parameters and fill zone (docking) attributes. The PLC software controls a series of interlocks and permissives that route the liquid from a selected tank to the appropriate fill zone. Applied Sciences Group also developed a separate Intellution package to provide supervisory control, report generation, alarming and remote digital access to each system.