Supercritical Fluids in Reaction Engineering
Case 1: Pressure Control
Case 2: Stable Mass Delivery
Teledyne Isco syringe pumps are well suited for use with CO₂ and provide the best in accuracy and reli- ability. Flow rate accuracy is +/- 0.5 % or better, and flows are pulseless. Pulseless flow means fluid pressure and density are constant, without changes in solvating prop- erties. Pumps can be operated in either constant flow or constant pressure. For continuous operation, dual pump systems deliver fluid in unattended operation. Pumps can be operated as stand-alone or via external control. Teledyne Isco syringe pumps have a “poor fill alarm” which can alert the user if changing to a full supply bottle is needed.
Cooling jackets are available to maintain proper fluid temperature in the pump. Special valve packages for dual pump systems are CO₂ compatible.
Figure 2: Configuration for pressure control of SFCO₂ density and solubility during reaction
