The two columns are designed to measure axial temperature and concentration profiles. Both gas-phase and liquid-phase samples are taken with the aid of specially developed sampling flanges placed at 0.5 m intervals along the packing height.
Liquid trickles into the upper tube at the tip of the device, flows through the chamber and trickles out of the lower tube
With a syringe, the liquid can be taken from the chamber; liquid samples are collected and analysed off-line
A tube is inserted into the flange and connected to the gas chromatograph via a system of heated pipes and a vacuum pump
Gas-phase samples are analysed online
Instrumentation and control
Process Control System DeltaV from Emerson Process Management