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High Pressure Reactor - Ultra High Vacuum Reactor

High pressure reactor system set-up

High pressure experiments up to 100 bar are performed in two flow reactors (pyrex in a stainless steel housing). Both systems are mass flow- and pressure-controlled. Temperatures up to 400°C can be adjusted in an oven lagging the reactor parts. Chromel-Alumel thermocouples are used to determine temperatures. Reaction products are analysed by gas chromatography and quadrupole mass spectrometry. For studies of the Fischer-Tropsch reaction, outflowing gases are heated to 150°C to avoid wax deposition. Waste gases are cooled to 25°C in a condenser and subsequently pass through a gas/liquid separator.

High-Pressure apparatus

UHV apparatus

UHV system set-up

An Ultra-High-Vacuum (UHV) set-up enables the study of catalytic and non-catalytic reactions at low reactant pressures (down to the 10-7 mbar regime). A pyrex/quartz micro-reactor is used and heated in temperature increments or according to a temperature program. A capacitance gauge is mounted along with an ionisation gauge to allow measuring pressures. A calibrated leak value system reduces pressures to the operating regime of a quadrupole mass spectrometer (BALZERS QMG-311).