2.3. Pyrolysis equipment
The pyrolysis reactor set-up consists of a fixed bed reactor (di = 20 mm, l = 335 mm), a vertically movable tube furnace (max 1.15 kW), two cooling traps designed like washing flasks (1st ice water cooled, 2nd cooled by a saturated NaCl solution, which was pre-cooled in a freezer to −18 °C), a mass flow controller to set the purge gas stream, a gas collection system composed of six gas sampling tubes (each with a volume of 1 l), and two filters. It is possible to take a gas sample of each gas sampling tube for analysis. The second cooling trap is filled with a defined amount of tetrahydrofuran acting as an absorbent to realize a nearly complete precipitation of condensable products.