To become familiar with the pecularities of pyrolysis a set of rather "heavy organics" was collected, viz. C14-C20 alkanes and alkenes, inclusive some alkane carboxilic
acids and alcohols. According to the model a major point of interest should be the electrochemical activity of the pyrolytic gas [H2, H2O, CO2, radicals]. The collection was complemented with some petrol additives and organic redox couples.
My equipment allowed digital recording of weight, voltage and dc resistivity. Maxi nightlight cups were used, equiped with cotton and glassfiber wicks, to burn in
an atmosphere with controlled oxygen level and heat conductivity. Fuel consumption was related to the oxygen level and the heat conductivity of the gaseous ambient.
The study of pyrolysis in test tubes quickly got routines allowing visual observation of "pyrolytic" gas developed by submerged carbonized substrates. The electric resistivity was determined by using the nickel sheats of parallel oriented thermocouples
as electrodes. Inserting a small test tube into the larger one and connecting adjacent liquids by glassfiber cord the classical "half-cell" construction came within reach.
C14 - C16 - C18 - C20 n-alkane, 1-n-alkene, 1-n-alkane carboxilic acid/alcohol
Ferroce, MMT, benzoquinone, tetrabromoquinone, tetramethylquinone
Toploading balance (Snug 150/0.005g); recording digitally weight (Excel graphs)
(Keithley 614); recording digitally voltage and resistivity
Maxi nightlight cup, equiped with standardized cotton/glassfiber wick
Pyrex test tube, equiped with 2 nickel sheated thermocouples & temperature monitor
Air thermostat (Bosch
GHG 660 LCD)
Cotton/glassfiber wick, equiped with Pt/Pt-Ir thermocouple/electrode (Ø50micron)
Glass bell, equiped with gas distribution (Air/oxygen/nitrogen/helium/carbondioxide)
Oxygen monitor (Greisinger GOX 100), recording