The pyrolysis of a heavy high sulphur crude oil in an inert fluidized bed at temperatures between 550 and 800°C. has resulted in the production of an olefin rich gas and a liquid product containing increasing amounts of aromatic material with increasing temperature.
Analysis of the process gas has shown that for average reactor residence times of more than one second, equilibrium is approximated for the system ethane-ethylene-hydrogen. There is considerable scatter in the data for the analogous system propane-propylene-hydrogen but for most conditions a significant deviation from equilibrium exists.
The sulphur compounds in the light oil were of thiophenic character. The ratio of 2- to 3-methylthiophene in the toluene fractions was examined.