Basic Study on Pyrolysis of Crude Oils for Olefin Production by Use of Fluidized Bed Reactor

The basic study on pyrolysis of crude oils for olefin production was made by use of a fluidized bed reactor containing carbon particles. Seven crude oils were tested. Kuwait, Minas crudes, and Kuwait distillates and residues were examined particularly in detail. Pyrolysis conditions were: temperaturer 750∼850°C; residence time, 0.2∼1sec; and the steam to hydrocarbon dilution ratio by weight 0.5∼2. The yields of products were plotted against the modified characterization factor (K=3√TB'/d) of the respective feed. Changes in the product yields with pyrolysis severity were represented in terms of the intensity function (IF=T•θ0.06). These monographs provide the means for estimating the pyrolysis results of any crude oil with known 50% distillation point (TB', °R) and specific gravity (d, @ 60°F) at given reaction temperature (T, °F) and residence time (θ, sec) with steam dilution.