Olefin Production from Heavy Liquid Hydrocarbon Thermal Cracking: Kinetics and Product Distribution

Thermal cracking of a heavy liquid hydrocarbon was performed in a laboratory scale tubular reactor. Central Composite Design (CCD), was used as an experimental design method. The design variables were Coil Outlet Temperature (COT), feed flow and rate steam ratio. Maximum yield of ethylene was ۳۰.۳۷ wt% at COT, residence time and steam ratio of ۸۶۹oC, ۰.۲۰۸ s and ۱.۲۲ g/g, respectively. Maximum yield of propylene was ۱۵.۳۷ wt% at COT, residence time and steam ratio of ۸۲۵oC, ۰.۱۴۷ s and ۰.۹۵ g/g, respectively.  A mechanistic model based on free radical chain reactions was developed using experimental results. Developed reaction network contains ۱۴۸ reactions for ۴۳ species. Finally, the experimental data were compared with model results. Scatter diagrams showed good agreement between model and experimental data.

کلیدواژه ها:

Thermal cracking ، Heavy liquid hydrocarbon ، kinetic model