Abstract
Modeling Fluid Catalytic Cracking (FCC) riser reactors is of significance to FCC unit control, optimization and failure detection, as well as the development and design of new riser reactors. Under the guidance of catalytic reaction mechanisms and the demands for commercial production, a ten-lump kinetic model was developed for the TMP process in this study. The feedstock and products were divided into ten lumps by reasonably simplifying the reaction network, including heavy oil, diesel oil, gasoline olefins, gasoline aromatics, gasoline saturates, (butane + propane), butylene, propylene, dry gas and coke. Thirty-five sets of model parameters were estimated with the combined simulated annealing method and the damped least square method. The findings indicated that the model could predict the riser key products and their compositions quite well; thereby it could be useful to the production practice for the TMP process.
Highlights
Fluid Catalytic Cracking (FCC) serves as a key process in refining industry for converting heavy oil to valuable vehicle fuel such as gasoline and diesel
The role FCC plays in most refineries has been changing into converting low-value heavy oil into vehicle fuels and more valuable light olefins to meet the increasing demand of ethylene and propylene worldwide
This agrees well with the carbonium ion mechanism in FCC processes; (2) the activation energy of producing low-carbon olefin from cracking gasoline olefins is a little smaller than that of producing low-carbon alkanes, and the energy barrier that needs to be crossed in reactions of cracking gasoline olefins is much higher than that in reactions of cracking gasoline saturates
Summary
Fluid Catalytic Cracking (FCC) serves as a key process in refining industry for converting heavy oil to valuable vehicle fuel such as gasoline and diesel. Under the guidance of catalytic reaction mechanisms and the demands for commercial production, a ten-lump kinetic model was developed for the TMP process in this study.
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