Influence of Hydrogen-Donating Agents on Product Distribution in Thermal Conversion Process Based on Molecular-Level Reaction Kinetics Model
To realize the optimization of delayed coking process and efficient utilization of heavy oil resources,a molecular-level reaction kinetics model of delayed coking was established based on the structure-oriented lumping method according to the thermal conversion reaction mechanism.Then the model was used to calculate the hydrocarbon group composition and typical molecular content in gasoline and diesel products under different process conditions,reveal the influence law of process conditions from the molecular level,and investigate the effect mechanism of different hydrogen-donating agents on the product distribution of delayed coking.The calculation results of the model show that tetralin can supply hydrogen free radicals effectively and improve the yield of liquid products.When mass fraction of 5％of tetralin is added,the yields of gas and coke of delayed coking products are decreased by 3.60％and 0.80％,respectively,and the liquid yield is increased by 4.40％.With the aim of increasing the yield of gasoline and diesel,catalytic cracking diesel is more suitable for blending and refining as the hydrogen-donating agent than coking diesel.
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维普
