Modeling and Optimization of a Cracked Naphtha Post-Treater
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: March 28, 2017
- Duration: 30 minutes
- PDHs: 0.50
The selective hydrogenation and hydrotreating reactors are modeled as plug flow reactors, with detailed reaction networks that include hydrogenation of olefins/dehydrogenation of paraffins, mercaptan, thiophene and benzothiophenes species desulfurization, and the recombination of olefins with H2S to form mercaptan species. The reactions in oxidizer reactor of the caustic treatment unit are considered to reach equilibrium between the reacting mercaptans and disulfide products.
Different scenarios were simulated while varying the cut point in the naphtha splitter, solvent flowrate and caustic concentration in the caustic treatment unit, and reactor temperature, hydrogen to hydrocarbon ratio in the hydrotreater unit to study their effect on sulfur removal, hydrogen consumption, and research octane number of the product. Optimum conditions were selected for a maximum octane barrel of final product that meets a cracked naphtha sulfur specification between 10-30 ppm.
|AIChE Member Credits||0.5|
|AIChE Fuels and Petrochemicals Division Members||Free|
|AIChE Graduate Student Members||Free|
|AIChE Undergraduate Student Members||Free|