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Título del libro: Ecos 2000
Título del capítulo: Exergy analysis of a diabatic distillation system for Naphtha stabilization

Autores UNAM:
RICARDO RIVERO RODRIGUEZ;

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Autores externos:

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Idioma:

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Año de publicación:
2000

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Palabras clave:

Binary mixtures; Condensation; Crude petroleum; Distillation columns; Entropy; Evaporation; Heat losses; Heat transfer; Naphthas; Reboilers; Diabatic distillation system; Exergy analysis; Naphtha stabilization tower; Rectification section; Exergy

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Resumen:

In this paper the application of diabatic distillation to a naphtha stabilization tower is evaluated using exergy analysis. Diabatic distillation is a separation process in which not only is heat supplied to the reboiler and extracted from the condenser (as in a conventional (adiabatic) distillation column), but also heat is transferred inside the column in order to approach operation to equilibrium conditions thus reducing exergy losses and increasing exergy effectiveness. In a Naphtha Reforming Unit of a refinery, the octane number of hydrodesulfurized naphtha is increased producing aromatic compounds and hydrogen. Before incorporating the reformed naphtha to the gasoline pool, it is necessary to stabilize it in a distillation column eliminating light components. The exergy losses of this stabilization process are about 22% of the total exergy losses of the Unit. A detailed exergy analysis tray-by-tray of the conventional adiabatic stabilization column is conducted for comparison purposes. Then the application of diabatic distillation to the system is considered at two levels: (1) A uniform distribution of heat supplied to each tray in the stripping section, including the reboiler, and a uniform distribution of heat extracted from each tray in the rectification section, including the condenser. (2) Heat is supplied only to one tray in the stripping section and the reboiler, and heat is extracted only from one tray in the rectification section and the condenser. The results in terms of the reduction of exergy losses, and heating and cooling media flowrates of the diabatic options are compared to the original adiabatic system, as well as the consequences in operation conditions of the distillation system and of the complete naphtha reforming unit.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9036514665
Editorial:

Tipo de producto:
Conference Paper