437823 Numerical Simulation of a Delayed Coking Reactor

Sunday, November 8, 2015
Exhibit Hall 1 (Salt Palace Convention Center)
Fabian A. Diaz Sr., Arlex Chaves, Maria Maraderi and David Fuentes, Universidad Industrial de Santander, Bucaramanga, Colombia

Delayed coking is the preferred choice of refiners for bottom of the barrel upgrading since it processes almost every type of residua. Inside a delayed coking reactor a feed of hydrocarbon residua is thermally decomposed into distillable products and coke. A numerical simulation of a delayed coking reactor at pilot plant scale was performed, a three phase system is proposed with two fluid phases (Vacuum residua and distillable product) and one solid phase (Coke). The kinetic parameters that model the reaction were obtained in a TGA. Continuity, momentum and energy balances were proposed to simulate the dynamics of the delayed coking process; these equations were discretized by the finite volume method. Coupling of the velocities and pressure was performed by a SIMPLE algorithm based on a pressure correction equation from a global mass balance. The simulator was programmed in C++ code, the result is a CFD unsteady simulation where products are formed and coke is accumulated through time.

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