PLAPIQUI   05457
PLANTA PILOTO DE INGENIERIA QUIMICA
Unidad Ejecutora - UE
capítulos de libros
Título:
Reactive distillation processes used as unique operation or finishing stage: A comparison
Autor/es:
JUAN P. ARCHENTI; MARIA SOLEDAD DIAZ; PATRICIA HOCH
Libro:
Computer Aided Chemical Engineering. Part B
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2012; p. 732 - 736
Resumen:
The main objective of this work is modeling and designing a reactive distillation unit
with rigorous hydraulic constraints, determining the configuration at the same time. The
RD unit is modeled using an equilibrium model (Taylor and Krishna, 2000) based on
first principles (mass and energy balances and phase equilibrium relationships). Two
different process schemes are proposed: one in which the reactive distillation unit
represents the only reactive operation within the process and one in which reactive
distillation is used as a finishing process, after a fixed bed adiabatic reactor stage. In
both schemes, the reactive stages are modeled as trays with catalyst bags (Jones Jr.,
1985). Two different optimization targets are evaluated: maximizing MTBE product
purity and maximizing isobutylene global conversion to MTBE. The unit is sized
according to rigorous hydraulic considerations (Stichlmair and Fair, 1998), while the
number of reactive and non-reactive trays is estimated within an MINLP problem. Cost
estimations are provided. Results for process variables are summarized for industrial
size designs.
Results show that lumping reaction and separation unit operations reduces the cost for
the process equipment and also the energy consumption, still obtaining a similar process
performance since product purity and reactant conversion are very similar to those of
conventional processes