Dynamics of Packed Tower Distillation

Tommasi, Giulio; Rice, Philip

doi:10.1021/i260034a012

Cited by 11 publications

(2 citation statements)

References 4 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Srivastava and Joseph (1984) developed a model in which the two-point boundary value problem resulting from the heat and material balance equations of a packed column are solved using the orthogonal collocation technique. Tommasi and Rice (1970) investigated the transient response of the enriching section of a packed tower to a step change in reflux ratio. The solution to the case of a straight line equilibrium curve was adapted to a real case (with a nonlinear equilibrium curve).…”

Section: Previous Workmentioning

confidence: 99%

Transient analysis of heat pump assisted distillation systems. 2 Column and system dynamics

Salim

Sadasivam

Balakrishnan

1991

Int. J. Energy Res.

View full text Add to dashboard Cite

A model to simulate the transient behaviour of a heat pump assisted distillation column is presented. The packed bed distillation column is treated as a distributed parameter system with time and space as independent parameters. The column modelling using appropriate basic equations, their application to binary systems, the solution scheme to the model equations and the distillation column simulation algorithm are described. The heat pump simulation algorithm is then coupled with this algorithm and the column transient behaviour with and without heat pump assist is obtained. The results are compared with earlier steady state data in the literature.

show abstract

Section: Previous Workmentioning

confidence: 99%

Transient analysis of heat pump assisted distillation systems. 2 Column and system dynamics

Salim

Sadasivam

Balakrishnan

1991

Int. J. Energy Res.

View full text Add to dashboard Cite

show abstract

“…However, theories based on dynamics are still behind the demand of precise control for improvement of product quality, conservation of material and energy, and protection of the environment. Most of the existing dynamic theories employ the simplifying assumptions of a linear equilibrium relationship and a total condenser or neglect the reflux drum dynamics and the vapor holdup. , Furthermore, the existing dynamic studies concerning packed-bed columns lack the integrity between the hydraulic, mass transfer, and vapor−liquid equilibrium (VLE) models and the dynamic model itself. − …”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling of a Packed-Bed Glycerol−Water Distillation Column

Attarakih

Fara

Sayed

2001

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The study of the dynamics of a packed-bed glycerol-water distillation column is valuable for precise control to improve product quality and to conserve material. A differential dynamic model has been established for the continuous distillation of the glycerol-water system at 10 mmHg absolute. In this model, hydraulic and mass transfer models of structured packing were used to estimate the vapor and liquid holdups and the mass transfer coefficients. The model equations were solved numerically using the finite difference method. It was found that numerical solution of the proposed dynamic model with liquid, vapor, and reflux drum holdups took less computation time than the other models even when either liquid or vapor holdup was neglected. This method of solution reduced the size of system of differential equations from 2n + 1 to n + 1, thus improving the numerical accuracy and saving computation time. The effect of liquid, vapor, and reflux drum holdup on the dynamic behavior of the column was studied. It was found that the liquid and vapor holdups have almost no effect on the dynamics of the packed column. The response of the composition along the height of the column showed nonlinear behavior in response to changes in the reflux drum temperature. The results of this work shed some light on the dynamic behavior of packed-bed distillation columns with highly nonlinear equilibrium relationship due to step changes in the reflux drum temperature.

show abstract

Das dynamische Verhalten von Füllkörperkolonnen beim Betrieb mit nichtidealen Gemischen

Borchardt

Wagner

1971

Chemie Ingenieur Technik

View full text Add to dashboard Cite

Der Faktor 112 erweist sich fur Raschigring-Schutkungen als abhangig vom Luckengrad E bzw. den Anteilen und ~i , den Ringabmessungen und dem Rohr-bzw. Saulendurchmesser. Auf diese Abhangigkeiten, die in [ l ] ausfiihrlich behandelt. worden sind, sol1 jedoch hier nicht naher eingegangen werden, da die letztbeschriebene Modellvorstellung letztlich nicht zu einer genaueren Korrelatlion der Versuchswert,e fiihrte nls die zuvor a.ngegebenen Gln. (10) bis (19).

show abstract

Dynamics of Packed Tower Distillation

Cited by 11 publications

References 4 publications

Transient analysis of heat pump assisted distillation systems. 2 Column and system dynamics

Transient analysis of heat pump assisted distillation systems. 2 Column and system dynamics

Dynamic Modeling of a Packed-Bed Glycerol−Water Distillation Column

Das dynamische Verhalten von Füllkörperkolonnen beim Betrieb mit nichtidealen Gemischen

Contact Info

Product

Resources

About