Destillier- und Rektifiziertechnik

Kirschbaum, Emil

doi:10.1007/978-3-662-11458-2

Cited by 75 publications

(16 citation statements)

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“…An important parameter of the process is the liquid holdup in the column, which determines the residence times of the liquid and vapor phases at a contact stage. The liquid holdup is particularly important in analyzing the mass transfer accompanied by a chemical reaction [3,4].Let us consider the effect of the liquid holdup on the variation of the composition along the column height in distillation of binary and ternary ideal mixtures at infinite reflux ratio. Let us assume that the process is steady-state, the relative fugacity coefficients are constant, the liquid and vapor flow rates remain unchanged along the column height, the efficiency of each stage is unity, and the holdup of the vapor phase in the column is ignored.…”

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“…The distribution of components depends significantly on the physicochemical nature of the mixture being separated, the hydrodynamic conditions of contact between the phases, and the heat-and mass-transfer rates [1][2][3][4]. An important parameter of the process is the liquid holdup in the column, which determines the residence times of the liquid and vapor phases at a contact stage.…”

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Profiles of the concentrations of components along the column height at different liquid holdup distributions in distillation of binary and ternary mixtures

Lotkhov

Дильман

Lipatova

et al. 2005

Theor Found Chem Eng

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Analysis of the distribution of components along the distillation column height is necessary in studying the column operation over a wide range of flow rates. The distribution of components depends significantly on the physicochemical nature of the mixture being separated, the hydrodynamic conditions of contact between the phases, and the heat-and mass-transfer rates [1][2][3][4]. An important parameter of the process is the liquid holdup in the column, which determines the residence times of the liquid and vapor phases at a contact stage. The liquid holdup is particularly important in analyzing the mass transfer accompanied by a chemical reaction [3,4].Let us consider the effect of the liquid holdup on the variation of the composition along the column height in distillation of binary and ternary ideal mixtures at infinite reflux ratio. Let us assume that the process is steady-state, the relative fugacity coefficients are constant, the liquid and vapor flow rates remain unchanged along the column height, the efficiency of each stage is unity, and the holdup of the vapor phase in the column is ignored. Figure 1 presents the flowchart of a distillation column. The vapor that leaves the upper part of the column and has concentration y n is completely condensed in the condenser and returns to the column at concentration x d ; consequently, BINARY SYSTEM(1)The material balance equation for the i th stage has the formwhence, with allowance for relation (1), it follows thatRelations similar to formulas (3) and (4) can also be written for other separation stages. The vapor leavingAbstract -The distribution of components along the distillation column height in distillation of binary and ternary mixtures is studied at different profiles of liquid holdup in the system. It is shown that physical modeling of continuous and batch distillation at infinite reflux ratio without taking into account the liquid holdup distribution may be inadequate to the real process. Equations for the curvilinear equilibrium line are proposed, which relate the number of transfer units, the number of theoretical separation stages, and the component concentration.

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Profiles of the concentrations of components along the column height at different liquid holdup distributions in distillation of binary and ternary mixtures

Lotkhov

Дильман

Lipatova

et al. 2005

Theor Found Chem Eng

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“…The distribution of components depends significantly on the physicochemical nature of the mixture being separated, the hydrodynamic conditions of contact between the phases, and the heat-and mass-transfer rates [1][2][3][4]. The distribution of components depends significantly on the physicochemical nature of the mixture being separated, the hydrodynamic conditions of contact between the phases, and the heat-and mass-transfer rates [1][2][3][4].…”

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confidence: 99%

Profiles of the concentrations of components along the column height at different liquid holdup distributions in distillation of binary and ternary mixtures

Lotkhov

Дильман²,

Lipatova³

et al. 2005

Theor Found Chem Eng

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The distribution of components along the distillation column height in distillation of binary and ternary mixtures is studied at different profiles of liquid holdup in the system. It is shown that physical modeling of continuous and batch distillation at infinite reflux ratio without taking into account the liquid holdup distribution may be inadequate to the real process. Equations for the curvilinear equilibrium line are proposed, which relate the number of transfer units, the number of theoretical separation stages, and the component concentration.

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“…Die Korrelation von Fair 111 ist fur kleine Bohrungsdurchmesser d, 5 6,4.10-3 m gultig. Stichlmair [2]…”

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Bestimmung der maximalen Gasbelastung in Bodenkolonnen für kleine Flüssigkeitsbelastungen

Kozioł

1990

Chemie Ingenieur Technik

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Obere Belastungsgrenze bei verschiedenen BodengeometrienAus der Literatur [l-51 ist bekannt, daB nicht nur der Anteil der relativen freien Lochflache q, sondern auch der Kolonnendurchmesser d,, der Bodenabstand H und die BohrungsgroBe dh die maximale Belastbarkeit von Sieb-und Ventilboden beeinflussen. Es ist somit sinnvoll, eine dimensionslose Kennzahl KO zu bilden, die nur Geometrieparameter eines Bodens beinhaltet. Beim Einsatz von Glockenboden ist in GI. (11) Bedeutung der GroBe dh bei der Definition der dimensions-1) Eine Zusammenstellung der Formelzeichen befindet sich am SchluR des Beitrags.

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Destillier- und Rektifiziertechnik

Cited by 75 publications

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Profiles of the concentrations of components along the column height at different liquid holdup distributions in distillation of binary and ternary mixtures

Profiles of the concentrations of components along the column height at different liquid holdup distributions in distillation of binary and ternary mixtures

Profiles of the concentrations of components along the column height at different liquid holdup distributions in distillation of binary and ternary mixtures

Bestimmung der maximalen Gasbelastung in Bodenkolonnen für kleine Flüssigkeitsbelastungen

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