CALCULATING DISTILLATION EFFICIENCIES OF MULTICOMPONENT <i>i</i>-BUTANE/ <i>n</i>-BUTANE COLUMN

Ilme, J.; Klemola, Kimmo; Aittamaa, Juhani; Nyström, Lars

doi:10.1080/00986440108912837

Cited by 3 publications

(1 citation statement)

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“…In this model, the CDC system is simulated as an equilibrium-based RadFrac ® column with the Soave-Redlich-Kwong (SRK) property package using Aspen Plus ® (Version 9.0). Stage efficiencies are adjusted to reproduce the reported data of column duties and stage temperatures [38,39] and product compositions and flow rates (Table 1). Using the predicted stage efficiency of 137.9%, the number of theoretical stages in the conventional column is calculated to be 104.…”

Section: Exergy Analysis Of the Conventional Distillation Columnmentioning

confidence: 99%

A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns

et al. 2022

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Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus® process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.

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Section: Exergy Analysis Of the Conventional Distillation Columnmentioning

confidence: 99%