Liquid-phase resistance to mass transfer on distillation trays

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie00048a019· OSTI ID:183068

Chen, G X; Chuang, K T ^[1]

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1. Univ. of Alberta, Edmonton (Canada). Dept. of Chemical Engineering

The liquid-phase resistance to mass transfer was determined for the distillation of six binary mixtures. It was found that the liquid-phase resistance to mass transfer is significant, ranging from 20 to 55% of the total mass-transfer resistance. The results also indicated that the traditional assumption of {theta}{sub G} = {theta}{sub L} is not valid for distillation systems. If this assumption is applied, the fraction of liquid-phase resistance to mass transfer will be significantly underestimated. Tray efficiency models developed from data obtained from absorption and stripping systems (e.g., the AIChE method) were suggested to greatly overpredict the number of liquid-phase mass-transfer units for distillation systems. Thus, careful examination of the use of various efficiency models for tray design is required.

• Sponsoring Organization: USDOE
• OSTI ID: 183068
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 9 Vol. 34; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BINARY MIXTURES
DESIGN
DISTILLATION EQUIPMENT
KINETIC EQUATIONS
MASS TRANSFER
MATHEMATICAL MODELS
PHASE STUDIES
TWO-PHASE FLOW