Comparison of the mass transfer efficiency of random and structured packings under distillation of positive, neutral, and negative system in the i.d. 0.3 m column

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F25%3A43933545" target="_blank" >RIV/60461373:22340/25:43933545 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0017931026001523?pes=vor&utm_source=scopus&getft_integrator=scopus" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0017931026001523?pes=vor&utm_source=scopus&getft_integrator=scopus</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2026.128476" target="_blank" >10.1016/j.ijheatmasstransfer.2026.128476</a>

Result language
angličtina
Original language name
Comparison of the mass transfer efficiency of random and structured packings under distillation of positive, neutral, and negative system in the i.d. 0.3 m column
Original language description
Distillation experiments were carried out under total reflux in a 0.3 m i.d. column equipped with a structured packing (Sulzer MellapakPlus™ 252.Y) and a lattice-type random packing (Sulzer NeXRing™ 0.7). Binary C<inf>6</inf>–C<inf>7</inf> hydrocarbon mixtures were investigated, including cyclohexane/n-heptane (negative system) and n-hexane/cyclohexane (positive system). Given the close similarity of the gas-phase properties of the systems, comparable separation efficiencies would be expected. Nevertheless, the height equivalent to a theoretical plate differed by approximately 15–20% under identical F <inf>G</inf> factors, with the highest HETP observed for the negative system and the lowest for the positive system. The same trend was found for both structured and random packings, indicating that the effect is not restricted to a specific packing type. Compared with earlier studies employing wetted-wall columns and first-generation random packings, the magnitude of the effect is reduced for modern industrial packings. Existing models fail to provide a satisfactory quantitative description of the observed behavior. © © 2026. Published by Elsevier Ltd.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20300 - Mechanical engineering

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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