Liquid mixing in a bubble column under pressure

Peter M Wilkinson*, H Haringa, FPA Stokman

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    37 Citations (Scopus)


    The liquid axial-dispersion coefficient and gas hold-up are measured in a batch-type bubble column of 0.158 m diameter for the system water-nitrogen at pressures between 0.1 and 1.5 MPa. It is determined that pressure has a marked influence on ps hold-up (in accordance with the results in previous articles), whereas for the same conditions the influence of pressure on the liquid axial-dispersion coefficient is relatively small. Furthermore, it is noted that the influence of pressure on liquid mixing is opposite to what is predicted by theoretical equations for liquid mixing. On the basis of simple mechanistic arguments, these discrepancies are explained. Finally, it is also demonstrated that empirical equations based on atmospheric data can be used (with some adjustment) to estimate the liquid dispersion coefficient at higher pressures.

    Original languageEnglish
    Pages (from-to)1785-1791
    Number of pages7
    JournalChemical Engineering Science
    Issue number10
    Publication statusPublished - May-1993


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