Liquid holdup by gravimetric recirculation continuous measurement method. Application to trickle bed reactors under pressure at laboratory scale

Juan García-Serna, Gianluca Gallina, Pierdomenico Biasi, Tapio Salmi

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)


Liquid holdup is a crucial parameter when operating catalytic trickle bed reactors related to wetting efficiency and residence time. Most of the classical methods are expensive, time-consuming, or not valid for high pressures. Liquid holdup by gravimetric recirculation (LHGR) measurement method determines the average total liquid holdup using a closed loop with total recirculation of liquid. The recirculating liquid is contained in a vessel that is weighed instantaneously with a known amount of liquid. The difference between the initial amount of liquid and the instantaneous weight gives the liquid holdup. Main benefits are the following: first, the measurement takes only the time of stabilization that at laboratory scale is 2–5 min; second, the system is ready for the next measurement without any modification (the bed is not disturbed nor modified); third, it works for high pressures; finally, it gives values comparable to those from classical techniques like RTD or conductivity methods.

Original languageUndefined/Unknown
Pages (from-to)13294–13300
JournalIndustrial & Engineering Chemistry Research
Issue number45
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed


  • Chemical Engineering

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