Experimental investigations into the adsorption enhancement in packed beds using Z-Annular flow configuration

S. K. Yeboah, J. Darkwa

Research output: Journal PublicationArticlepeer-review

8 Citations (Scopus)


Annular packed bed structures have the potential to overcome limitations of conventional fully packed bed types by offering radial distribution of airflow within them to enhance fluid-solid contact during adsorption and also to minimize pressure drops. In this paper, Z-annular flow configuration is experimentally investigated to evaluate its potential to enhance adsorption. Three typical diametrical ratios (Do/Di) corresponding to 2, 2.35 and 3.08, inferred from literature were used to investigate the adsorption performance of the Z-annular flow arrangement and compared with adsorption performance of a conventionally configured fully packed bed system of similar dimensions. The results showed the Z-annular flow configurations did perform better by achieving bed temperature reductions averaging between 4.22 and 5.47 °C than conventional configuration types. Pressure drops were however observed to be relatively higher in the Z-annular flow configuration bed types than the conventional fully packed bed type due to the endplate in the Z-annular flow configuration impeding the airflow and subsequently causing flow reversal. Overall, the Z-annular flow configuration was found to have the potential to enhance the adsorption capacity of packed beds however further investigation on optimum parameters for this enhancement may be required.

Original languageEnglish
Pages (from-to)121-134
Number of pages14
JournalInternational Journal of Thermal Sciences
Publication statusPublished - Feb 2019


  • Heat and mass transfer
  • Packed beds
  • Physical adsorption
  • Pressure drop

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering (all)


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