This work presents the results of an experimental study of liquid distribution with counter-current gas flow and without gas flow, carried out in a 0.3m diameter and 1.5m long perspex column packed randomly with 1" plastic Pall rings, 1" plastic Intalox saddles, No.25 Intalox Metal Tower Packing(IMTP) and No.1 metal Nutter rings, in separate experimental sets. The measurements were carried out using concentric annular collectors, in order to measure the distribution of liquid and to distribute the gas uniformly across the bottom of the column. The column was operated with gas flowrates varying over the range of 0 to 1 kg/m<SUP>2</SUP>.sec, and liquid flowrates varying over the range of 40 to 80 1/min. Packing height was increased by adding successive layers of packing, while the ratio of the flow supplied to the bulk and wall regions was varied throughout the experiments. The experimental results were analyzed and compared to a theoretical model developed by Gunn(1978) and extended in 1991. Two regions of packing of different permeabilities may be distinguished, the bulk region and an annular region of packing adjacent to the wall and of higher permeability. The wall region was confined to the order of one particle diameter while the remaining cross-section of the column was accounted as the bulk region. The separation of volumetric mass transfer coefficients in packed columns into mass transfer coefficients and specific surface area, has been attempted using the available data on mass transfer presented by various investigators. One aim of this work is to provide a generalized correlation for mass transfer coefficients and interfacial area that characterized the mass transfer performance of various packings that may be used for designing or scaling up columns or reactors.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:635715 |
| Date | January 1993 |
| Creators | Al-Saffar, H. B. S. |
| Publisher | Swansea University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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