Mass transfer efficiency of a tall and low plate free area liquid pulsed sieve-plate extraction column

Abstract

Mass transfer performance is studied in a tall, thin, and low plate free area liquid pulsed sieve-plate extraction column. The 5.0 cm internal diameter column consists of eighty sieve plates with percent free area of only 13.5. The effects of pulsation intensity (product of amplitude and frequency) and dispersed phase velocity are studied on the extraction efficiency of the column for the acetic acid-kerosene-water system. A mass transfer correlation for the measurement of overall mass transfer coefficient is developed that best-fits the experimental data obtained in the present study. Mathematical analysis of the column is carried out that shows the insignificance of axial diffusivities in the column.

Hydrodynamics of pulsed sieve-plate extraction columns

“…ekstraktorima tipa mešač-odvajač. Ove ekstrakcione kolone se intenzivno koriste u ekstrakciji radioaktivnih kontaminanata iz rastvora, pošto one nemaju pokretnih unutrašnjih delova i relativno su malih dimenzija [7,8]. PEPP kolone pokazuju jasnu prednost u poređenju sa drugim mehaničkim kontaktorima, naročito u procesima u kojima su prisutni korozija ili radioaktivni rastvori, pošto je pulzaciona jedinica izmeštena izvan ekstrakcione kolone.…”

“…Šematski prikaz poluindustrijske pulzacione ekstrakcione kolone sa perforiranim podovima; a) osnovna ekstrakciona kolona sa elementima, b) dizajn pojedinačnog poda (Preuzeto iz Khawaja i sar. [8]) Figure 1. Scheme of a pilot scale pulsed sieve-plate extraction colum; a) basic extraction column with the main elements, b) design of the individal plate (Reprinted with permission from Khawaja et al [8])…”

“…[8]) Figure 1. Scheme of a pilot scale pulsed sieve-plate extraction colum; a) basic extraction column with the main elements, b) design of the individal plate (Reprinted with permission from Khawaja et al [8])…”