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A sour water waste stream generated in a petroleum refinery contains 2500ppmw of H2S. This pollutant is to be reduced to 1.5 ppmw in a

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A sour water waste stream generated in a petroleum refinery contains 2500ppmw of H2S. This pollutant is to be reduced to 1.5 ppmw in a stripper operating at 1.4bara (at top of stripper) and utilising a reboiler (steam heated). The amount of steam leaving the top tray of the column is 90kg steam per m3 feed. Calculate the number of theoretical trays required for a sour water feed rate of 2.3m3/h

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