The objective of this study was to observe the performance of a lab-scale three-stage dual-flow sieve plate column scrubber for hydrogen sulfide (HS) gas removal from a gas stream, in which the HS concentration was similar to that of gasifier syngas. The tap water was used as scrubbing liquid. The gas and liquid were operated at flow rates in the range of 16.59 × 10-27.65 × 10 Nm/s and 20.649 × 10-48.183 × 10 m/s, respectively. The effects of gas and liquid flow rates on the percentage removal of HS were studied at 50-300 ppm inlet concentrations of HS. The increase in liquid flow rate, gas flow rate and inlet HS concentration increased the percentage removal of HS. The maximum of 78.88% removal of HS was observed at 27.65 × 10 Nm/s gas flow rate and 48.183 × 10 m/s liquid flow rate for 300 ppm inlet concentration of HS. A model has also been developed to predict the HS gas removal by using the results from the experiments and adding the parameters that affect the scrubber's performance. The deviations between experimental and predicted HS percentage removal values were observed as less than 16%.
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