Removal of H₂S pollutant from gasifier syngas by a multistage dual-flow sieve plate column wet scrubber

Abstract

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%.

Experimental Study of the Influence of Gas Flow Rate on Hydrodynamic Characteristics of Sieve Trays and Their Effect on CO2 Absorption

“…Kurella, Bhukya et al (2017) [8] studied the effect of the gas velocity on the average height of the clear liquid that is on the tray; their experimental study was conducted in a dual-flow sieve plate scrubber. The authors found that at constant liquid flow rates, the average clear liquid height increased as the gas loading factor (Fs) was increased.…”

“…Kurella, Bhukya et al (2017) [8] examined the effects of gas and liquid flow rates on the percent removal of H 2 S at H 2 S input concentrations of 50-300 ppm. Their experiments were performed in a lab-scale three-stage dual-flow sieve plate column scrubber.…”

Removal of Cement Dust Particulates via Fully Submerged Self‐Primed Venturi Scrubber

“…[ 18 ] The multi‐stage dual flow sieve plate wet scrubber column was also utilized for H 2 S scrubbing from gasifier syngas using tap water as the scrubbing liquid with 78.88% removal efficiency. [ 19 ] A literature review also revealed that limited experimental work has been done on PM removal using venturi scrubber systems, and there is no literature available for cement dust removal using venturi scrubbers. Therefore, the present work focuses mainly on the performance efficiency of venturi scrubbers for dust particulate removal.…”

Biofiltration performance and kinetic study of hydrogen sulfide removal from a real source

“…Negative effects on ecological systems and human health by H 2 S emission has driven development of various physical and chemical technologies for treatment at its source. These are including hybrid solvents (ionic liquids) for selective sorptive separation of H 2 S from a gas stream [8,9], scrubbing [10], adsorption [11,12], thermocatalytic processes [13], and electrochemical technologies [14]. High operating and process costs, generation of hazardous byproducts, and high pressure/temperature requirements are the main bottlenecks for developing these technologies [15].…”