SYNTHESIS AND DESULFURIZATION PROCESS WITH CHELATED IRON OF NEW COMPLEXING AGENT

Abstract

Abstract: A new complexing agent SG containing sulfonic group and carboxylic group is synthesized using chlorosulfonic acid and glutaric acid. The ternary complex iron desulfurization system is prepared with SG, EDTA, citric acid and Fe3+. In a continuous desulfurization device, the effect of liquid to feed gas ratio, running time and filler height on the desulfurization efficiency of the ternary system is studied. The effect of air flow rate, regeneration time and temperature on the regeneration for the ternary system is also investigated. The optimum desulfurization conditions are approached as follows: the liquid/feed gas ratio of 0.134, the packing height of 0.4 m, the temperature of 40℃ and pH of 8.0. In this case, the H2S content of the feed gas is reduced from 227.679 g/m3 to 0.011 g/m3, the removal rate is up to 99.99%. The regeneration rate is up to 93.24% at the optimum regeneration conditions: the air flow of 125 L/h, the regeneration time of 30 min, the regeneration temperature of 30 ℃ and pH of 8.0.

Key words: complexing agent, chelated iron, desulfurization, regeneration, H2S

References

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