A process is proposed for the removal of H{sub}2S from sour produced wastewater at lower temperatures (<25℃) using an activated carbon as a catalyst and oxygen in air as an oxidizing agent. Hydrodarco-activated carbon catalyst was successfullyused in this process in a continuous-flow stirred-tank reactor (CFSTR) in an aqueous solution with a pH of 3-10, and temperature and residence time of the feed in the reactor ranging from 8 to 24℃ and 5.2 to 18.6 mm, respectively. This catalyst hashigher activity than that of Calgon catalyst in this process. The H{sub}2S conversion was increased with temperature, the conversion approaching 100 at 24℃ after 90 mm of operation at a pH of 4.5 and a residence time of 11.4 mm. The Hydrodarcoactivatedcarbon was capable of sorbing 0.66 g of sulfur/g of carbon before its activity decreased significantly giving conversions below 90. In a CFSTR, for the sour water with a pH value of 4.5, the rate of H{sub}2S oxidation in the temperature range 8-24℃ was-r{sub}H{sub}2S = (5.072 x 10{sup}10 (μmol/L){sup}0.76 (1/min)) exp(-21.3 kJ/mol/RT)H{sub}2S {sup}0.24, μmol/(L mm).
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