Investigation Of Carbon Disulfide And Hydrogen Sulfide Degradation Using Electrodeless Iodine-UV Lamp

Odor Pollution is one of the biggest seven environmental nuisances in the world,for this reason it receives more and more attentions from all of the worlds. Odor Gas which has the element Sulfur is paid close attention to because of its low threshold of smell, extensive use and its toxicity. In order to explore the new method to deal with the Odor Gas, which method is more environmental and has higher efficiency. The degrability of CS₂ and H₂S by the Microwave Discharge Electrodeless Lamp-I₂(MDEL-I₂) was studied under normal pressure and temperature.The luminous performance of the MDEL-I₂ (I₂ 2mg, Kr 2 torr) was discussed in the beginning. Then the removal efficiency of CS₂ by MDEL-I₂ under different conditions, such as initial concentrations of CS₂, gas retention time (GRT) and input powers, together with Absolute Removal Amount and Energy Yield, was also studied. In the end, the photolysis products and the photolysis mechanism of CS₂ was analyzed in a preliminary level. The experimental results indicate:The MDEL-I₂ was capable to emit UV radiation of 207nm and it also showed an emission band from 300nm to 400nm, the peak values being 327nm, 342nm, 359nm and 387nm. CS₂ could be photodegraded after absorbing the UV radiation of 207nm and 313nm.Other experimental conditions being the same, the removal efficiency of CS₂ was increased with increasing initial CS₂ concentrations, increasing gas retention time and increasing input power. From the perspective of energy utilization, the Absolute Removal Amount(ARA) and Energy Yield(EY) of CS₂ was increased with increasing initial CS₂ concentrations and increasing input powers, and ARA and EY became steady after the input power reached 567W. With increasing GRT, ARA and EY was reduced, however, when the GRT values became very small, ARA and EY dropped. The removal efficiency of CS₂ was 96.0% with the initial CS₂ concentration of 148.7mg/m3, GRT of 1.19s and input power of 807W, and ARA and EY were 60.5μg/s and 270.1 mg/kWh, respectively.At the same time,this paper makes an on-the-spot investigation at the influence from different conditions to the The removal efficiency of H₂S.We can see from the result of the experiments:when the gas retention time in the Microwave Discharge Electrodeless Lamp-I₂ was 1.19s, the input power was 807W and the initial H₂S concentration was 9.73mg/m3,the removal efficiency of H₂S reached 71.43%.with the increase of the initial H₂S concentration. The removal efficiency of H₂S was reduced with increasing initial H₂S concentrations.But the Absolute Removal Amount(ARA) and Energy Yield(EY) of H₂S was increased with increasing initial H₂S concentrations. As the input power and the initial H₂S concentration being the same, the removal efficiency of H₂S was increased with decreasing gas retention time. But the removal efficiency of H₂S was reduced with increasing gas retention time by the increasing energy waste of system.