Study On Fenton Reagent Treating Xylene Waste Gas With Spraying Oxidation

Xylene is a commonly used solvent, often used as a high octane gasoline component, additive and diluent of different types of paint, solvent-based adhesive and waterproof material. Xylene liquid is of highly volatile, and volatile gas turns out to be moderate toxicity, which stimulates eye and upper respiratory tract. With high concentration, the gas is anesthetic action on the central nervous system, so it is necessary for us to treat the xylene gas. At present, there are many kinds of methods of treating xylene organic waste gas, but most of them remain disadvantages with high investment cost, easy to produce secondary pollution, long operation time, ineffective treatment, therefore studying pollution prevention and control for xylene waste gas is an important task of the human environment protection.Fenton reagent is a kind of advanced oxidation technology developed rapidly in recent years. This method has the advantages of simple operation, rapid, non-toxic, high removal rate of pollutants, non-secondary pollution. The difficult degradation matter can be deeply oxidized by using the strong oxidation of Fenton reagent reaction system, who has a broad prospect.Fenton reagent (namely H2O2/Fe2+) can product·OH by the catalyst Fe2+catalyzing H2O2that makes H2O2to be of strong oxidation ability. The reaction system is suitable for oxidation of refractory organic waste gas, therefore Fenton reagent technology is one of development directions of organic waste gas treatment technology in the future.In this experiment, Fenton reagent was used to treat the self-made xylene organic waste gas, reviewed the influence of the influence factors of H2O2dosage, FeSO4dosage, pH value and liquid-to-gas volume ratio through calculating xylene removal rate during the reaction. First, confirmed the preliminary operating condition through the orthogonal experiment, the orthogonal experiment result and the range analysis indicated that the important order of the influence factors of influencing the xylene removal rate was pH value>H2O2dosage>FeSO4dosage> liquid-to-gas volume ratio, and the H2O2dosage was the most impact on xylene gas removal effect. The best combination for the orthogonal experiment was:the pH value3, the H2O2dosage15ml, FeSO4dosage1500mg, the liquid-to-gas volume ratio3L/m3.Then, on this basis of it, determined the optimum processing conditions by doing the single factors experiment, and finally worked out that the suitable treatment condition with Fenton reagent was:under the room temperature, liquid-to-gas volume ratio3L/m3,30%H2O2dosage15ml, FeSO4dosage1500mg, pH value3, the removal rate of xylene can reach above75.3%.In conclusion,it was feasible to degrade the xylene gas stream with Fenton reagent.