Effective removal of volatile petroleum hydrocarbons by solubilization absorption combined with electrocatalytic oxidation
In order to effectively address the issue of volatile petroleum hydrocarbon emissions,n-butane,a typical volatile petroleum hydrocarbon was targeted as the pollutant,and Tween 80 was used as the solubilizing absorbent for the absorption of n-butane from simulated waste gas under controlled laboratory conditions.Sn-Sb loaded modified tourmaline(Sn-Sb tourmaline)was selected as the granular electrode to construct a three-dimensional electrocatalytic oxidation system for the removal of n-butane from the absorbent solution.The results indicated that Tween 80 could achieve long-lasting and stable absorption of n-butane,and had a certain degree of electrocatalytic stability,making it suitable as a solubilizing absorbent for volatile petroleum hydrocarbons.The three-dimensional electrocatalytic oxidation system could effectively remove the n-butane,with·OH playing a major role in the degradation process.Current density and electrolyte concentration had a certain impact on the degradation efficiency.In practical engineering applications,to ensure the mass transfer efficiency between gas and liquid and the overall efficiency,the current density was recommended at 10 mA/cm2 and an electrolyte concentration of Na2SO4 at 0.01 mol/L.Compared with other commonly used materials,Sn-Sb tourmaline particles had advantages of high degradation efficiency,fast degradation rate,low energy consumption and strong structural stability,and could be used as particulate electrode material.The combination of solubilization absorption and electrocatalytic oxidation technology could offer a route for the efficient and low-carbon treatment of volatile petroleum hydrocarbons in petrochemical enterprises.
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