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介质阻挡放电协同催化萘降解

发布时间:2019-01-10 07:23
【摘要】:为了提高萘的降解效果,提出了介质阻挡放电(DBD)和催化协同降解萘的方法,研究了填充介质对放电特性和萘降解效果的影响,深入分析了TiO_2催化剂负载量和气体温度对萘降解的影响机理。研究结果表明:填充TiO_2/硅藻土对DBD放电有一定的抑制作用,导致峰值电流有所下降;填充TiO_2/硅藻土较未填充时,萘的降解率及CO_x选择率均有明显提升,特别是CO_x选择率提高将近30%;随着硅藻土上TiO_2负载量的增加,CO_x选择率从47.5%增加至76.5%,CO2的提高幅度达到24.2%,而CO选择率的提高幅度仅4.8%;模拟气体温度由25℃升高到100℃,虽然萘的降解率仅从83.8%增加至91.8%,但CO_x选择率则从45.3%增加至87.5%,增加了近1倍。TiO_2对萘的降解有明显的促进作用,这为难降解有机气体的无害化处理提供了新的依据。
[Abstract]:In order to improve the degradation effect of naphthalene, the method of dielectric barrier discharge (DBD) and catalytic co-degradation of naphthalene was put forward, and the effect of filling medium on discharge characteristics and naphthalene degradation efficiency was studied. The influence mechanism of loading amount of TiO_2 catalyst and gas temperature on naphthalene degradation was analyzed. The results show that the filling of TiO_2/ diatomite can inhibit the discharge of DBD to some extent, resulting in the decrease of peak current. When filled with TiO_2/ diatomite, the degradation rate and CO_x selectivity of naphthalene increased significantly, especially the CO_x selectivity increased by nearly 30%. With the increase of TiO_2 loading on diatomite, the selectivity of CO_x increased from 47.5% to 76.5% and the range of CO _ 2 increased to 24.2%, while the increase of CO selectivity was only 4.8%. When the simulated gas temperature was raised from 25 鈩,

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