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对合成的12%CuO/15%TiO2/γ-Al2O3催化剂进行了BET和XRD表征,并结合等离子体与催化协同脱除NO的反应装置,考察了单一等离子体、单一催化剂以及等离子体与催化协同脱除NO+CH4+O2的反应结果,研究了上述三种条件下NO和CH4的转化率.BET表征结果表明,15%TiO2/γ-Al2O3的孔径分布在微孔和介孔之间;XRD结果表明,催化剂表面有CuO晶相;反应活性数据表明,单一等离子体存在时,NO和CH4的转化率随着等离子体的输入功率增大而逐渐增加,反应体系引入体积分数为2.5%的O2气促进了NO和CH4的转化;使用单一催化剂时,NO和CH4的转化率随温度升高而分别增大至30%和20%.同时NO转化率随O2气浓度的增加先增加后降低,CH4随O2气浓度的增加转化率逐渐增大;等离子体与催化剂协同作用NO+CH4+O2反应中,NO和CH4的转化率随O2气浓度的增加与只有催化剂存在条件下的变化趋势一致,但是增大了NO的低温转化率,同时CH4的转化率提高到了90%.
The synthesis of 12% CuO / 15% TiO2 / γ-Al2O3 catalyst was characterized by BET and XRD, and combined with the plasma and catalyst synergistic removal of NO reaction device, investigated a single plasma, a single catalyst, and plasma and catalytic synergy The reaction results of NO + CH4 + O2 removal and the conversion of NO and CH4 under the above three conditions were investigated. The results of BET showed that the pore size distribution of 15% TiO2 / γ-Al2O3 was between micropores and mesopores. The results show that the surface of the catalyst has a CuO crystal phase. The reaction data show that the conversion of NO and CH4 increases with the increase of the plasma input power in the presence of a single plasma. The reaction system introduces 2.5% The conversion of NO and CH4 increased with the increase of temperature to 30% and 20%, respectively, when the single catalyst was used.With the increase of O2 concentration, the NO conversion increased first and then decreased, CH4 increases with the increase of O2 concentration, and the synergistic effect of plasma and catalyst in the reaction of NO + CH4 + O2, the conversion of NO and CH4 is consistent with the change of O2 concentration in the presence of only catalyst, But increased NO low-temperature conversion rate, with CH4 conversion increased to 90%.