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考察了在干燥气氛下不同氧化物催化剂对非热等离子体催化降解甲苯的影响。从甲苯降解率、碳平衡、CO2选择性和O3去除4个方面,对比了氧化物催化剂的介电性能、表面供氧能力和比表面积与多孔结构对反应产生影响的强弱。结果表明,催化剂的介电性能有利于甲苯降解率、碳平衡和O3产量的提高,但对CO2选择性和O3去除的影响极小;一定能量密度下,催化剂比表面积与多孔结构对CO2选择性和O3去除所产生的影响要强于介电性能;催化剂表面供氧能力可明显促进反应的进行,其对反应所产生的影响要强于比表面积与多孔结构。
The effect of different oxide catalysts on the non-thermal plasma catalytic degradation of toluene under dry atmosphere was investigated. From the aspects of toluene degradation rate, carbon balance, CO2 selectivity and O3 removal, the dielectric properties, surface oxygen supply capacity and specific surface area of oxide catalysts were compared with those of porous structures. The results show that the dielectric properties of the catalysts are favorable for the degradation of toluene, the carbon balance and the increase of O3 production, but have little effect on the selectivity of CO2 and the removal of O3. Under a certain energy density, the specific surface area of catalyst and the selectivity of CO2 to porous structure And O3 removal is stronger than the dielectric properties. The oxygen supply on the surface of the catalyst can significantly promote the reaction, which has a stronger effect on the reaction than the specific surface area and the porous structure.