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基于二英稳定发生系统,研究不同温度下(160、180、200℃)两种活性炭(煤基活性炭及椰基活性炭)与V2O5-WO3/Ti O2催化剂的物理混合物对高浓度气相二英(本文所有质量浓度均为毒性当量质量浓度,其毒性当量质量浓度为20.46 ng·m-3)的吸附降解作用.试验结果表明,混合物可以较大幅度的提高二英的脱除效率及降解效率,其中椰基混合物表现出较好的吸附性能,而煤基活性炭表现出较好的降解性能.当反应温度为200℃,使用煤基混合替代催化剂,二英降解率由56.4%上升至82.0%.将含有毒性当量质量浓度为1.539 ng·g-1的二英混合物置于200℃下,并采用混合气体(VN2∶VO2=9∶1)进行吹扫,发现经过10 h后,混合物中二英的毒性当量质量浓度仅为0.296ng·g-1,最终有76.5%的二英得到了降解,为混合物的循环利用提供可能性.
Based on the two-temperature system, the effect of physical mixture of two kinds of activated carbon (coal-based activated carbon and coconut-based activated carbon) and V2O5-WO3 / Ti O2 catalyst at different temperatures All the mass concentrations were toxic equivalent mass concentration, the toxic equivalent mass concentration of 20.46 ng · m-3) adsorption degradation test results show that the mixture can greatly improve the dioxin removal efficiency and degradation efficiency, in which Coconut mixture showed good adsorption performance, while coal-based activated carbon showed good degradation performance.When the reaction temperature was 200 ℃, using coal-based mixed instead of the catalyst, the dioxin degradation rate increased from 56.4% to 82.0% A binary mixture containing a toxic equivalent weight of 1.539 ng · g -1 was placed at 200 ° C and purged with a mixed gas (VN 2: VO 2 = 9: 1). It was found that after 10 h, the mixture of dioxin Toxicity equivalent mass concentration of only 0.296ng · g-1, eventually 76.5% Dioxin degrade, providing the possibility of recycling the mixture.