HCFC-22热分解动力学的研究

本文讨论了HCFC-22热分解特性,并研究了HCFC-22初始浓度和反应温度对HCFC-22分解率的影响。实验结果表明,HCFC-22初浓度越低,反应温度越高,HCFC-22分解率越高。根据Arrhenius方程计算,500～800℃范围内,HCFC-22在氮气和空气气氛下热分解反应的活化能(E_a)分别为248.21、288.89 kJ·mol^(-1),其相应的指前因子(A)为3.26×10^(13)、3.26×10^(16)s^(-1)。

六氟乙烷的热分解特性

采用管式炉研究了950～1100℃温度区间C2F6的分解特性,并研究了C2F6的初始浓度、反应温度、停留时间对C2F6分解率的影响.实验结果表明,C2F6初始浓度越低、温度越高、反应时间越长,C2F6分解率就越高.同时,热解反应的反应级数应该介于0和1之间.在温度为1100℃,C2F6初始浓度为223.21μmol/L,停留时间为2s时,C2F6分解率高达90%.根据Arrhenius方程计算,在950～1100℃,C2F6热分解反应的活化能(Ea)为313.2kJ/mol,频率因子(A)为8.8×1011s-1.

Simultaneous Oxidization of NO_x and SO_2 by a New Non-thermal Plasma Reactor Enhanced by Catalyst and Additive

The non-thermal plasma as one of the most promising technologies for removing NOx and SO2 has attrm^ted much attention. In this study, a new plasma reactor combined with catalyst and additive was developed to effectively oxidize and remove NOx and SO2 in the flue gas. The experimental results showed that TiO2 could improve the oxidation efficiency of SO2 in the case of applying plasma while having a negative effect on the oxidation process of NO and NOx. With the addition of NH3, the oxidation rates of NOx, NO and SO2 were slightly increased. However, the effect of adding NH3 on NOx oxidation was negative when the temperature was above 200℃.