放电作用下四氯化碳的吸附、脱附及降解特性

The characteristics of adsorption, desorption and degradation of carbon tetrachloride under electric discharge action

考察了填充式反应器中放电对四氯化碳（ＣＣｌ４）的吸附、脱附作用影响．结果表明，放电作用下ＣＣｌ４在反应器中的移动速度加快，穿透时间的从１７ｍｉｎ缩短到６ｍｉｎ，脱附时间约从６０ｍｉｎ缩短至１４ｍｉｎ，反应器对ＣＣｌ４的吸附能力显著下降；脉冲电压峰值越高，ＣＣｌ４吸附一脱附速率越快，降解效率越高．载气成分对ＣＣｌ４的降解有较大影响，在电压为５０ｋＶ的条件下，分别以氮气和氧气作载气，ＣＣｌ４的降解效率可达６９．１％和９７．６％；放电可对吸附剂起脱附再生作用，具有放电脱附速率快、工艺简单等特点，有较好的应用前景．

The influence of electric discharge on the adsorption, desorption and degradation of carbon tetrachloride (CCl4) in a packed discharge reactors was investigated. The results showed that the motion velocity of CCl4 in the reactor was expedited greatly under the discharge action. The penetration time of CCl4. in the reactor was approximately shortened from 17min to 6min and the desorption time from 60 min to 14min. The adsorption capacity of the reactor was reduced markedly. When the applied voltage was higher, the velocity adsorption-desorption was quicker and the degradation efficiency of CCl4, was higher. The carrier gas had great impact on the degradation of CCl4. Under the condition of the pulse voltage peak for 50kV, the degradation efficiency was 69.1% and 97.6% when the carrier gas was nitrogen and oxygen respectively. The discharge can play the role of desorption-regeneration with rapid desorption velocity, simple technique and low energy consumption; so it has better prospect of usage.