脉冲电晕放电降解CFC-113和CCl4

催化降解ＣＦＣ－１３３和ＣＣｌ４难度较大。采用脉冲电晕与吸附相结合，在电晕反应器中加入吸附剂（如γ－Ａｌ２Ｏ３），显著提高了降解效果。实验结果揭示吸附剂的比表面与孔径大小显著影响ＣＦＣ－１１３和ＣＣｌ４的降解反应活性以及副产物臭氧浓度。本研究开发出一种Ａｌ２Ｏ３－Ⅱ吸附剂，它的比表面为９４．４ｍ＾２／ｇ，孔径〈０．５μｍ，当它与高压脉冲电晕放电相结合时，一方面提高了降解率，另一方面抑制了臭氧生成，

Destruction of CFC-113 and CCl4 by Pulsed Corona Discharges

Addition of adsorbents(Al2O3) into the corona reactor can enhance decomposition efficiency compared with the case of no packingThe experimental results revealed that surface area and porosity of adsorbent will remarkably affect the destruction efficiency of CFC113 and CCl4 as well as ozone generationIn this study,it was developed that an adsorbent(Al2O3)which has primarily smaller pores of diameter<005m and relative large surface area of 944m2/g demonstrated higher plasma destruction reactivity and lowering ozone generation;while the other adsorbent(Al2O3)which has lower surface area(205m2/g)and higher macroporous(pores of diameter 0101m)performed slightly lower destruction efficiency and simultaneously higher ozone generation activity compared with Al2O3These information are valuable for the new technique of pulsed corona discharges combined with appropriate adsorbent for the destruction of toxic volatile organic compounds(VOCs)