微波-吸波介质处理炼焦烟气中五环多环芳烃

发布时间：2018-11-20 15:42

【摘要】：五环多环芳烃苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]芘、二苯并[a,h]蒽属于高环多环芳烃,降解难度高、危害大,其中苯并[a]芘危害性最大,具有很强的致毒性和致癌性。通过竖式电炉模拟制备炼焦烟气,采用微波和吸波介质协同处理的方法,以二氯甲烷和玻璃纤维对多环芳烃进行收集,通过超声波萃取、高效液相色谱法检测技术,定性、定量分析炼焦烟气产生的五环多环芳烃,研究了微波-吸波介质处理五环多环芳烃实验时微波温度,以及吸波介质的质量、粒径、种类等实验因素对4种多环芳烃各分量及总量降解效果的影响。实验结果表明,当微波温度400℃、碳化硅吸波介质6 g时,总的降解率为72%,苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]芘、二苯并[a,h]蒽降解率分别为79%、75%、72%和48%,处理效果较好,尤其苯并[a]芘降解率最高。
[Abstract]:Pentacyclic polycyclic aromatic hydrocarbons (PAHs) such as benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [a] pyrene and dibenzo [ah] anthracene belong to high cyclic polycyclic aromatic hydrocarbons (PAHs). It has strong toxicity and carcinogenicity. Coking flue gas was prepared by simulated vertical electric furnace. The PAHs were collected by dichloromethane and glass fiber by microwave and microwave absorbing medium, and analyzed qualitatively by ultrasonic extraction, high performance liquid chromatography (HPLC), high performance liquid chromatography (HPLC). A quantitative analysis of pentacyclic polycyclic aromatic hydrocarbons (PAHs) produced by coking flue gas was carried out. The microwave temperature, the mass and particle size of the absorber medium were studied when the microwave wave absorbing medium was used to treat the PAHs. Effects of species and other experimental factors on the degradation of four PAHs. The experimental results show that the total degradation rate of benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [a] pyrene, dibenzo [aqh] anthracene is 79? 75% and 48%, the results were better, especially the highest degradation rate of benzo [a] pyrene.
【作者单位】：华北理工大学冶金与能源学院河北省现代冶金技术重点实验室;
【基金】：国家自然科学基金项目(51274084) 河北省自然科学基金—钢铁联合基金(E2014209152)
【分类号】：X784

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