微波和紫外改性煤沥青脱除毒性多环芳烃研究  

Study on microwave and ultraviolet modified coal tar pitch to remove toxic polycyclic aromatic hydrocarbons

作　　者：王伟 冯永辉 申峻[1] 王玉高[1] 刘刚[1] 李瑞丰[1] 徐青柏[2] WANG Wei;FENG Yonghui;SHEN Jun;WANG Yugao;LIU Gang;LI Ruifeng;XU Qingbai(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Fushun Research Institute of Petroleum and Petrochemicals,China Petroleum&Chemical Corporation,Fushun 113001,China)

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]中石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《煤炭科学技术》2021年第4期237-243,共7页Coal Science and Technology

基　　金：山西煤基低碳联合基金重点资助项目(U1610223);国家自然科学基金青年基金资助项目(21706172)。

摘　　要：煤沥青(CTP)中因含有大量对生态环境有害的多环芳烃(PAHs)而限制了其应用和发展。为降低或抑制CTP中毒性PAHs的释放,采用了微波和紫外辅助10-十一烯醛,以KHSO4为催化剂改性CTP的方法,考察了美国环境保护局优先监控的16种PAHs的脱除率和改性前后苯并[a]芘当量毒性的变化,对比分析了不同时间微波、紫外和微波紫外对CTP中毒性PAHs的脱除率。结果表明,微波和紫外共同改性脱除PAHs效果最优,在改性CTP中16种PAHs的最大脱除率在60~120 min内可达91.59%,总含量可小于7.41 mg/g,与无辅助反应相比节省2~3 h。改性前后CTP的傅里叶变换红外光谱(FTIR)、拉曼光谱(Raman)、固体核磁共振碳谱(~(13)C CP/MAS NMR)和X射线衍射(XRD)等特征分析表明,在强化改性试验过程中,10-十一烯醛与多环芳烃发生了亲电取代反应,占据了毒性位点或改变了毒性PAHs的结构,从而降低16种优先监控的毒性PAHs的含量。Coal tar pitch(CTP)contains a large number of polycyclic aromatic hydrocarbons(PAHs)that are harmful to the ecological environment,which limits its application and development.Therefore,reducing or inhibiting the release of toxic PAHs in CTP has become an urgent problem to be solved.Microwave and UV-assisted 10-undecenal were used to modify CTP with potassium bisulfate as a catalyst.The variation of benzo[a]pyrene equivalents of 16 U.S.Environment Protection Agency(EPA)priority PAHs before and after modifica⁃tion were also evaluated.In the modified CTP,the maximum removal rateof 16 priority PAHs reached 91.59%within 60~90 minutes and the total content was reduced to below 7.41 mg/g,which saved 2.5 to 3 hours compared with no auxiliary reaction.The characteristic anal⁃ysis of infrared,Raman,X-ray diffraction(XRD)and solid-state nuclear magnetic resonance(13C CP/MAS NMR)of CTP before and after modification showed that in the process of intensive modification experiments,10-undecenal and polycyclic aromatic hydrocarbons undergo an electrophilic substitution reaction,occupying toxic sites or changing the structure of toxic PAHs,thereby reducing the quality of 16 priority monitoring toxic PAHs concentration.

关 键 词：煤沥青 微波和紫外改性 多环芳烃 

分 类 号：TQ522.65[化学工程—煤化学工程]