太原理工大学学报2018，Vol.49Issue(1)：48-54,7.DOI:10.16355/j.cnki.issn1007-9432tyut.2018.01.008
对苯二甲醇改性煤沥青降低毒性多环芳烃含量
Study on Reducing Toxic PAHs Content in Coal Tar Pitch by 1,4-Benzenedimethanol Modification
摘要
Abstract
Coal tar pitch (CTP) was modified with cross-linking agent 1,4-benzenedimethanol over the catalysis p-toluenesulfonic acid in cyclohexane solvent to reduce toxic PAHs content.The effects of modifier addition amount,catalyst amount,reaction temperature and reaction time on the reduction rate of 16 toxic PAHs monitored by EPA were investigated.The optimum condi tions were as follows:6％ amount of modifier-to-CTP,12％ amount of catalyst-to-CTP,reaction temperature of 50 ℃ and reaction time of 2 h.Under the optimized conditions,the reduction rate of the 16 toxic PAHs in CTP achieved 74.14％.Among them the content of strongly carcinogenic benzo[a]pyrene decreased by 78.38％.The detoxification mechanism was investigated by the re action between model compound pyrene and 1,4-benzenedimethanol and via TG-DTG and FT-IR analyses.It was proved that the cross-linking reaction by electrophilic substitution may take place between PAHs and 1,4 benzenedimethanol.关键词
煤沥青/多环芳烃/改性脱毒/对苯二甲醇/亲电取代交联Key words
coal tar pitch/modification detoxification/polycyclic aromatic hydrocarbons/electrophilic substitution/1,4-benzenedimethanol分类
化学化工引用本文复制引用
冯永辉,徐青柏,张蔺峰,刘刚,牛艳霞,王玉高,申峻,李瑞丰,杜建奎,杨志峰..对苯二甲醇改性煤沥青降低毒性多环芳烃含量[J].太原理工大学学报,2018,49(1):48-54,7.基金项目
交通运输部公路科学研究院道路结构与材料交通行业重点实验室(北京)开放基金(KF201401),山西省科技攻关项目(20150313014-4),山西煤基低碳联合基金(U1610223),中国石油化工股份有限公司(115084) （北京）
