降低石油沥青多环芳烃含量的研究

Study on the Reduction of Polycyclic Aromatic Hydrocarbons in Petroleum Asphalt

采用聚合物改性法,对普通90号道路沥青进行降低多环芳烃(PAHs)含量研究。根据脱毒机理及相似相容原理,选择与沥青中多环芳烃可互溶,同时含有活性基团的聚醇类、聚甲醛类或苯醛类聚合物作为改性剂,有机酸或无机酸为催化剂,设计不同的配比和反应条件进行试验。评选出较优的试验方案为:改性剂聚醇类添加量6%,催化剂无机酸添加量2%,反应温度180℃,反应时间2h。沥青PAHs总含量降低率达53.6%。

The polymer modification method was used to reduce the content of polycyclic aromatic hydro-carbons(PAHs)in the asphalt of ordinary No.90 road.According to the detoxification mechanism and the principle of similarity compatibility,polyols,polyoxymethylene or benzaldehyde polymers that are miscible with polycyclic aromatic hydrocarbons in asphalt and contain active groups are selected as modifiers,and organic acids or inorganic acids are used as catalysts,and different ratios and reaction conditions are designed for testing.The best test scheme was selected as follows:6%of the modifier polyols,2%of the catalyst inorganic acids,180 C,and 2 h of reaction time.The total PAHs content of 15 asphalt items decreased by 53.6%.