神华煤直接液化残渣萃取组分改性石油沥青

发布时间：2018-01-07 01:15

  本文关键词：神华煤直接液化残渣萃取组分改性石油沥青　出处：《化工进展》2017年09期 　论文类型：期刊论文

  更多相关文章： 改性剂 石油沥青 傅里叶变换红外光谱 热重分析 荧光显微镜

【摘要】：以神华煤直接液化残渣索氏溶剂梯级萃取分别得到的重油(HS)、沥青烯(AS)和前沥青烯(PA)作为改性剂,对石油沥青进行改性,探究改性剂的掺混量对石油沥青性能的影响及其改性机制。研究表明:当HS作为改性剂时,最佳掺混量为1%;当AS作为改性剂时,最佳掺混量为4%;PA作为改性剂时得到的改性沥青,针入度和延度不能同时符合美国ASTM D5710—95标准40~55针入度的指标要求;HS和AS改性沥青与石油沥青相比在2924cm~( 1)及2847cm~( 1)处的—CH2—的伸缩振动吸收峰强度变弱,在改性过程中可能发生了烷基侧链脱氢反应;改性沥青与石油沥青的热失重相比,其最终失重温度都有所提高,当AS作为改性剂、加入量为4%时改性沥青最终失重温度提高最大为11℃;随着改性剂分子量的增大,其荧光显微镜图片中的荧光物质会越来越多,颗粒逐渐增大。
[Abstract]:The bitumen was modified with heavy oil (HSN), asphaltene (ASA) and pre-asphaltene (PAA), which were obtained by step extraction with Soxhlet solvent from direct liquefaction residuals of Shenhua coal as modifiers. The effects of modifier on the performance of petroleum asphalt and its modification mechanism were investigated. The results showed that the optimum blending amount was 1 when HS was used as modifier; When as is used as modifier, the optimum blending amount is 4. The penetration and ductility of modified asphalt obtained by PA as modifier can not meet the requirements of 4055 penetration of ASTM D5710-95 standard. Compared with petroleum asphalt, HS and as modified asphalt have weaker absorption peak intensity of -CH2- at 2924 cm ~ (-1) and 2847 cm ~ (-1). The alkyl side chain dehydrogenation may take place during the modification process. Compared with the thermal weight loss of petroleum asphalt, the final weight loss temperature of modified asphalt is increased. When as is used as modifier, the final weight loss temperature of modified asphalt is increased to 11 鈩，

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