化工进展 ›› 2018, Vol. 37 ›› Issue (10): 4109-4118.DOI: 10.16085/j.issn.1000-6613.2017-2407

• 应用技术 • 上一篇    

春风减渣改质塔河减渣制取60#道路沥青效果

姚正天, 沈本贤, 仝玉军, 孙辉   

  1. 化学工程联合国家重点实验室(华东理工大学), 上海 200237
  • 收稿日期:2017-12-12 修回日期:2018-02-28 出版日期:2018-10-05 发布日期:2018-10-05
  • 通讯作者: 沈本贤,教授,博士生导师,研究方向为石油化工。
  • 作者简介:姚正天(1993-),男,硕士研究生。

Preparation of 60# road asphalt through modifying THVR using CFVR

YAO Zhengtian, SHEN Benxian, TONG Yujun, SUN Hui   

  1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2017-12-12 Revised:2018-02-28 Online:2018-10-05 Published:2018-10-05

摘要: 塔河减渣(THVR)直接生产合格道路沥青存在技术瓶颈。本文用调和工艺,以塔河减渣为基质沥青,在荆门油浆、荆门抽出油及春风减渣3种不同种类的调和组分中优选出新疆春风减渣(CFVR)为优质软组分,对THVR改质制备60#道路沥青的效果进行考察,建立基于正庚烷沥青质含量的沥青热老化动力学模型,并对改质前后沥青四组分进行平均分子结构表征。结果表明:与THVR相比,CFVR热老化性能及低温性能较好,但感温性能较差,添加40% CFVR的调和沥青TH-CF-40可满足道路石油沥青60#标准。TH-CF-40老化速率较小,老化反应活化能Ea为102.00kJ/mol,较THVR为高;其饱和分链长为14.44,较THVR短;芳香分、胶质及沥青质芳碳率fA分别为0.29、0.42、0.46,芳环与环烷环之比RA/RN分别为1.24、2.65、2.93,平均侧链长度L分别为6.78、6.09、5.40,均向CFVR趋近,从而使得调和沥青的抗热老化性能及低温延展性有所提高。采用该工艺有助于减少塔河减渣焦化处理量,提高塔河减渣的利用水平,研究结果为拓展春风优质沥青的更高效利用提供理论指导,具有学术意义和应用前景。

关键词: 减压渣油, 调和沥青, 老化动力学, 平均分子结构

Abstract: There are technical bottlenecks in producing qualified road asphalt using Tahe vacuum residue oil (THVR). In present work, THVR, used as a matrix asphalt, was blended with Chunfeng vacuum residue oil (CFVR) as an added component which was selected from 3 different kinds of blending components including FCC slurry oil, furfural extract oil and CFVR. The preparation of 60# road asphalt based on THVR was investigated; thermal aging kinetics model of the resulting asphalt was established based on the contents of insoluble asphalt component in heptane; and the average molecular structures of four components contained in asphalt before and after modification were characterized. The results showed that the thermal aging and low temperature performance of CFVR was better while temperature sensitivity was worse compared with THVR, and blending asphalt TH-CF-40 containing 40% CFVR could meet the standard of 60# Road Petroleum Asphalt. Compared to THVR, TH-CF-40 had the lower aging rate and higher activation energy of aging reaction of 102.00 kJ/mol. Average chain length L of the saturate was 14.44, which was shorter than THVR. The aromatic carbon rates fAof aromatic, resin and asphaltene were 0.29, 0.42 and 0.46, respectively. The ratios of aromatic ring to naphthenic ring RA/RN were 1.24, 2.65 and 2.93; and the average chain lengths L were 6.78, 6.09 and 5.40. The results indicated that the molecular structure was close to CFVR, therefore, leading to the improved anti-aging performance and low-temperature ductility of blending asphalt. Such processing technology can help reduce the throughput of THVR involved in coking process. Furthermore, the research results can improve the utilization level of THVR and provide theoretical guidance for expanding the efficient use of CFVR, as a result, indicating academic significance and application foreground.

Key words: vacuum residue, blending asphalt, aging kinetics, average molecular structure

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