【作者】 姜文钰；

【导师】 刘东；

【作者基本信息】 中国石油大学 ， 化学工程与技术， 2011， 硕士

【摘要】 本研究考察了轻组分、大分子聚合物和表面活性剂对委内瑞拉重油粘度和胶体稳定性的影响,并对热反应条件下体系的传热状况、反应生焦状况、产物分布和组份变化进行了研究和探讨。研究表明,轻组分循环对委内瑞拉重油流动性有一定程度的改善作用。在重油中加入柴油或蜡油组分的质量分数<1%时,降粘效果相差不大;加入量>1%时,柴油组分的降粘幅度远大于蜡油组分。在重油中加入柴油组分,油样胶体稳定性下降,加入蜡油组分能改善油样胶体稳定性。不论加入柴油组分还是蜡油组分,热反应过程的传热情况都会有一定的改善;加入柴油组分能促进生焦,使生焦诱导期缩短,产物中常压渣油的生焦前驱物含量减少;加入蜡油组分能抑制生焦,使生焦诱导期延长,产物中常压渣油的生焦前驱物含量增加。在合成的降粘剂中,SMA(苯乙烯-马来酸酐-丙烯酸十八醇酯三元共聚物)对重油有较好的降粘效果,SMA不论与柴油组分还是蜡油组分复配,均能改善油样的胶体稳定性,且SMA与柴油组分复配效果比与蜡油组分复配效果好。实验表明,SMA能抑制生焦,使生焦诱导期延长;SMA与柴油组分复配添加进行热反应时,常压渣油中饱和分和芳香分含量减少,生焦前驱物含量明显增加;与蜡油组分复配进行热反应时,常压渣油中饱和分和芳香分的含量增加,生焦前驱物含量明显减少。SDBS(十二烷基苯磺酸钠)能改善重油的胶体稳定性,并能改善热反应过程的传热情况。但加入SDBS会促进生焦,使生焦诱导期缩短。SDBS与柴油组分复配添加进行热反应时,生焦率下降,生焦诱导期延长,常压渣油中生焦前驱物含量有明显增加。与蜡油组分复配添加进行热反应时,生焦率略有增加,常压渣油中饱和分含量明显减少,芳香分含量明显增加。更多还原

【Abstract】 The impact of light distillate, macromolecular polymers and surfactant on the viscosity and stability colloid of Venezuelan heavy oil was studied and researched the heat transfer, formation of coke, product distribution and component changes of the thermal reaction. The flowability was improved when adding light distillate into Venezuelan heavy oil. The viscosity reducing affects little difference when adding mass fraction of diesel or wax <1%; when addition > 1%, diesel is better than wax. The stability colloid was improved by adding wax and broke by adding diesel.Whether to add diesel or wax, the heat transfer of thermal reaction was improved; Adding diesel can promote the formation of coke, shortened the coke induction period,reduce the coke precursor of atmospheric residue. Adding wax is quite the reverse.SMA (styrene-maleic anhydride-octadecyl acrylate terpolymer) has the best effects on the viscosity reduction of heavy oil. The stability colloid was improved regardless of SMA blends with diesel or wax, and SMA blends with diesel reduced viscosity steeper then wax. Experiments show that the formation of coke was restrained and the coke induction period was lengthening when adding SMA. The saturated hydrocarbon and aromatics of asphalt decreased and the coke precursor of atmospheric residue increased when SMA mixture with diesel added in heavy oil. SMA mixture with wax is quite the reverse.The stability colloid of heavy oil and the heat transfer of thermal reaction were improved when adding SDBS (sodium dodecyl benzene sulfonate). But the formation of coke was promoted and the coke induction period wae shortened at the same time. SDBS mixture with diesel added in heavy oil played a part in decreasing the formation of coke, lengthening the coke induction period, and increasing the coke precursor of atmospheric residue. SDBS mixture with wax is quite the reverse.更多还原