非常规重油热反应性能研究

发布时间：2018-07-11 17:25

本文选题：非常规重油 + 热反应性能　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：非常规重油储量丰富,其利用价值逐渐受到重视。目前对非常规重油的热反应性能研究较少。本论文在重油热加工评价仪上,对油砂沥青、催化油浆以及克拉玛依超稠油进行热反应性能评价,为非常规重油热加工提供参考。实验考察了油砂沥青的结焦倾向、最大可裂化度及残渣油稳定性。结果表明:油砂沥青结焦因子在0.68~1.8%之间,结焦倾向较小;最大可裂解度在40~45%之间,油样热裂解深度小于该范围时,可避免严重结焦;残渣油在430℃-40min、450℃-10min条件下发生分层,渣油稳定性变差,此时缩合深度在2%左右。基于热反应产物分布数据,建立了油砂沥青集总动力学模型,总裂解反应模型预测偏差较小,总缩合及390℃组分反应模型预测偏差较大,主要原因是未考虑产物二次反应。实验考察了催化油浆的结焦倾向,分析了热反应产物随反应时间的变化规律,并建立了催化油浆集总动力学模型。结果表明:催化油浆结焦因子在5~13%之间,结焦倾向较大;低温条件裂解转化率低,产物主要以蜡油为主;总裂解反应模型预测结果偏差较小,重组分集总预测结果偏差较大。实验考察了克拉玛依超稠油的结焦倾向以及裂解难易程度。结焦因子在5~10%之间,油样结焦倾向适中。采用前期开发的裂解难易程度评价方法考察结果表明,克拉玛依超稠油属较难裂解油样。基于上述实验评价,结果表明油砂沥青结焦倾向低,液体收率高,是较好的热加工原料。催化油浆结焦倾向严重,低温条件裂解转化率低,不宜单独作为热加工原料。克拉玛依超稠油属结焦倾向适中,难裂解油样,作为热加工原料时应适当提高裂解深度。
[Abstract]:The unconventional heavy oil reserves are rich and its utilization value is gradually paid attention. At present, the thermal reaction performance of unconventional heavy oil is seldom studied. In this paper, the thermal reaction performance of oil sands asphalt, catalytic oil slurry and Karamay super heavy oil is evaluated on the heavy oil thermal processing evaluation instrument, which provides a reference for the unconventional heavy oil hot processing. The coking tendency of sand bitumen, the maximum cleavage degree and the stability of residue oil showed that the coking factor of oil sand asphalt was small in 0.68~1.8%, and the maximum cracking degree was between 40~45% and the depth of thermal cracking of oil samples was less than that in this range. The residue could be stratified at 430 C -40min and 450 C -10min. The oil stability is worse, the condensation depth is about 2% at this time. Based on the distribution data of thermal reaction products, the aggregate dynamic model of oil sand asphalt is set up, the prediction deviation of the total cracking reaction model is small, the total condensation and the 390 C component reaction model predict a large deviation. The main reason is that the two reaction of the product is not considered. The tendency of the heat reaction product with the reaction time was analyzed, and the total kinetic model of the catalytic oil slurry was established. The results showed that the coking factor of the catalytic oil slurry was in the 5~13%, the coking tendency was larger, the conversion rate was low at low temperature and the main product was wax oil, and the prediction result of the total cracking reaction model was small and the recombination diversity was small. The deviation of the total prediction results is large. The coking tendency of the super heavy oil in Karamay and the difficulty of cracking are investigated in the experiment. The coking factor is between 5~10% and the coking tendency of the oil sample is moderate. The result of the evaluation method of the cracking difficulty degree of the earlier development shows that the Karamay super heavy oil is more difficult to crack the oil sample. Based on the experimental evaluation above, the conclusion is made. The results show that the coking tendency of the oil sand asphalt is low and the liquid yield is high. It is a good raw material for hot processing. The coking tendency of the catalytic slurry is serious and the conversion rate of pyrolysis is low at low temperature. It is not suitable to be used as the raw material for heat processing. The coking tendency of Karamay super heavy oil is moderate and the oil sample is hard to crack, and the cracking depth should be properly improved as the raw material for heat processing.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE622

【参考文献】