空气低温氧化体系对稠油组成的影响

通过对辽河稠油进行低温氧化模拟实验， 考察了不同体系氧化反应前后气相组成、 稠油组成及性质的改变情况。结果表明： 稠油与空气发生的低温氧化反应属于吸氧反应， 催化氧化反应使气体中氧气含量下降到 2.71%， 消耗了空气中 87% 的氧， 氧化使稠油酸值及黏度增大； 加水催化氧化使稠油中胶质含量降低13.95%， 沥青质含量上升 4.81%， 胶质、 沥青质总含量降低， 重组分降解了 17.94%； 环烷酸盐催化剂体系对稠油有良好的催化活性， 促进了稠油氧化和裂解； 水在稠油空气低温催化氧化过程中起到了促进重组分裂解的作用。

Effect of Low Temperature Air Oxidation on the Composition of Heavy Oil

In the low-temperature oxidation simulation experiments of Liaohe heavy oil， the change of compositionand nature of gas and heavy oil before and after the oxidation reaction of different system is inspected. The resultsdemonstrate as follows： The low temperature oxidation reactions occurred between heavy oil and air is oxygen-addition reactions， which decreases the oxygen content in the gas to 2.71%， consumes 87% of the oxygen in the air，and increases the acid number and viscosity of heavy oil. Water promoted oxidation of heavy oil makes the resincontent decrease 13.95%， the asphaltene content increase 4.81%， the total resin and asphaltene content decrease，and the heavy components degrade 17.94%. The naphthenate catalyst system has an excellent catalytic oxidationactivity， which promotes the oxidation and cracking of heavy oil. Water promotes heavy constituent crack in thelow temperature catalytic oxidation reactions occurred between heavy oil and air.