稠油注空气低温催化氧化行为研究

Study of Catalytic Behavior on Low Temperature Oxidation of Heavy Crude Oil by Air Injection

本文针对新疆油田稠油油样,加入硫酸镍做催化剂进行低温催化氧化研究。利用热失重分析(TGA)低温氧化(LTO)氧化动力学,及高温高压氧化反应管模拟地下LTO过程,采用气相色谱分析不同时间产出气中O2、CO2、CO的体积含量变化,分析反应前后油样族组成(SARA)含量变化。结果表明,使用硫酸镍做催化剂可降低LTO反应活化能、明显提高O2的消耗量,通过CO与CO2含量变化分析催化机理,显示硫酸镍对LTO断键反应具有催化作用。

In this research, the LTO kinetics of heavy oil(from Xinjiang oil field) was studied by using ther-mogravimetric analysis (TGA), and LTO simulation tests were performed with/without catalyst (nickel sulfate).During simulation tests, the changes of volume fraction of O2, CO2 and CO were analyzed by gas chromatography. The SARA content of heavy oil before and after the reaction was analyzed. The results show that using nickel sulfate as catalyst can reduce the activation energy of LTO reaction, and significantly increase the consumption of O2. By analyzing the changes of CO and CO2 content, the results show that nickel sulfate has a catalytic effect on LTO breakage reaction.