Shen Zhe, Fang Xiangqing, He Wenbo, Zhang Le, Li Yongfei, Qi Guobin, Xin Xin, Zhao Bin, Chen Gang
The Institute of Energy and Architecture, Xi'an Aeronautical Institute, Xi'an 710077, China.
Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields, Xi'an Shiyou University, Xi'an 710065, China.
Molecules. 2024 Apr 29;29(9):2057. doi: 10.3390/molecules29092057.
In order to study the synergistic effects of exogenous catalysts and in situ minerals in the reservoir during heavy oil aquathermolysis, in this paper, a series of simple supported transition metal complexes were prepared using sodium citrate, chloride salts and bentonite, and their catalytic viscosity reduction performances for heavy oil were investigated. Bentonite complex catalyst marked as B@Zn(II)L appears to be the most effective complex. B@Zn(II)L was characterized by scanning electron microscopy (SEM), Fourier-Transform Infrared (FTIR) spectroscopy, thermo-gravimetric analysis (TGA) and N2 adsorption-desorption isotherms. Under optimized conditions, the viscosity of the heavy oil was decreased by 88.3%. The reaction temperature was reduced by about 70 °C compared with the traditional reaction. The results of the group composition analysis and the elemental content of the heavy oil indicate that the resin and asphaltene content decreases, and the saturated and aromatic HC content increases. The results of TGA and DSC of the heavy oil show that the macromolecular substances in the heavy oil were cracked into small molecules with low boiling points by the reaction. GC-MS examination of water-soluble polar compounds post-reaction indicates that B@Zn(II)L can diminish the quantity of polar substances in heavy oil and lower the aromatic nature of these compounds. Thiophene and quinoline were utilized as model compounds to investigate the reaction mechanism. GC-MS analysis revealed that C-C, C-N and C-S bonds were cleaved during the reaction, leading to a decrease in the viscosity of heavy oil.
为了研究稠油水热裂解过程中储层中外源催化剂与原位矿物的协同作用，本文采用柠檬酸钠、氯化物盐和膨润土制备了一系列简单的负载型过渡金属配合物，并研究了它们对稠油的催化降粘性能。标记为B@Zn(II)L的膨润土复合催化剂似乎是最有效的配合物。通过扫描电子显微镜（SEM）、傅里叶变换红外（FTIR）光谱、热重分析（TGA）和N2吸附-脱附等温线对B@Zn(II)L进行了表征。在优化条件下，稠油粘度降低了88.3%。与传统反应相比，反应温度降低了约70℃。稠油族组成分析和元素含量结果表明，树脂和沥青质含量降低，饱和烃和芳烃含量增加。稠油的TGA和DSC结果表明，稠油中的大分子物质通过反应裂解为低沸点小分子。反应后对水溶性极性化合物的GC-MS检测表明，B@Zn(II)L可以减少稠油中极性物质的数量并降低这些化合物的芳烃性质。以噻吩和喹啉为模型化合物研究反应机理。GC-MS分析表明，反应过程中C-C、C-N和C-S键发生断裂，导致稠油粘度降低。
