Thermal and Structural Analysis of Asphaltine in Heavy Oil before and after the Hydrogen Donor Catalytic Reaction of Upgrading and Viscosity Reduction under the Effect of Auxiliary Agents

Abstract:

This paper applies high-pressure reactor to simulate conditions of thermal recovery and uses formic acid as hydrogen donor body, self-made oil-soluble organic nickel salt as catalyst and urea as auxiliary agents to conduct the study on of heavy oil. By TG-DTA, IR and NMR spectra, it makes an analysis on thermal transformation behavior and structural changes of asphaltine in heavy oil before and after the reaction of upgrading and viscosity reduction under the effect of auxiliary agents. The results show that the stability of the asphaltine in heavy oil after aquathermolysis reaction of hydrogen donor catalyzing is decreased. Infrared spectroscopy analysis reveals that the absorption peaks of IR functional groups of asphaltine in heavy oil is unchanged and the addition of auxiliary agents basically does not change the structure of asphaltine. NMR structural analysis shows that.

• Periodical: Applied Mechanics and Materials (Volumes 55-57)
• Pages: 918-923
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.55-57.918
• Online since: May 2011
• Authors: Fa Jun Zhao, Yong Jian Liu, Xian You Qi, He Wang, Jie Zhao
• Keywords: Aquathermolysis, Auxiliary Agents, Catalytic, Heavy Oil, Hydrogen Donor, Upgrading

References

[1] Zhao Wei, Zhang Zhiyuan. Heavy oil –an important energy in 21 century [J]. The world oil industry, 7 (3): 46-49(1999).

[2] Zhao Jun, Liu Jian, Zhao Guo, et al. Heavy oil of hydrogen donor catalytic upgrading Under the conditions of steam injection and the properties of thermal decomposition of its asphaltine [J]. Chemical Engineering Progress, 27 (9): 1453-1459(2008).

[3] Liu Yongjian, Zhao Jun, Zhao Guo, et al. experimental study on the upgrading of aquathermolysis of Hydrogen formic acid in heavy oil [J]. Oilfield Chemistry, 25 (2): 133-136(2008).

[4] Dong Xigui, Lei Qunfang, Yu Qingsen. Study on the Kinetics of pyrolysis Asphaltine [J]. Journal of Zhejiang University Science Edition, 31 (6): 652-656(2004).

[5] Po-liang, Chao H, Weller S W. Coal liquifaction with encapsulated catalyst [J]. Ind Eng Chem Proc Des Dev., 22: 660-662(1983).

DOI: 10.1021/i200023a019

[6] Zhu Huaiwu: Spectral analysis on organic molecular structure[M]. Beijing: Chemical Industry Press(2005).

[7] Clark P D, Hyne J B, Tyrer J D. Chemistry of organosulfur compound type occuring in heavy oil sands. 2. Influence of pH on the high temperature hydrolysis of tetrahydrothiophene and thiophene [J]. Fuel, 1984, 63(1): 125-128.

DOI: 10.1016/0016-2361(84)90266-7