能源化学(英文版)

能源化学(英文) ›› 2015, Vol. 21 ›› Issue (4): 472-476.

• ARTICLES • 上一篇    下一篇

Synthesis of silica/metatitanic acid nanocomposite and evaluation of its catalytic performance for aquathermolysis reaction of extra-heavy crude oil

Xueliang Liua, Yiguang Lia, Zhijun Zhanga, Xiaohong Lia, Mengyun Zhaob, Changming Sub   

  1. a Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, Henan, China;
    b Institute of Petroleum Exploration and Production, SINOPEC, Beijing 100083, China
  • 收稿日期:2015-02-06 修回日期:2015-03-27 发布日期:2015-08-21
  • 通讯作者: Zhijun Zhang
  • 基金资助:

    This research is financially supported by the National Natural Science Foundation of China (grant Nos. 21371047 and 21471047).

Synthesis of silica/metatitanic acid nanocomposite and evaluation of its catalytic performance for aquathermolysis reaction of extra-heavy crude oil

Xueliang Liua, Yiguang Lia, Zhijun Zhanga, Xiaohong Lia, Mengyun Zhaob, Changming Sub   

  1. a Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, Henan, China;
    b Institute of Petroleum Exploration and Production, SINOPEC, Beijing 100083, China
  • Received:2015-02-06 Revised:2015-03-27 Published:2015-08-21
  • Contact: Zhijun Zhang
  • Supported by:

    This research is financially supported by the National Natural Science Foundation of China (grant Nos. 21371047 and 21471047).

摘要： A lipophilic silica/metatitantic acid (denoted as SiO2/H2TiO3) nanocomposite was synthesized by hydrothermal reaction with surface-modified SiO2 as the lipophilic carrier. As-synthesized SiO2/H2TiO3 nanocomposite was used as a catalyst to promote the aquathermolysis reaction of extra-heavy crude oil thereby facilitating the recovering from the deep reservoirs at lowered temperature. The catalytic performance of the as-synthesized SiO2/H2TiO3 catalyst for the aquathermolysis reaction of the heavy oil at a moderate temperature of 150 ℃ was evaluated in relation to the structural characterizations by TEM, FTIR, XRD and FESEM as well as the determination of the specific surface area by N2 adsorption-desorption method. Findings indicate that as-synthesized SiO2/H2TiO3 nanocomposite exhibits an average size of about 20 nm as well as good lipophilicity and dispersibility in various organic solvents; and it shows good catalytic performance for the aquathermolysis reaction of the extra-heavy oil extracted from Shengli Oilfield of China. Namely, the assynthesized SiO2/H2TiO3 catalyst is capable of significantly reducing the viscosity of the tested heavy oil from 58,000 cP to 16,000 cP (referring to a viscosity reduction rate of 72.41%) at a mass fraction of 0.5%, a reaction temperature of 150 ℃ and a reaction time of 36 h, showing potential application in downhole upgrading heavy crude oils.

关键词: SiO2/H2TiO3 nanocomposite, Catalytic aquathermolysis, Heavy oil, Viscosity reduction

Abstract: A lipophilic silica/metatitantic acid (denoted as SiO2/H2TiO3) nanocomposite was synthesized by hydrothermal reaction with surface-modified SiO2 as the lipophilic carrier. As-synthesized SiO2/H2TiO3 nanocomposite was used as a catalyst to promote the aquathermolysis reaction of extra-heavy crude oil thereby facilitating the recovering from the deep reservoirs at lowered temperature. The catalytic performance of the as-synthesized SiO2/H2TiO3 catalyst for the aquathermolysis reaction of the heavy oil at a moderate temperature of 150 ℃ was evaluated in relation to the structural characterizations by TEM, FTIR, XRD and FESEM as well as the determination of the specific surface area by N2 adsorption-desorption method. Findings indicate that as-synthesized SiO2/H2TiO3 nanocomposite exhibits an average size of about 20 nm as well as good lipophilicity and dispersibility in various organic solvents; and it shows good catalytic performance for the aquathermolysis reaction of the extra-heavy oil extracted from Shengli Oilfield of China. Namely, the assynthesized SiO2/H2TiO3 catalyst is capable of significantly reducing the viscosity of the tested heavy oil from 58,000 cP to 16,000 cP (referring to a viscosity reduction rate of 72.41%) at a mass fraction of 0.5%, a reaction temperature of 150 ℃ and a reaction time of 36 h, showing potential application in downhole upgrading heavy crude oils.

Key words: SiO2/H2TiO3 nanocomposite, Catalytic aquathermolysis, Heavy oil, Viscosity reduction