期刊
ENERGY & FUELS
卷 34, 期 7, 页码 7965-7973出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.9b04487
关键词
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资金
- Sichuan Youth Science & Technology Foundation [2017JQ0010]
- National High Technology Research & Development Program [2016ZX05053, 2016ZX05014-005-007]
- Key Fund Project of Educational Commission of Sichuan Province [16CZ0008]
- Explorative Project Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University) [G201601]
- China Postdoctoral Science Foundation [2019M650250]
- National Natural Science Foundation of China [41902303]
Exploring ways to efficiently and inexpensively exploit and transport high-viscosity and high-pour-point crude oil is very important, and use of silica nanoparticles (nano-SiO2) to reduce the pour point and viscosity of this oil is promising. For this purpose, we modified nano-SiO2 in two ways. First, we used the coupling agent KH570 to replace hydroxyl groups in nano-SiO2 with organic groups. Next, we used four monomers (octadecyl methacrylate, styrene, maleic anhydride, and acrylamide) for graft copolymerization of the modified nano-SiO2 to obtain a nano-SiO2 composite. This method of modifying the nano-SiO2 surface reduces the agglomeration tendency of unmodified nano-SiO2 and disperses the composite material in the organic solvent. A synthetic nanocomposite material could reduce the viscosity of heavy oil with different viscosities and pour points by more than 60%. It could also reduce the pour points of heavy oil by more than 10 degrees C, thus showing superiority over the traditional ethylene-vinyl acetate flow modifier.
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