Effect of SiO2 nanofluid with different concentrations on the wettability of coal

被引：29
作者：
Zhang, Tiancheng [1 ]
Zou, Quanle [1 ]
Li, Ke [1 ]
Jia, Xueqi [1 ]
Jiang, Chengzi [1 ]
Niu, Xingang [2 ]
机构：
[1] Chongqing Univ, Sch Resources & Safety Engn, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China
[2] China Coal Technol & Engn Grp, Gas Res Branch, Chongqing Res Inst, Chongqing 400037, Peoples R China
来源：
FUEL | 2022年 / 321卷
基金：
中国国家自然科学基金;
关键词：
Coal seam water injection; Nanofluid concentration; Contact angle; Wettability; ENHANCED OIL-RECOVERY; GAS OUTBURST; SURFACTANT; STABILITY; NANOPARTICLES; PERFORMANCE; EFFICIENCY; CARBONATE; INFUSION; AGENT;
D O I：
10.1016/j.fuel.2022.124041
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Water-based SiO2 nanofluid, a wetting agent, has been proved to be feasible in improving the control effect of coal seam water injection against coal and gas outburst. However, the effect of nanofluid concentration on the control effect is not clear. Therefore, it is necessary to investigate the wettability-enhancing effect of nanofluid with different concentrations. In this paper, firstly, the effect of SiO2 nanofluid with different concentrations on water adsorption capacity of coal was obtained. Then, the wettability-enhancing effect of SiO2 nanofluid with different concentrations was investigated by contact angle tests. Finally, the effect of nanofluid concentration on the wettability enhancement of coal was revealed. The results showed that increasing the nanofluid concentration can enhance the water adsorption capacity and wettability of coal. In addition, the wettability-enhancing effect of nanofluid gradually got worse with time, while the stability of wettability-enhancing effect gradually got better. Furthermore, the 0.5 wt% nanofluid had the best sustainability and stability of the wettability-enhancing effect, while 1.0 wt% had the worst sustainability and stability. The research achievements could provide important basis for the selection of nanofluid concentrations in coal seam water injection.
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页数：9
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