Search Results - "Guanhua Ni"

Gas desorption characteristics effected by the pulsating hydraulic fracturing in coal by Guanhua, Ni, Kai, Dong, Shang, Li, Qian, Sun

“…In order to clarify the effect of pulsating fracturing on gas comprehensive desorption, experimental study of gas desorption characteristics effected by the…”
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Effect of NaCl-SDS compound solution on the wettability and functional groups of coal by Guanhua, Ni, Qian, Sun, Meng, Xun, Hui, Wang, Yuhang, Xu, Weimin, Cheng, Gang, Wang

“…•The surface tension and contact angle can be reduced by adding NaCl.•Treated with SDS and NaCl can change the content of functional groups in coal.•The…”
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Effect of ionic liquid treatment on pore structure and fractal characteristics of low rank coal by Zhao, Li, Guanhua, Ni, Lulu, Sun, Qian, Sun, Shang, Li, Kai, Dong, Jingna, Xie, Gang, Wang

“…[Display omitted] •Water treated reduced the pore volume and specific surface area.•Compared with water treated, mesopore volume increased in ionic liquid…”
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The influence of surfactant on pore fractal characteristics of composite acidized coal by Hongchao, Xie, Guanhua, Ni, Shang, Li, Qian, Sun, Kai, Dong, Jingna, Xie, Gang, Wang, Yixin, Liu

“…[Display omitted] •SDS synergistic acidification increased the proportion of seepage pores by 5.99%.•SDS synergistic acidification promotes the pores…”
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Molecular structure characterization of lignite treated with ionic liquid via FTIR and XRD spectroscopy by Zhao, Li, Guanhua, Ni, Hui, Wang, Qian, Sun, Gang, Wang, Bingyou, Jiang, Chao, Zhang

“…In order to characterize the effect of ionic liquid concentration on the molecular structure of lignite, the X-ray diffraction (XRD) and Fourier transform…”
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Effects of pulse wave on the variation of coal pore structure in pulsating hydraulic fracturing process of coal seam by Jingna, Xie, Jun, Xie, Guanhua, Ni, Rahman, Sheik, Qian, Sun, Hui, Wang

“…Coal pore structure is not only closely related to gas adsorption, but also affect the dynamic characteristics of gas desorption and diffusion. In order to…”
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The effect of adding surfactant to the treating acid on the chemical properties of an acid-treated coal by Jingna, Xie, Guanhua, Ni, Hongchao, Xie, Shang, Li, Qian, Sun, Kai, Dong

“…In order to enhance the effect of acidizing coal seam with the compound solution, in this paper, the chemical characteristics of treated coal samples were…”
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Effects of [Bmim][Cl] ionic liquid with different concentrations on the functional groups and wettability of coal by Guanhua, Ni, Zhao, Li, Qian, Sun, Shang, Li, Kai, Dong

“…[Display omitted] •Treated with ionic liquids can change the content of functional groups in coal.•The content of CH3 and CH2 groups had the greatest effect on…”
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Research of wetting selectivity and wetting effect of imidazole ionic liquids on coal by Guanhua, Ni, Hui, Wang, Baisheng, Nie, Yan, Wang, Haoran, Dou, Shouqing, Lu, Gang, Wang

“…•Use of two imidazole ionic liquids and three different coal samples.•Identify key ions that reduce the contact angle.•Determine the optimum wetting conditions…”
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Improving the permeability of coal seam with pulsating hydraulic fracturing technique: A case study in Changping coal mine, China by Guanhua, Ni, Hongchao, Xie, Zhao, Li, Lingxun, Zhuansun, Yunyun, Niu

“…•To improve the gas permeability of coal seam, the industrial experiment of pulsating hydraulic fracturing (PHF) were carried out.•The pulsating peak pressure…”
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The effect of anionic surfactant (SDS) on pore-fracture evolution of acidified coal and its significance for coalbed methane extraction by Guanhua, Ni, Hongchao, Xie, Shang, Li, Qian, Sun, Dongmei, Huang, Yanying, Cheng, Ning, Wang

“…[Display omitted] •The SDS can promotes the pressure relief and enlarge permeability effect of the acidified coal body.•Adding the SDS, the proportion of coal…”
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Microstructure characteristics of lignite under the synergistic effect of oxidizing acid and ionic liquid [Bmim][Cl] by Shang, Li, Guanhua, Ni, Baisheng, Nie, Shouqing, Lu, Xijian, Li, Gang, Wang

“…•HNO3, [Bmim][Cl] and HNO3/[Bmim][Cl] can promote the aromaticity of coal.•The synergistic effect makes the aliphatic structure easier to fall off.•The…”
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Fine characterization of pore structure of acidified anthracite based on liquid intrusion method and Micro-CT by Yongzan, Wen, Guanhua, Ni, Xinyue, Zhang, Yicheng, Zheng, Gang, Wang, Zhenyang, Wang, Qiming, Huang

“…Acidification erosion can seriously affect the pore structure characteristics of anthracite. In this paper, the low-temperature nitrogen adsorption method,…”
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Development and performance testing of the new sealing material for gas drainage drilling in coal mine by Guanhua, Ni, Kai, Dong, Shang, Li, Qian, Sun, Dongmei, Huang, Ning, Wang, Yanying, Cheng

“…In order to enhance the drilling sealing effect and improve the gas drainage efficiency of coal mines, this paper combines material composite mechanism,…”
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Modeling and optimization of mechanical properties of drilling sealing materials based on response surface method by Mao, Jing, Guanhua, Ni, Yuhang, Xu, Hui, Wang, Zhao, Li, Zhenyang, Wang

“…To improve the sealing effect of a borehole and the efficiency of gas extraction, an ideal ratio of modified materials is needed to provide the optimal…”
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Coal-CH4/CO2 high-low orbit adsorption characteristics based on molecular simulation by Zhao, Li, Guanhua, Ni, Yongzan, Wen, Hehe, Jiang, Xiangfei, Zhang, Gang, Wang, Zhenyang, Wang

“…•The molecular formula of Tianchi coal is C226H129O6N3S.•The adsorbed molecules are distributed in a hyperboloid shape.•Gas molecules are mainly adsorbed on…”
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Effect of optimized pore structure on sealing performance of drilling sealing materials in coal mine by Kai, Dong, Guanhua, Ni, Yuhang, Xu, Meng, Xun, Hui, Wang, Shang, Li, Qian, Sun

“…•Material synergy optimization effect is more potent than a single substance.•Styrene-acrylic emulsion can greatly enhance the elastic modulus of…”
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Study on the Wettability of a Composite Solution Based on Surface Structures of Coal by Jiang, Bingyou, Sun, Qian, Ni, Guanhua

“…In order to research the influence of composite surfactant solutions on the wetting ability of coal, the wettability parameters, pore structure parameters, and…”
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Characterization of Coal Micro-Pore Structure and Simulation on the Seepage Rules of Low-Pressure Water Based on CT Scanning Data by Gang Zhou, Qi Zhang, Ruonan Bai, Guanhua Ni

“…This paper used the X-ray three-dimensional (3D) microscope and acquired, through CT scanning, the 3D data of the long-frame coal sample from the Daliuta Coal…”
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Influence of Geo-stress on Dynamic Response Characteristics of Coal and Gas Outburst by Zhou, Bin, Xu, Jiang, Peng, Shoujian, Yan, Fazhi, Yang, Wei, Cheng, Liang, Ni, Guanhua

“…The influence of tectonic, geostatic, and mining stresses on coal and gas outburst (CGO) becomes more obvious with increasing mining depth. The limitations of…”
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