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| 1 | Influence mechanism of pore-scale anisotropy and pore distribution heterogeneity on permeability of porous media显示文摘Based on micro-CT scanning experiments, three-dimensional digital cores of tight sandstones were established to quantitatively evaluate pore-scale anisotropy and pore-distribution heterogeneity. The quartet structure generation set method was used to generate three-dimensional anisotropic, heterogeneous porous media models. A multi-relaxation-time lattice Boltzmann model was applied to analyze relationships of permeability with pore-scale anisotropy and pore distribution heterogeneity, and the microscopic influence mechanism was also investigated. The tight sandstones are of complex pore morphology, strong anisotropy and pore distribution heterogeneity, while anisotropy factor has obvious directivity. The obvious anisotropy influences the orientation of long axis of pores and fluid flow path, making tortuosity smaller and flowing energy loss less in the direction with the greater anisotropy factor. The strong correlation of tortuosity and anisotropy is the inherent reason of anisotropy acting on permeability. The influence of pore distribution heterogeneity on permeability is the combined effects of specific surface area and tortuosity, while the product of specific surface area and tortuosity shows significantly negative correlation with heterogeneity. The stronger the pore distribution heterogeneity, the smaller the product and the greater the permeability. In addition, the permeability and tortuosity of complex porous media satisfy a power relation with a high fitting precision, which can be applied for approximate estimation of core permeability. | LI Tao LI Min JING Xueqi XIAO Wenlian CUI Qingwu | 2019 | Petroleum Exploration and Development2019，46，3： | 0 |
| 2 | Preparation and the Pore Structure of Viscose-based Activated Carbon Fibers Treated with Pretreatment Reagents显示文摘The viscose rayon was pretreated with four different pre-treatment reagents respectively, and the preparation ofactivated carbon fibers (ACF) was performed undersame carbonizing and activating conditions. The poresize distribution, the specific surface area, and the porestructure parameter of these viscose - based ACF werestudied by using quartz spring balance BET- weightmethod. The experiment result indicates that the poresize distribution and the pore structure parameter ofACF is varied by using different pretreatment reagents. | 罗艳 黄永辉 | 2000 | Journal of China Textile University(English Edition)2000，17，2： | 0 |
| 3 | BET Surface Area and Porous Structure of Fullerenes and Fullerene Soots显示文摘IntroductionAfascinatingsolidblackcondensate(herecaledfulerenesoot)isgeneratedinthegasphaseanddepositedduringthedischargeinaK... | CHEN Jian xin a,c , SHENG Guo ying b , LIU Shu ying a ** , LIU Zi yang a LIU Zhi qiang a and FU Jia mo b (Changchun Institute of Applied Chemistry a, Chinese Academy of Sciences, Changchun, 130022 State K | 1999 | Chemical Research in Chinese Universities1999，15，1： | 0 |
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