The Role of Adsorbed Water on Pore Structure Characteristics and Methane Adsorption of Shale Clay

2018 ◽  
Author(s):  
Dong Feng ◽  
Xingfang Li ◽  
Chaojie Zhao ◽  
Jing Li ◽  
Qing Liu ◽  
...  
Keyword(s):  
Pore Structure ◽  
Adsorbed Water ◽  
Methane Adsorption ◽  
Structure Characteristics

scholarly journals Pore structure characteristics and methane adsorption and desorption properties of marine shale in Sichuan Province, China

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6436-6443 ◽  
Author(s):  
Yue Changtao ◽  
Li Shuyuan ◽  
Wen Hailong ◽  
Yang Fei ◽  
Xu xinyi Xu xinyi
Keyword(s):  
Pore Structure ◽  
Gravimetric Method ◽  
Sichuan Province ◽  
Methane Adsorption ◽  
Magnetic Suspension ◽  
Isothermal Adsorption ◽  
Adsorption And Desorption ◽  
Structure Characteristics ◽  
Magnetic Suspension Balance ◽  
Marine Shale

Isothermal adsorption and desorption experiments were carried out using gravimetric method with magnetic suspension balance.

scholarly journals Microscopic Pore Structure Characteristics and Methane Adsorption of Vitrain and Durain

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Fu Yang ◽  
Dongmin Ma ◽  
Zhonghui Duan ◽  
Dazhong Ren ◽  
Tao Tian ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Pore Structure ◽  
Coalbed Methane ◽  
Nitrogen Adsorption ◽  
Ash Content ◽  
Methane Adsorption ◽  
Low Rank ◽  
Reservoir Evaluation ◽  
Structure Characteristics ◽  
Carbon Dioxide Co2

During reservoir evaluation, the microscopic pore structure of low-rank coal is mainly characterized in order to study the coalbed methane diffuse and migration mechanisms and control. The low-rank coals are very different in pore type and size, so it is necessary to use various techniques to describe their pore structure. For vitrain and durain of the Coal Member of the Yan’an Formation from Huanglong Coalfield, their chemical composition and microscopic pore structure characteristics were studied, and the factors of influencing the pore size distribution (PSD) were explored. Obviously, vitrain and durain are different in chemical composition. Vitrain has higher moisture content, volatile yield, and vitrinite group content than durain. Vitrain and durain mainly contain vitrinite and inertinite, respectively. The pore structure characteristics (e.g., pore types and PSD) of vitrain and durain were systematically by mercury intrusion porosimetry (MIP), low-temperature nitrogen adsorption, and carbon dioxide (CO2) adsorption. The vitrain and durain samples with a micropore size of <2 nm were mainly tested on their specific surface area (SSA) and pore volume (PV). The results show that microporous vitrain has larger SSA and PV than microporous durain, while mesoporous and macroporous vitrain has smaller SSA and PV than mesoporous and macroporous durain. SSA is very positively correlated with PV. The ash content is negatively correlated with SSA and PV. The ash content influences microporous vitrain more greatly than microporous durain, but mesoporous and macroporous durain more greatly than mesoporous and macroporous vitrain. SSA is positively correlated with the vitrinite content of durain and negatively correlated with the inertinite and exinite contents of durain. However, SSA is negatively correlated with the vitrinite and exinite contents of vitrain and positively correlated with the inertinite content of vitrain. Vitrain has higher methane adsorption capacity, desorption rate, and recovery ratio than durain. There are parameters that are obviously affected by the micropore characteristics.

Development of pore structure characteristics of a weathered crust elution-deposited rare earth ore during leaching with different valence cations

2021 ◽  
Vol 201 ◽  
pp. 105579
Author(s):  
Lingbo Zhou ◽  
Xiaojun Wang ◽  
Chengguang Huang ◽  
Hao Wang ◽  
Huachang Ye ◽  
...  
Keyword(s):  
Rare Earth ◽  
Pore Structure ◽  
Structure Characteristics ◽  
Weathered Crust

Fabrication of poly (1, 8-octanediol-co-Pluronic F127 citrate)/chitin nanofibril/bioactive glass (POFC/ChiNF/BG) porous scaffold via directional-freeze-casting

2020 ◽  
Vol 40 (7) ◽  
pp. 591-599
Author(s):  
Yaling Tian ◽  
Kai Liang ◽  
Yali Ji
Keyword(s):  
Bioactive Glass ◽  
Porous Structure ◽  
Pore Structure ◽  
Porous Scaffold ◽  
Pluronic F127 ◽  
Porous Scaffolds ◽  
Freeze Casting ◽  
Promising Candidate ◽  
Complete Replacement

AbstractThe citrate-based thermoset elastomer is a promising candidate for bone scaffold material, but the harsh curing condition made it difficult to fabricate porous structure. Recently, poly (1, 8-octanediol-co-Pluronic F127 citrate) (POFC) porous scaffold was creatively fabricated by chitin nanofibrils (ChiNFs) supported emulsion-freeze-casting. Thanks to the supporting role of ChiNFs, the lamellar pore structure formed by directional freeze-drying was maintained during the subsequent thermocuring. Herein, bioactive glass (BG) was introduced into the POFC porous scaffolds to improve bioactivity. It was found the complete replacement of ChiNF particles with BG particles could not form a stable porous structure; however, existing at least 15 wt% ChiNF could ensure the formation of lamellar pore, and the interlamellar distance increased with BG ratios. Thus, the BG granules did not contribute to the formation of pore structure like ChiNFs, however, they surely endowed the scaffolds with enhanced mechanical properties, improved osteogenesis bioactivity, better cytocompatibility as well as quick degradation rate. Reasonably adjusting BG ratios could balance the requirements of porous structure and bioactivity.

Research on the Wire Drawing Die Pass Parameter Calculation Based on the Least Square Algorithm

2012 ◽  
Vol 591-593 ◽  
pp. 850-853
Author(s):  
Huai Xing Wen ◽  
Yong Tao Yang
Keyword(s):  
Pore Structure ◽  
Least Squares ◽  
Least Squares Method ◽  
Piecewise Linear ◽  
Wire Drawing ◽  
Least Square ◽  
Structure Characteristics ◽  
Drawing Die ◽  
The Wire ◽  
Drawing Dies

Drawing Dies meter A / D acquisition module will be collected from the mold hole contour data to draw a curve in Matlab. According to the mold pore structure characteristics of the curve, the initial cut-off point of each part of contour is determined and iteratived optimization to find the best cut-off point, use the least squares method for fitting piecewise linear and fitting optimization to find the function of the various parts of the curve function, finally calculate the pass parameters of drawing mode. Parameters obtained compare with the standard mold, both of errors are relatively small that prove the correctness of the algorithm. Also a complete algorithm flow of pass parameters is designed, it can fast and accurately measure the wire drawing die hole parameters.

Effect of walnut shell ash on pore structure characteristics during Zhundong coal sintering

2021 ◽  
Vol 221 ◽  
pp. 106923
Author(s):  
Hao Zhou ◽  
Jiawei Luo ◽  
Zhaowen Wang ◽  
Mengting Ji ◽  
Mingrui Zhang
Keyword(s):  
Pore Structure ◽  
Walnut Shell ◽  
Structure Characteristics ◽  
Zhundong Coal

scholarly journals The role of adsorbed water on TiO2 particles in the electrorheological effect

AIP Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 105319
Author(s):  
Zhaohui Qiu ◽  
Jing Huang ◽  
Rong Shen ◽  
Ying Wang ◽  
Xiaoyi Wu ◽  
...  
Keyword(s):  
Adsorbed Water ◽  
Tio2 Particles ◽  
Electrorheological Effect
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