Crystalline Nanochannels with Pendant Azobenzene Groups: Steric or Polar Effects on Gas Adsorption and Diffusion?

2017 ◽  
Vol 139 (26) ◽  
pp. 8784-8787 ◽  
Author(s):  
Hubiao Huang ◽  
Hiroshi Sato ◽  
Takuzo Aida
Keyword(s):  
Gas Adsorption ◽  
And Diffusion ◽  
Azobenzene Groups

scholarly journals Molecular Simulation of Shale Gas Adsorption and Diffusion in Clay Nanopores

Computation ◽  
2015 ◽  
Vol 3 (4) ◽  
pp. 687-700 ◽  
Author(s):  
Hongguang Sui ◽  
Jun Yao ◽  
Lei Zhang
Keyword(s):  
Molecular Simulation ◽  
Shale Gas ◽  
Gas Adsorption ◽  
And Diffusion

Molecular simulation of gas adsorption characteristics and diffusion in micropores of lignite

Fuel ◽  
2020 ◽  
Vol 269 ◽  
pp. 117443 ◽  
Author(s):  
Dameng Gao ◽  
Lin Hong ◽  
Jiren Wang ◽  
Dan Zheng
Keyword(s):  
Molecular Simulation ◽  
Gas Adsorption ◽  
Adsorption Characteristics ◽  
And Diffusion

Effect of an electrostatic field on gas adsorption and diffusion in tectonic coal

2015 ◽  
Vol 25 (4) ◽  
pp. 607-613 ◽  
Author(s):  
Kuo Jian ◽  
Dongji Lei ◽  
Xuehai Fu ◽  
Yugui Zhang ◽  
Hengle Li
Keyword(s):  
Electrostatic Field ◽  
Gas Adsorption ◽  
Tectonic Coal ◽  
And Diffusion

Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix

2018 ◽  
Vol 28 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Hui Wang ◽  
Zhiguo Qu ◽  
Ying Yin ◽  
Junqiang Bai ◽  
Bo Yu
Keyword(s):  
Molecular Simulation ◽  
Gas Adsorption ◽  
Simulation Method ◽  
Adsorption Desorption ◽  
And Diffusion

Molecular simulation of shale gas adsorption and diffusion in inorganic nanopores

2014 ◽  
Vol 41 (5-6) ◽  
pp. 414-422 ◽  
Author(s):  
Aman Sharma ◽  
Sadanandam Namsani ◽  
Jayant K. Singh
Keyword(s):  
Molecular Simulation ◽  
Shale Gas ◽  
Gas Adsorption ◽  
And Diffusion

scholarly journals Tuning Gas Adsorption Selectivity and Diffusion Rates in Zeolites with Phosphonic Acid Monolayers

2020 ◽  
Vol 1 (4) ◽  
pp. 100036
Author(s):  
Lucas D. Ellis ◽  
Surya T. Parker ◽  
Jeremy Hu ◽  
Sarah F. Zaccarine ◽  
Michael J. Stellato ◽  
...  
Keyword(s):  
Phosphonic Acid ◽  
Gas Adsorption ◽  
Adsorption Selectivity ◽  
Diffusion Rates ◽  
And Diffusion

scholarly journals Effect of Mechanical Vibration with Different Frequencies on Pore Structure and Fractal Characteristics in Lean Coal

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Maoliang Shen ◽  
Xuexi Chen ◽  
Yong Xu
Keyword(s):  
Coalbed Methane ◽  
Gas Adsorption ◽  
Mechanical Vibration ◽  
Total Pore Volume ◽  
Nitrogen Adsorption ◽  
Gas Diffusion ◽  
Microscopic Mechanism ◽  
Fractal Characteristics ◽  
And Diffusion ◽  
Nitrogen Adsorption Data

The mechanical vibrations caused by underground operations can easily lead to coal and gas outbursts in coal mines. Using the MVGAD-I experimental platform that we designed, the raw coal (0 Hz) was treated with vibration frequencies of 25, 50, 75, and 100 Hz, and the coal samples with different frequency vibrations were obtained. The total pore volume (TPV), specific surface area (SSA), pore size distribution, and the pore fractal dimension (PFD) of five coal samples were analyzed by mercury intrusion porosimetry and low-pressure nitrogen adsorption data. We found that the TPV, SSA, and PFD of the coal samples fluctuate with the increase of vibration frequency. The changes of the TPV and SSA of coal samples treated with 25 and 75 Hz vibrations were significantly greater than those subjected to vibrations of 50 and 100 Hz. Compared with the raw coal (0 Hz), the TPV and SSA of macropores, mesopores, and micropores increased the most in 75 Hz vibration coal sample. Therefore, the 75 Hz vibration excitation can improve the permeability of a body of coal mass and is conducive to the diffusion and seepage of coalbed methane and its production.. The influence of 25 Hz vibration on the TPV and SSA of macropores and mesopores is not obvious, but the TPV and SSA of minipores and micropores decrease significantly, which is not conducive to gas diffusion and adsorption. In addition, 25 and 75 Hz vibrations obviously damaged the fractal characteristics of both mesopores and micropores, resulting in the change of gas adsorption and diffusion ability. The rational use of a 75 Hz vibration is beneficial to both the production of gas and the prevention of outbursts, while a 25 Hz vibration should be avoided. The results are expected to reveal the microscopic mechanism of a vibration-induced outburst and provide theoretical guidance for employing the appropriate frequency of vibration to improve the rate of gas drainage and reduce the risk of outbursts.

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