Dielectric and gas adsorption/desorption properties of x-Li(Pc) having one-dimensional channels surrounded by Pc˙− columns

CrystEngComm ◽  
2020 ◽  
Vol 22 (44) ◽  
pp. 7528-7531
Author(s):  
Miki Nishi ◽  
Norihisa Hoshino ◽  
Shin-ichiro Noro ◽  
Hitoshi Fujimoto ◽  
Tomoyuki Akutagawa ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Channel System ◽  
One Dimensional ◽  
Adsorption Desorption

A one-dimensional channel system x-Li(Pc), composed of π-radical Pc˙−, was investigated. It was revealed that this channel surrounded by Li(Pc) columns is flexible, and gas adsorption/desorption measurements showed selective properties.

scholarly journals Laser THz Emission Spectroscopy of Gas Adsorption-Desorption Dynamics in Tungsten Disulfide Nanosheets

2016 ◽  
Vol 14 (0) ◽  
pp. 78-82 ◽  
Author(s):  
Filchito Renee Bagsican ◽  
Iwao Kawayama ◽  
Hironaru Murakami ◽  
Masayoshi Tonouchi ◽  
Andrew Winchester ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Gas Adsorption ◽  
Tungsten Disulfide ◽  
Adsorption Desorption

A Reduced Fuel Cell Stack Model for Control and Fault Diagnosis

2006 ◽  
Vol 3 (4) ◽  
pp. 384-388 ◽  
Author(s):  
Damiano Di Penta ◽  
Karim Bencherif ◽  
Michel Sorine ◽  
Qinghua Zhang
Keyword(s):  
Fuel Cell ◽  
Fault Diagnosis ◽  
Gas Adsorption ◽  
Carbon Monoxide Poisoning ◽  
Important Indicator ◽  
Fuel Cell Stack ◽  
Electrode Potentials ◽  
The Difference ◽  
Adsorption Desorption ◽  
Stack Model

This paper proposes a reduced fuel cell stack model for control and fault diagnosis which was validated with experimental data. Firstly, the electro-chemical phenomena are modeled based on a mechanism of gas adsorption/desorption on catalysts at the anode and at the cathode of the stack, including activation, diffusion, and carbon monoxide poisoning. The electrical voltage of a stack cell is then modeled by the difference between the two electrode potentials. A simplified thermal model of the fuel cell stack is also developed in order to take into account heat generation from reactions, heat transfers, and evaporation/condensation of water. Finally, the efficiency ratio is computed as a model output. It is used to evaluate the efficiency changes of the entire system, providing an important indicator for fault detection.

scholarly journals Chemo-mechanical coupling in kerogen gas adsorption/desorption

2018 ◽  
Vol 20 (18) ◽  
pp. 12390-12395 ◽  
Author(s):  
Tuan Anh Ho ◽  
Yifeng Wang ◽  
Louise J. Criscenti
Keyword(s):  
Molecular Dynamics ◽  
Monte Carlo ◽  
Molecular Dynamics Simulation ◽  
Simulation Study ◽  
Gas Adsorption ◽  
Dynamics Simulation ◽  
Hybrid Monte Carlo ◽  
Mechanical Coupling ◽  
Adsorption Desorption

Strong chemo-mechanical coupling in kerogen gas adsorption from a hybrid Monte Carlo/molecular dynamics simulation study.

scholarly journals Experimental research on desorption characteristics of gas-bearing coal subjected to mechanical vibration

2020 ◽  
Vol 38 (5) ◽  
pp. 1454-1466
Author(s):  
Xuexi Chen ◽  
Liang Zhang ◽  
Maoliang Shen
Keyword(s):  
Coalbed Methane ◽  
Gas Adsorption ◽  
Mechanical Vibration ◽  
Particle Diameter ◽  
Reference Value ◽  
Desorption Rate ◽  
Gas Desorption ◽  
Adsorbed Gas ◽  
Vibration Parameters ◽  
Adsorption Desorption

Mechanical vibration can induce coal and gas outburst accidents, and can also promote the exploitation of coalbed methane. In this paper, a vibration-adsorption-desorption experiment system was established, the effects of coal sample particle diameter, gas pressure, and vibration frequency on gas desorption were studied. Mechanical vibration can generate a shear force in the adsorbed gas and promote gas desorption, but there are appropriate vibration parameters. Within the range of experimental parameters, the larger the amplitude, the more favorable for gas desorption. The change rules of gas desorption rate and desorption quantity under different conditions are basically the same, showing a power function shape with time increase, and most of the desorption quantity was completed within the first 5 minutes. The gas desorption rate and desorption quantity were positively related to the gas adsorption pressure. The results have great reference value for preventing gas outbursts and promoting gas exploitation.

scholarly journals Coal Anisotropic Sorption and Permeability: An Experimental Study

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 104 ◽  
Author(s):  
Yulong Chen ◽  
Xuelong Li ◽  
Bo Li
Keyword(s):  
Experimental Study ◽  
Gas Adsorption ◽  
Great Influence ◽  
Flow Characteristics ◽  
Volumetric Strain ◽  
Bedding Plane ◽  
Gas Production ◽  
Desorption Process ◽  
Bedding Angle ◽  
Adsorption Desorption

Knowledge of the bedding plane properties of coal seams is essential for the coalbed gas production because of their great influence on the inner flow characteristics and sorption features of gas and water. In this study, an experimental study on the anisotropic gas adsorption–desorption and permeability of coal is presented. The results show that during the adsorption–desorption process, an increase in the bedding plane angle of the specimen expands the length and area of the contact surface, thereby increasing the speed and quantity of adsorption and desorption. With an increase in the bedding angle, the number of pores and cracks was found to increase together with the volumetric strain. The evolution of permeability of coal heavily depended on stress–strain stages. The permeability decreased with the increase of stress at the initial compaction and elastic deformation stages, while it increased with the increase of stress at the stages of strain-hardening, softening and residual strength. Initial permeability increased with increasing bedding angle.

Adsorption, desorption, and diffusion ofk-mers on a one-dimensional lattice

2009 ◽  
Vol 80 (2) ◽  
Author(s):  
I. Lončarević ◽  
Lj. Budinski-Petković ◽  
S. B. Vrhovac ◽  
A. Belić
Keyword(s):  
Dimensional Lattice ◽  
One Dimensional ◽  
Adsorption Desorption ◽  
And Diffusion

Inclusion compounds of thiourea and peralkylated ammonium salts. III. Hydrogen-bonded host lattices built of thiourea and nitrate ions

1996 ◽  
Vol 52 (6) ◽  
pp. 989-998 ◽  
Author(s):  
Q. Li ◽  
T. C. W. Mak
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Channel System ◽  
Nitrate Ion ◽  
Space Group ◽  
One Dimensional ◽  
X Ray Crystallography ◽  
Packing Arrangement ◽  
Host Lattices ◽  
Hydrogen Bonded

The new inclusion complexes tetraethylammonium nitrate–thiourea (1:3), (C2H5)4N+.NO3 −. 3(NH2)2CS (1), tetra-n-propylammonium nitrate–thiourea–water (1:3:1), (n-C3H7)4N+.NO3 −.3(NH2)2CS.H2O (2), tetramethylammonium nitrate–thiourea (1:1), (CH3)4N+.NO3 −.(NH2)2CS (3), tetra-n-propylammonium nitrate–thiourea (1:1), (n-C3H7)4N+.NO3 −. (NH2)2CS (4), and tetra-n-butylammonium nitrate–thiourea (1:1), (n-C4H9)4N+.NO3 −.(NH2)2CS (5) have been prepared and characterized by X-ray crystallography. Crystal data, Mo Kα: (1), space group P{\bar 1}, a = 10.300 (2), b = 14.704 (3), c = 15.784 (4) Å, α = 75.30 (3), β = 86.98 (3), γ = 72.25 (3)°, Z = 4 and RF = 0.039 for 5034 observed data; (2), space group P21/n, a = 8.433 (2), b = 9.369 (2), c = 34.361 (7) Å, β = 91.01 (3)°, Z = 4 and RF = 0.050 for 2475 observed data; (3), space group Pnma, a = 15.720 (3), b = 8.218 (2), c = 8.709 (2) Å, Z = 4 and RF = 0.073 for 579 observed data; (4), space group P21/n, a = 8.784 (2), b = 14.421 (3), c = 15.078 (3) Å, β = 92.31 (3)°, Z = 4 and RF = 0.046 for 2507 observed data; (5), space group Pna21, a = 19.934 (3), b = 12.680 (2), c = 9.092 (3) Å, Z = 4 and RF = 0.047 for 1646 observed data. In the crystal structure of (1) infinite chains each composed of an alternate arrangement of a twisted thiourea trimer and a nitrate ion are cross-linked to form a puckered layer and further hydrogen bonding between such layers leads to a channel host framework for accommodation of the cationic guests. In the crystal structure of (2) two independent thiourea molecules are used to construct a hydrogen-bonded puckered layer normal to the c axis, whereas the remaining thiourea molecule, together with the nitrate ion and water molecule, generate another puckered layer that is parallel to the first. Hydrogen bonding between these two types of layers gives rise to a channel system running parallel to the [100] direction and the cations are stacked regularly within each column. Compounds (3), (4) and (5) have closely related crystal structures in which the cations are separated by one-dimensional, infinitely extended thiourea–nitrate composite ribbons in a sandwich-like packing arrangement.

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