Experimental Study of Long-Term Gas Adsorption Effect on Pore Structures and Mechanical Strength Characteristics of Coal

2021 ◽  
Author(s):  
Weile Geng ◽  
Gun Huang ◽  
Shengli Guo ◽  
Changbao Jiang ◽  
Ziwen Dong ◽  
...  
Keyword(s):  
Experimental Study ◽  
Mechanical Strength ◽  
Gas Adsorption ◽  
Strength Characteristics ◽  
Adsorption Effect ◽  
Pore Structures

Influence of long-term CH4 and CO2 treatment on the pore structure and mechanical strength characteristics of Baijiao coal

Energy ◽  
2021 ◽  
pp. 122986
Author(s):  
Weile Geng ◽  
Gun Huang ◽  
Shengli Guo ◽  
Changbao Jiang ◽  
Ziwen Dong ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Pore Structure ◽  
Strength Characteristics ◽  
Co2 Treatment

scholarly journals Radon Gas Adsorption Properties of Non-Cement Matrix Using Anthracite

2018 ◽  
Vol 7 (3.34) ◽  
pp. 585
Author(s):  
Hyun Ung Lim ◽  
Su Jeong Pyeon ◽  
Sang Soo Lee
Keyword(s):  
Gas Adsorption ◽  
Adsorption Properties ◽  
Cement Matrix ◽  
Replacement Ratio ◽  
Human Environment ◽  
Adsorption Effect ◽  
Radon Gas ◽  
Long Term Measurement ◽  
Measurement Period

Background/Objectives: Recently, research on minimizing the exposure of radon in human environment is under way due to the threat of exposure to radiation, which is a problem in the world.Methods/Statistical analysis: This study is about the production of Radon Radiation Absorbing Hardeners for radon - emitting materials in indoor environment of human body. The anthracite used as a conventional filter medium was used as a radon adsorbent and the characteristics of an adsorbed cured body for the replacement ratio of anthracite were analyzed.Findings: As a result of the analysis of the experimental results, the results of the measurement of the radon gas concentration are as follows. And the adsorption effect on the half - life period of 3.8 days of radon gas was investigated. The adsorption properties of radon gas showed similar tendency irrespective of the measurement period. The longer the period, the more the concentration of radon gas was constant.Improvements/Applications: As a result of this study, the concentration of radon gas tended to decrease as the anthracite replacement ratio increased, which was not related to the duration of the measurement period of 3 days and 7 days. It is considered that the average data analysis is needed through long-term measurement of radon gas, and additional experiments are required considering the space and spatial characteristics. In addition, performance evaluation of other adsorbents is also considered necessary. 

Dependence of gas permeation and adsorption on temperature in vacuum insulation panels (VIPs) containing getter materials

2021 ◽  
pp. 174425912110171
Author(s):  
Hideya Yamamoto ◽  
Daisuke Ogura
Keyword(s):  
Glass Fiber ◽  
Adsorption Mechanism ◽  
Gas Adsorption ◽  
Gas Permeation ◽  
Fiber Core ◽  
Vacuum Insulation ◽  
Calculation Results ◽  
Long Term Performance ◽  
Term Performance

Vacuum insulation panels (VIPs) with a glass-fiber core has been considered to be difficult to operate for a long period of time, such as for building applications, because the thermal conductivity rises rapidly as the pressure increases. However, glass-fiber-core VIPs contain a material called a getter that continuously adsorbs permeated gas, and a theoretical model that considers the properties of the getter has not yet been developed. In this paper, the gas-adsorption mechanism by getters was investigated and a long-term-performance prediction model that considers the temperature dependence was proposed. Some gases were not adsorbed by the getter in the VIPs; however, a model was proposed that takes into account the non-absorbed gases by applying partial pressure to the adsorption isotherm in advance. The long-term performance of VIPs with different areas and volumes was compared with the measured values, and the validity of the calculation results was confirmed. These results show that the long-term performance of VIPs of different sizes can be accurately predicted when the getter performance is well understood.

Experimental study on the long-term stability of shale rock wellbore under high hydraulic pressure

2021 ◽  
Vol 14 (3) ◽  
Author(s):  
Baoyun Zhao ◽  
Xiaoping Wang ◽  
Wei Huang ◽  
Tianzhu Huang ◽  
Yang Liu
Keyword(s):  
Experimental Study ◽  
Hydraulic Pressure ◽  
Term Stability ◽  
Long Term Stability ◽  
Shale Rock

scholarly journals High-strength and fibrous capsule–resistant zwitterionic elastomers

2021 ◽  
Vol 7 (1) ◽  
pp. eabc5442
Author(s):  
Dianyu Dong ◽  
Caroline Tsao ◽  
Hsiang-Chieh Hung ◽  
Fanglian Yao ◽  
Chenjue Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
High Strength ◽  
Design Principles ◽  
Fibrous Capsule ◽  
High Mechanical Strength ◽  
Capsule Formation ◽  
Locking Mechanism ◽  
Fibrous Capsule Formation

The high mechanical strength and long-term resistance to the fibrous capsule formation are two major challenges for implantable materials. Unfortunately, these two distinct properties do not come together and instead compromise each other. Here, we report a unique class of materials by integrating two weak zwitterionic hydrogels into an elastomer-like high-strength pure zwitterionic hydrogel via a “swelling” and “locking” mechanism. These zwitterionic-elastomeric-networked (ZEN) hydrogels are further shown to efficaciously resist the fibrous capsule formation upon implantation in mice for up to 1 year. Such materials with both high mechanical properties and long-term fibrous capsule resistance have never been achieved before. This work not only demonstrates a class of durable and fibrous capsule–resistant materials but also provides design principles for zwitterionic elastomeric hydrogels.

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