scholarly journals Oxygen adsorption and CO desorption behavior of B- and N-doped vacancy defected nuclear graphite by DFT study

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3257-3264 ◽  
Author(s):  
Juan Liu ◽  
Tongxiang Liang ◽  
Chen Wang ◽  
Wenzheng Lai
Keyword(s):  
Oxidation Behavior ◽  
Oxygen Adsorption ◽  
Dft Study ◽  
Adsorption And Desorption ◽  
Graphite Oxidation ◽  
Nuclear Graphite ◽  
Two Factors ◽  
Gasification Products

Oxygen adsorption and desorption of gasification products are two factors that influence graphite oxidation behavior.

Adsorption and Desorption of Tritium in Nuclear Graphite at 700°C: A Gas Chromatographic Study Using Hydrogen

2019 ◽  
Vol 205 (9) ◽  
pp. 1143-1153 ◽  
Author(s):  
Ke Deng ◽  
Mingjun Zhang ◽  
Xijun Wu ◽  
Qin Zhang ◽  
Guo Yang ◽  
...  
Keyword(s):  
Chromatographic Study ◽  
Adsorption And Desorption ◽  
Nuclear Graphite

scholarly journals Oxidation Behavior of Matrix Graphite and Its Effect on Compressive Strength

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Xiangwen Zhou ◽  
Cristian I. Contescu ◽  
Xi Zhao ◽  
Zhenming Lu ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Pore Formation ◽  
Oxidation Behavior ◽  
Mercury Porosimetry ◽  
Strength Loss ◽  
Nuclear Graphite ◽  
Matrix Graphite ◽  
Oxidation Performance ◽  
Lower Oxidation ◽  
High Temperature Gas

Matrix graphite (MG) with incompletely graphitized binder used in high-temperature gas-cooled reactors (HTGRs) is commonly suspected to exhibit lower oxidation resistance in air. In order to reveal the oxidation performance, the oxidation behavior of newly developed A3-3 MG at the temperature range from 500 to 950°C in air was studied and the effect of oxidation on the compressive strength of oxidized MG specimens was characterized. Results show that temperature has a significant influence on the oxidation behavior of MG. The transition temperature between Regimes I and II is ~700°C and the activation energy (Ea) in Regime I is around 185 kJ/mol, a little lower than that of nuclear graphite, which indicates MG is more vulnerable to oxidation. Oxidation at 550°C causes more damage to compressive strength of MG than oxidation at 900°C. Comparing with the strength of pristine MG specimens, the rate of compressive strength loss is 77.3% after oxidation at 550°C and only 12.5% for oxidation at 900°C. Microstructure images of SEM and porosity measurement by Mercury Porosimetry indicate that the significant compressive strength loss of MG oxidized at 550°C may be attributed to both the uniform pore formation throughout the bulk and the preferential oxidation of the binder.

DFT Study of Oxygen Adsorption on Modified Nanostructured Gold Pyramids

2005 ◽  
Vol 109 (16) ◽  
pp. 7624-7630 ◽  
Author(s):  
F. Tielens ◽  
J. Andrés ◽  
M. Van Brussel ◽  
C. Buess-Hermann ◽  
P. Geerlings
Keyword(s):  
Oxygen Adsorption ◽  
Dft Study ◽  
Nanostructured Gold

Tritium adsorption and desorption on/from nuclear graphite edge by a first-principles study

Carbon ◽  
2021 ◽  
Vol 173 ◽  
pp. 676-686
Author(s):  
Mingjun Zhang ◽  
Xijun Wu ◽  
Guo Yang ◽  
Nan Qian ◽  
Fei Wei ◽  
...  
Keyword(s):  
First Principles ◽  
Adsorption And Desorption ◽  
First Principles Study ◽  
Nuclear Graphite

DFT study of oxygen adsorption on W(112) surface

2005 ◽  
Vol 577 (2-3) ◽  
pp. 229-235 ◽  
Author(s):  
I.N. Yakovkin
Keyword(s):  
Oxygen Adsorption ◽  
Dft Study
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