Structure and some physicochemical properties of ultrafinely divided carbon materials forming from the gas phase and plasma

1984 ◽  
Vol 23 (2) ◽  
pp. 108-110 ◽  
Author(s):  
V. F. Petrunin ◽  
V. A. Pogonin ◽  
G. I. Savvakin ◽  
V. I. Trefilov
Keyword(s):  
Physicochemical Properties ◽  
Gas Phase ◽  
Carbon Materials

scholarly journals Enhanced heterogenous hydration of SO 2 through immobilization of pyridinic-N on carbon materials

2020 ◽  
Vol 7 (8) ◽  
pp. 192248
Author(s):  
Longhua Zou ◽  
Ping Yan ◽  
Peng Lu ◽  
Dongyao Chen ◽  
Wei Chu ◽  
...  
Keyword(s):  
Gas Phase ◽  
Energy Barrier ◽  
Carbon Materials ◽  
Water Concentration ◽  
Flue Gases ◽  
Doped Graphene ◽  
Molecular Dynamics Results ◽  
Pyridinic N ◽  
Pyridinic Nitrogen

Carbon materials doped with nitrogen have long been used for SO 2 removal from flue gases for the benefits of the environment. The role of water is generally regarded as hydration of SO 3 which is formed through the oxidization of SO 2 . However, the hydration of SO 2 , especially on the surface of N-doped carbon materials, was almost ignored. In this study, the hydration of SO 2 was investigated in detail on the pyridinic nitrogen (PyN)-doped graphene (GP) surfaces. It is found that, compared with the homogeneous hydration of SO 2 assisted with NH 3 in gas phase, the heterogeneous hydration is much more thermodynamically and kinetically favourable. Specifically, when a single H 2 O molecule is involved, the energy barrier for SO 2 hydration is as low as 0.15 eV, with 0.59 eV released, indicating the hydration of SO 2 can occur at rather low water concentration and temperature. Thermodynamic integration molecular dynamics results show the feasibility of the hydrogenated substrate recovery and the immobilized N acting as a catalytic site for SO 2 hydration. Our findings show that the heterogeneous hydration of SO 2 should be universal and potentially uncover the puzzling reaction mechanism for SO 2 catalytic oxidation at low temperature by N-doped carbon materials.

Physicochemical properties and structural evolutions of gas-phase carbonization chars at high temperatures

2010 ◽  
Vol 91 (11) ◽  
pp. 1662-1669 ◽  
Author(s):  
Youqing Wu ◽  
Shiyong Wu ◽  
Sheng Huang ◽  
Jinsheng Gao
Keyword(s):  
Physicochemical Properties ◽  
Gas Phase ◽  
High Temperatures

Study of the Adsorption of Polyaromatic Hydrocarbon Binary Mixtures on Carbon Materials by Gas-Phase Fluorescence Detection

2003 ◽  
Vol 17 (3) ◽  
pp. 669-676 ◽  
Author(s):  
A. M. Mastral ◽  
T. García ◽  
R. Murillo ◽  
M. S. Callén ◽  
J. M. López ◽  
...  
Keyword(s):  
Gas Phase ◽  
Binary Mixtures ◽  
Fluorescence Detection ◽  
Carbon Materials ◽  
Polyaromatic Hydrocarbon

Relationship between physicochemical properties and electrooxidation behaviour of carbon materials

1991 ◽  
Vol 36 (13) ◽  
pp. 1931-1935 ◽  
Author(s):  
N. Giordano ◽  
P.L. Antonucci ◽  
E. Passalacqua ◽  
L. Pino ◽  
A.S. Aricò ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Carbon Materials

The effect of electrochemically polymerized pyrrole on the physicochemical properties and biological activity of carbon materials

Carbon ◽  
2012 ◽  
Vol 50 (3) ◽  
pp. 1146-1151 ◽  
Author(s):  
Mogely Sh. Khubutiya ◽  
Mark M. Goldin ◽  
Andrey A. Stepanov ◽  
Vladimir A. Kolesnikov ◽  
Sergey S. Kruglikov
Keyword(s):  
Biological Activity ◽  
Physicochemical Properties ◽  
Carbon Materials

scholarly journals Thermopolycondensation of Vacuum-Disposed Cracking Residue for Obtaining Petroleum Pitch Suitable for Production of Carbon Materials

2021 ◽  
Vol 137 (6) ◽  
pp. 16-19
Author(s):  
N. R. Mikhailets ◽  
◽  
S. A. Sinitsin ◽  
E. A. Danilov ◽  
◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Carbon Materials ◽  
Elevated Pressure ◽  
Petroleum Pitch ◽  
Reduced Pressure ◽  
Intermediate Products ◽  
The Creation ◽  
Thermal Polycondensation ◽  
Two Stages

The article emphasizes the relevance and expediency of developments for the creation of petroleum pitch and the introduction of thermal polycondensation processes in Russia. The possibility of producing petroleum pitches from vacuum-distilled cracking residue is considered. It is shown that to obtain a petroleum pitch suitable for carbon materials, it is necessary to carry out the process of thermal polycondensation in two stages: at elevated pressure, and then at reduced pressure. The physicochemical properties of the obtained petroleum pitches and intermediate products of the process have been investigated. The possibility of obtaining petroleum pitches with a yield of 35-38% wt. from the vacuum distilled cracking residue at the thermal polycondensation unit.

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