Study on Reaction Mechanism during the Pyrolysis of Coal to Acetylene in the Plasma

2013 ◽  
Vol 634-638 ◽  
pp. 1637-1642 ◽  
Author(s):  
Yuan Yu Tian ◽  
Ying Yun Qiao ◽  
Ke Chang Xie
Keyword(s):  
Free Radicals ◽  
High Temperature ◽  
Free Radical ◽  
Reaction Mechanism ◽  
Radical Reaction ◽  
Free Radical Reaction ◽  
Temperature Plasma ◽  
Organic Product ◽  
Plasma Reaction ◽  
Chemical Groups

The pyrolysis of coal to acetylene is studied with Pingshuo coal, Zichang coal and Dongshan coal in the plasma, and its course is analysised by coal chemical groups. The reaction mechanism of imitate free radicals is proposed in the pyrolysis of coal to acetylene in the plasma, the free radicals formation of high-temperature plasma and the composite dynamics are discussed. The results can educe that the acetylene content is higher of the organic product in the high temperature center zone of the pyrolysis of coal to acetylene in the plasma which base on the discussion of the saturates free radicals generating and compounding, combine with the reaction of aromatics, colloids and asphaltene and carbenes. It also can indicate that free radical reaction mechanism is applicable and feasible to explain coal of high-temperature centre zone in the plasma reaction.

scholarly journals A Study of the Mechanisms of Guaiacol Pyrolysis Based on Free Radicals Detection Technology

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 295 ◽  
Author(s):  
Guoxiang Li ◽  
Zhongyang Luo ◽  
Wenbo Wang ◽  
Jianmeng Cen
Keyword(s):  
Free Radicals ◽  
Free Radical ◽  
Radical Reaction ◽  
Free Radical Reaction ◽  
Methyl Radicals ◽  
Paramagnetic Resonance ◽  
Lignin Model Compound ◽  
Detection Technology ◽  
Lignin Model ◽  
Hydrogen Radicals

In order to understand the reaction mechanism of lignin pyrolysis, the pyrolysis process of guaiacol (o-methoxyphenol) as a lignin model compound was studied by free radical detection technology (electron paramagnetic resonance, EPR) in this paper. It was proven that the pyrolysis reaction of guaiacol is a free radical reaction, and the free radicals which can be detected mainly by EPR are methyl radicals. This paper proposes a process in which four free radicals (radicals 1- C6H4(OH)O*, radicals 5- C6H4(OCH3)O*, methyl radicals, and hydrogen radicals) are continuously rearranged during the pyrolysis of guaiacol.

Free radical reaction mechanism on improving tar yield and quality derived from lignite after hydrothermal treatment

Fuel ◽  
2017 ◽  
Vol 207 ◽  
pp. 244-252 ◽  
Author(s):  
Peng Liu ◽  
Jiawei Le ◽  
Dexiang Zhang ◽  
Shengchun Wang ◽  
Tieying Pan
Keyword(s):  
Free Radical ◽  
Reaction Mechanism ◽  
Hydrothermal Treatment ◽  
Radical Reaction ◽  
Free Radical Reaction ◽  
Yield And Quality

Mechanism for the Formation of Elemental Sulfur from Modified Stretford Process

2011 ◽  
Vol 233-235 ◽  
pp. 892-896 ◽  
Author(s):  
Yue Dong ◽  
Kai Cheng Ling ◽  
Wei Shuai Zhang ◽  
Hua Feng Luo
Keyword(s):  
Cyclic Voltammetry ◽  
Free Radical ◽  
Reaction Mechanism ◽  
Intermediate Product ◽  
Elemental Sulfur ◽  
Radical Reaction ◽  
Free Radical Reaction ◽  
Reactive Intermediate

In this paper, the mechanism for the formation of elemental sulfur from the modified Stretford process was investigated using cyclic voltammetry (CV). The results showed that hydrosulfide (HS-) is first oxidized to produce polysulfide ion (Sx2-) which is reactive intermediate product and will further transform to form elemental sulfur S8. Additionally, a free radical reaction mechanism which describes the formation of elemental sulfur S8 was proposed.

Kinetics of the Production of Castor Oil Maleate through the Autocatalyzed Thermal Reaction and the Free Radical Reaction

2017 ◽  
Vol 50 (2) ◽  
pp. 112-121 ◽  
Author(s):  
Dayanne L. H. Maia ◽  
Elenilson G. Alves Filho ◽  
Antonino F. Barros Junior ◽  
Fabiano A. N. Fernandes
Keyword(s):  
Free Radical ◽  
Castor Oil ◽  
Radical Reaction ◽  
Thermal Reaction ◽  
Free Radical Reaction ◽  
Kinetics Of
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