Characteristics of Perfluoroethane Thermal Decomposition

Chem. J. Chinese Universities

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Characteristics of Perfluoroethane Thermal Decomposition

HE Lin¹, HAN Jun^1*, WANG Guang-Hui¹, Heejoon Kim², YAO Hong³

1. Hubei Province Key Laboratory of Coal Conversion and New Materials, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Department of Ecological Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan;
3. Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2008-05-04 Revised:1900-01-01 Online:2009-01-10 Published:2009-01-10
Contact: HAN Jun

Abstract

Abstract: Perfluorocarbons(PFCs) gases have high global warming potential(GWP) and a long lifetime in the atmosphere. It is difficult to decompose these gases due to their tetrahedral structure arising from strong C—F bonds. This paper discussed C₂F₆(one of PFCs gases) thermal decomposition characteristic under 950—1100 ℃ in a laboratory scale reactor. The effects of C₂F₆ initial concentration, reaction temperature, residence time on C₂F₆ decomposition ratio were also investigated. The experimental results indicate that the lower initial C₂F₆ concentration, higher reaction temperature, longer residence time can promote C₂F₆ decomposition ratio. On the basis of the results, it can be drawn that the reaction order of C₂F₆ thermal decomposition is between 0 and 1. Above 90% C₂F₆ decomposition ratio can be achieved under a temperature of 1100 ℃, 223.21 μmol/L initial C₂F₆ concentration and 2 s residence time. Basis on the calculation, the activation energy(E_a) and the frequency factor(A) of C₂F₆ thermal decomposition in the temperature range of 950—1100 ℃ were 313.2 kJ/mol and 8.8×1011 s^-1, respectively.

Key words: C₂F₆, Characteristic, Thermal decomposition

CLC Number:

O642

TrendMD:

HE Lin¹, HAN Jun^1*, WANG Guang-Hui¹, Heejoon Kim², YAO Hong³. Characteristics of Perfluoroethane Thermal Decomposition[J]. Chem. J. Chinese Universities, doi: .

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Characteristics of Perfluoroethane Thermal Decomposition

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