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Empirical method for carbonaceous substances production estimation and effect of N2 during trifluoromethane pyrolysis
- Wang, Gang, Yin, Hong, Yuan, Shenfeng, Chen, Zhirong
- Journal of analytical and applied pyrolysis 2017 v.124 pp. 89-93
- gas chromatography-mass spectrometry, pyrolysis, temperature
- A simple and effective empirical method for carbonaceous substances production estimation and the effect of diluent N2 on it during pyrolysis of trifluoromethane (R23) was firstly studied at the temperatures of 973K to 1223K and residence times of 4s to 40s. The products were identified and quantified by using GC–MS and GC-FID respectively. The production of carbonaceous substances could be expressed as Voorhies formula of Cn=Atn and the parameter n was approximately constant as 0.67, while A could be expressed with pyrolysis temperature as A=4537×exp (−1.58×104/T) through simulating the experimental data from 973K to 1173K. The production of carbonaceous substances at temperature of 1223K and residence times from 4s to 9s could be effectively predicted by using experiential formula of Cn=4537×exp (−1.58×104/T)×t0.67, while in the presence of diluent N2, it could be effectively predicted by using Voorhies formula modified with dilution ratio γ as C’n=4537×exp (−1.58×104/T−0.52×γ)×t0.67, which could be considered and used for reference in other pyrolysis process.