1. Experimental and kinetic modeling study of tar partial oxidative reforming by dielectric barrier discharge plasma using toluene as a model compound.
- Author
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Xu, Bin, Xie, Jianjun, Liu, Huacai, Yang, Wenshen, Yin, Xiuli, and Wu, Chuangzhi
- Subjects
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PLASMA flow , *TOLUENE , *GAS purification , *TAR , *PARTIAL oxidation , *STEAM reforming - Abstract
• Plasma partial oxidative reforming of the tar model compound was carried out. • A detailed kinetics model was established based on the calculated G-values of active species. • Performance was evaluated under pure N 2 and gasification gas atmospheres. • The highest toluene conversion was 100.0 % with an energy efficiency of 25.7 g/kWh, without catalysts usage. In this study, partial oxidation of toluene as a biomass tar surrogate was carried out in a dielectric barrier discharge (DBD) plasma reactor. In order to understand the reaction characteristics and thus potential of the approach, the effect of reaction temperature, O 2 /toluene molar ratio (OTR) and discharge power on performances was investigated by experiments and kinetic modeling. The results showed that the three factors could change the E/n and hence the G-values of species, as well as alter O 2 concentration in background gas and input energy, leading to the variation in active species production and thus, the performance. Appropriate high temperatures, as well as higher OTRs and discharge power obtained better performances by promoting toluene destruction and gas product production. Excited N 2 species play a crucial role in the process, by means of participating in reactions directly and strongly influencing on the production of secondary active species. At 300 °C, the highest toluene conversion of 100.0 % with an energy efficiency of 25.7 g/kWh was achieved without catalysts usage, a comparable performance as compared to the steam reforming by plasma catalysis, demonstrating the potential of this method for the purification of gasification gases. Furthermore, based on the rate of production (ROP) and sensitivity analyses of the model developed, as well as experimental results, the reaction mechanism was proposed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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