Parametric investigation and RSM optimization of DBD plasma methods (direct & indirect) for H 2 S conversion in the air

Hydrogen sulfide (H S) is known as a harmful pollutant for the environment and human health, and its emission control is a high priority. Non-thermal plasma is an effective technology in this field. In this study, for the first time, the performance of direct and indirect H S plasma conversion metho...

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Bibliographic Details
Published in:Heliyon 2024-04, Vol.10 (8), p.e29068
Main Authors: Razavi Rad, Seyed Ali, Khani, Mohammadreza, Hatami, Hadi, Shafiee, Mojtaba, Shokri, Babak
Format: Article
Language:English
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Summary:Hydrogen sulfide (H S) is known as a harmful pollutant for the environment and human health, and its emission control is a high priority. Non-thermal plasma is an effective technology in this field. In this study, for the first time, the performance of direct and indirect H S plasma conversion methods was compared, optimized, and modeled with the CCD method. H S was diluted in zero air, and the study investigated the effect of discharge power, relative humidity, total flow rate, initial H S concentration, and their interactions. ANOVA results showed that the models for H S conversion efficiency and energy yield were significant and efficient. The direct method achieved a maximum conversion efficiency of 56 % and energy yield of 3.43 g/kWh, while the indirect method produced 68 % conversion efficiency and 1.59 g/kWh energy yield. According to the process optimization results, the direct conversion method is more optimal than the indirect conversion method due to the presence of active species and high-energy electrons in the plasma treatment, and it is a better choice if there are suitable working conditions.
ISSN:2405-8440
2405-8440