Evaluation of SO₂ removal efficiency using a series non-thermal plasma reactor coupled with TiO₂ and ZnO photocatalysts
Year: 2025
Type: article
Abstract: SO2 is one of the major air pollutants affecting both the environment and human health. Controlling its emissions has become a critical goal for many countries. Various technologies exist for SO2 removal, among which non-thermal plasma systems combined with photocatalysts stand out as particularly effective. This study evaluates the performance of a combined system utilizing non-thermal plasma and photocatalysts for SO2 removal, with data analyzed through SPSS and R software. In this method, SO2 was diluted with dry air and nano-photocatalysts of TiO2 and ZnO were used in IPC form to remove the pollutant. The study examined the effects of multiple variables – including concentration, flow rate, voltage, specific input energy, and residence time – on removal efficiency, as well as their interactions. ANOVA results showed that both systems were highly effective at removing SO2, though the non-thermal plasma system paired with TiO2 photocatalyst performed slightly better. At a concentration of 500 ppm, SO2 removal efficiency reached 97.32% in the TiO2-based system and 94.3% in the ZnO-based one. The best efficiency for both methods was achieved at a voltage of 15 kV and a flow rate of 3 Lit/Min. Results revealed this approach highly effective, efficient, and cost-effective for SO2 removal.
Source: Scientific Reports
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W4413862701