[Simultaneous desulfurization and denitrification by TiO2/ACF under different irradiation]

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Flue gas treatment is critical for reducing industrial pollution.
• Simultaneous desulfurization and denitrification (SND) presents a significant environmental challenge.
• Photocatalysis offers a promising approach for pollutant removal.

Purpose of the Study:

• To prepare supported TiO2 photocatalysts for simultaneous desulfurization and denitrification.
• To investigate the optimal experimental conditions for the photocatalytic process.
• To compare the efficiencies of TiO2/ACF under UV and visible light irradiation.

Main Methods:

• Laboratory preparation of supported TiO2 photocatalysts.
• Design and utilization of a custom photocatalysis reactor.
• Experimental optimization of flue gas parameters (oxygen content, temperature, humidity, irradiation intensity).
• Comparative analysis of pollutant removal under UV and visible light.

Main Results:

• Optimal conditions were identified for simultaneous SO2 and NO removal.
• TiO2/ACF achieved 99.7% SO2 and 64.3% NO removal under UV light.
• TiO2/ACF achieved 97.5% SO2 and 49.6% NO removal under visible light.
• Key factors influencing efficiency include oxygen content, temperature, humidity, and irradiation intensity.
• Low standard deviation in parallel experiments confirmed reproducibility.

Conclusions:

• Supported TiO2 photocatalysts are effective for simultaneous SO2 and NO removal.
• UV irradiation yields higher removal efficiencies compared to visible light.
• Flue gas composition and reaction conditions significantly impact photocatalytic performance.
• The study proposes a removal mechanism based on ion chromatography analysis.