Background :This study aimed to establish novel photothermal catalysts suitable for the reaction at temperatures of 100-200 ℃ to develop an innovative Hg0 and NO simultaneous removal technology in a lower temperature environment. To further explore the stability and sulfur resistance of 7%CeO₂/TiO₂ and 5%CuO/TiO₂, the oxidation efficiency and reaction mechanisms of Hg⁰ were investigated in multi-pollutant environments at low temperatures. Methods: TiO₂, CeO₂/TiO₂, and CuO/TiO₂ used to oxidize Hg⁰ at low temperatures were prepared by the sol-gel method, which were localized to glass beads for each test. A self-designed photothermal catalytic reaction system consisted of a mercury generator, a mixing chamber, a catalytical reactor, and an m on-line mercury measuring instrument. Significant Findings: The oxidation efficiencies of Hg⁰ for different reaction temperatures were ordered as η_100℃>η_150℃>η_200℃ in the atmosphere of N₂+Hg⁰. In the atmosphere of N₂+Hg⁰+NO, low concentration of NO (<300 ppm) exhibited inhibitive effect to Hg⁰ oxidation, while high concentration of NO (>300 ppm) enhanced Hg⁰ oxidation. In the atmosphere of N₂+Hg⁰+SO₂, SO₂ could occupy the active sites for Hg⁰ oxidation and inhibited the oxidation of Hg⁰.

背景：本研究旨在建立适用于 100-200 ℃ 反应的新型光热催化剂，以开发在较低温度环境下同时去除 Hg0 和 NO 的创新技术。为了进一步探索7%CeO ₂ /TiO ₂和5%CuO/TiO ₂的稳定性和抗硫性，研究了低温下多污染物环境中Hg ⁰的氧化效率和反应机理。方法：TiO ₂、CeO ₂ /TiO ₂和CuO/TiO ₂用于氧化Hg ⁰在低温下通过溶胶-凝胶方法制备，每次测试都将其定位在玻璃珠上。自行设计的光热催化反应系统由汞发生器、混合室、催化反应器和m在线测汞仪组成。重要发现：在N ₂ +Hg ⁰气氛中，Hg ⁰对不同反应温度的氧化效率顺序为η _100℃ >η _150℃ >η _200℃。在N ₂ +Hg ⁰ +NO气氛中，低浓度NO（<300 ppm）对Hg ⁰氧化有抑制作用，而高浓度NO（>300 ppm）对Hg ⁰氧化有促进作用。⁰氧化。于N的气氛₂ +汞柱⁰ + SO ₂，SO ₂可占据汞活性位点⁰的氧化和抑制汞的氧化⁰。