Abstract Simultaneous removal of SO2, NOx and Hg0 using O3 and corn stalk bio-charcoal (CR)/coconut shell activated carbon (CS) was compared in a fixed bed. The effects of temperature, adsorption time and ratio of O3/NO on the removal efficiency of NO, Hg0 and SO2 by CR/CS were studied, and the CR and CS was characterized and analyzed. The results indicated that the oxidation rate of NO and Hg0 increased with the increase of O3/NO ratio, while the oxidation rate of SO2 first increased and then decreased slightly. The increase of temperature inhibits the oxidation of NO but promotes the oxidation of Hg0 and SO2. At 140°C and O3/NO ratio was 1.4, the oxidation rate of NO, Hg0 and SO2 is 99%, 78.6% and 3.5%, respectively. As O3/NO ratio increased from 0.4 to 1.4, the removal efficiency of CR for NOx increased from 4.6% to 93%, and CS increases from 4.5% to 79%. CR and CS can reduce part of NO2 and increase NO concentration at the outlet. NOx adsorption performance on CR is relatively better, while those of Hg0 and SO2 on CS are relatively stronger. CS has stronger physical adsorption capacity than CR. The relative content of oxygen-containing functional groups C-O and C=O on the surface of CR is higher than that of CS, while its relative content of COOH and O=C-O is lower.

中文翻译：

---

O3氧化结合生物炭吸附同时去除SO2、NO和Hg0

摘要 在固定床中比较了O3和玉米秸秆生物炭（CR）/椰壳活性炭（CS）同时去除SO2、NOx和Hg0的情况。研究了温度、吸附时间和O3/NO比对CR/CS去除NO、Hg0和SO2效率的影响，并对CR和CS进行了表征和分析。结果表明，NO和Hg0的氧化率随着O3/NO比值的增加而增加，而SO2的氧化率则先增加后略有下降。温度的升高抑制了 NO 的氧化，但促进了 Hg0 和 SO2 的氧化。在140℃和O3/NO比为1.4时，NO、Hg0和SO2的氧化率分别为99%、78.6%和3.5%。随着 O3/NO 比从 0.4 增加到 1.4，CR 对 NOx 的去除效率从 4.6% 增加到 93%，CS 从 4 增加。5% 到 79%。CR和CS可以减少部分NO2，增加出口NO浓度。NOx对CR的吸附性能相对较好，而Hg0和SO2对CS的吸附性能相对较强。CS比CR具有更强的物理吸附能力。CR表面含氧官能团CO和C=O的相对含量高于CS，而其COOH和O=CO的相对含量较低。