| SCR脱硝过程中SO2催化氧化的原位红外研究 |
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| 引用本文： | SCR脱硝过程中SO催化氧化的原位红外研究.SCR脱硝过程中SO2催化氧化的原位红外研究[J].燃料化学学报,2015,43(8):1018-1024. |
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| 作者姓名： | SCR脱硝过程中SO催化氧化的原位红外研究 |
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| 作者单位： | 1. Electric Power Research Institute of Guangdong Power Grid Company, Guangzhou 510080, China;
2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China |
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| 基金项目： | 广东电网有限责任公司科技项目(K-GD2013-055);国家重点基础研究发展规划(973计划,2013CB228505)。 |
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| 摘 要： | 采用工业用V2O5-WO3/TiO2催化剂,基于傅里叶原位红外光谱(FT-IR)技术考察SO2的氧化过程及烟气组分对SO2氧化行为的影响;结果表明,SO2在催化剂表面氧化主要是首先吸附在催化剂表面V2O5活性位上,占据其O原子,以SO2-3形式存在,后与催化剂表面V5+-OH发生反应,生成金属硫酸盐(VOSO4)中间产物,O2重新氧化催化氧化过程中由于被SO2夺取O原子而被还原的V2O5物种,使V4+转化为V5+,促进金属硫酸盐(VOSO4)向SO3转化;SO2与NO、NH3的竞争吸附阻碍SO2在V2O5活性点位上的氧化;在SCR中,NO的脱除与SO2的氧化是相互抑制的关系。
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| 关 键 词： | 原位红外 选择性催化还原 V2O5-WO3/TiO2 脱硝 SO2催化氧化 |
| 收稿时间： | 2015-03-27 |
FT-IR study of the catalytic oxidation of SO2 during the process of selective catalytic reduction of NO with NH3 over commercial catalysts |
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| LIU Ya-ming,SHU Hang,XU Qi-sheng,ZHANG Yu-hua,YANG Lin-jun.FT-IR study of the catalytic oxidation of SO2 during the process of selective catalytic reduction of NO with NH3 over commercial catalysts[J].Journal of Fuel Chemistry and Technology,2015,43(8):1018-1024. |
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| Authors: | LIU Ya-ming SHU Hang XU Qi-sheng ZHANG Yu-hua YANG Lin-jun |
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| Abstract: | This work briefly reveals the process of catalytic oxidation of SO2 and the influences of NH3, NO and O2 on the oxidation behavior based on FT-IR.It suggests that the process of oxidation of SO2: the absorption of SO2 on V2O5 sites occupying its O atom in the form of SO2-3; reaction between absorbed SO2 and O atom in V5+-OH to form an VOSO4-like structure;reoxidation of V4+ to V5+ by O2,promoting the transformation from VOSO4-like intermediate to SO3 and V2O5. NH3 and NO competitively absorb with SO2,suppressing its oxidation behavior. The removal of NOx and the oxidation of SO2 is the relationship of mutual inhibition. |
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| Keywords: | FT-IR selective catalytic reduction V2O5-WO3/TiO2 De-NOx catalytic oxidation of SO2 |
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