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OALib Journal期刊
ISSN: 2333-9721
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scr脱硝过程中so2催化氧化的原位红外研究
, PP. 1018-1024
Keywords: 原位红外,选择性催化还原,v2o5-wo3/tio2,脱硝,so2催化氧化
Abstract:
？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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