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首页> 外文期刊>RSC Advances >Investigation of SO2 tolerance of Ce-modified activated semi-coke based catalysts for the NO + CO reaction
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Investigation of SO2 tolerance of Ce-modified activated semi-coke based catalysts for the NO + CO reaction

机译：Ce修饰的活性半焦基催化剂对NO + CO反应的SO 2 耐受性研究

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Activated semi-coke was loaded with Fe–Co mixed oxides and doped with an optimized amount of cerium oxides. This prepared catalyst exhibited excellent NO removal (deNO) activity, and also showed outstanding SO2 resistance at 250 °C. To understand the SO2 tolerance mechanism, the catalysts were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, in situ Fourier-transform infrared spectroscopy, H2-temperature-programmed reduction, and SO2-temperature-programmed desorption, as well as CO–deNO activity testing under different conditions. The results indicate that the Ce (molar ratio = 0.1) doped onto the Fe–Co binary oxide catalysts would promote the generation of Ce2(SO4)3. This generation could prevent the active metal oxides from being poisoned by SO2. Furthermore, this kind of sulfate would weaken the interaction between SO2 and NO, so that the adsorbed NO will have a better opportunity to react with CO.
机译：活化的半焦装有Fe-Co混合氧化物，并掺有最适量的铈氧化物。所制备的催化剂表现出优异的NO去除（deNO）活性，并且在250℃下还表现出优异的耐SO 2 抗性。为了了解SO 2 的耐受机理，通过扫描电子显微镜，能量色散X射线光谱，X射线衍射，原位< / em>傅里叶变换红外光谱，H 2 -程序升温还原和SO 2 -低温程序程序设计的解吸，以及在不同条件下的CO-deNO活性测试。结果表明，掺杂在Fe-Co二元氧化物催化剂上的Ce（摩尔比= 0.1）会促进Ce 2 （SO 4 ） 3 。这一世代可以防止活性金属氧化物被SO 2 中毒。此外，这种硫酸盐会减弱SO 2 与NO之间的相互作用，从而使吸附的NO具有更好的与CO反应的机会。

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