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中文摘要：
利用原位漫反射傅里叶红外光谱（DRIFTS）对硝酸盐与a-Fe2O3形成的混合气溶胶与羰基硫（COS）的非均相反应进行研究，并比较了不同硝酸盐（NaNO。、KNO3和NH4NO3）和a-Fe2O3的混合物与COS反应的情况．结果表明：NaNO3质量分数为4％的混合颗粒物与COS反应具有最高的反应活性，相比纯a-Fe：O。的反应速率提高了约5倍：含等质量分数（24％）硝酸盐的混合物和纯a-FezOs对COS的转化能力依次为：a-Fe2O3/KNO3〉a-Fe2O3/NaNO3〉a-Fe2O3/NH4NO3〉a-Fe2O3而纯NaNO3、KNO3和NH4NO3颗粒与COS不发生反应．说明硝酸盐的存在很大程度上提高了COS在a-Fe2O3颗粒物表面的转化能力．
英文摘要：
The heterogeneous reaction of carbonyl sulfide （COS） on hematite particles in the presence of nitrate was investigated by in situ diffuse reflectance infrared Fourier transform spectroscopy （DRIFTS）. For sodium nitrate-containing samples, the hematite sample containing NaNO3 with mass fraction of 4% gave the highest reaction rate, which was about 5 times higher than that of hematite. For the particles containing nitrate at the same mass fraction （24%）the reactivity in descending order was a-Fe2O3/KNO3〉a-Fe2O3/NaNO3〉a-Fe2O3/NH4NO3〉a-Fe2O3 and a-Fe2O3. No uptake of COS was observed for the pure NaNO3, KNO3 and NH,NO3 samples. These results indicate that the added nitrate increased the COS conversion ability ofa-Fe2O3 particles.
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