物理化学学报 >> 2011, Vol. 27 >> Issue (10): 2275-2281.doi: 10.3866/PKU.WHXB20110912

热力学,动力学和结构化学 上一篇    下一篇

硝酸盐对羰基硫与气溶胶表面非均相反应的影响

俞彦倢, 张拴勤, 孔令东, 林立, 成天涛, 陈建民   

  1. 复旦大学环境科学与工程系, 上海 200433
  • 收稿日期:2011-05-15 修回日期:2011-06-24 发布日期:2011-09-27
  • 通讯作者: 孔令东 E-mail:ldkong@fudan.edu.cn
  • 基金资助:

    国家自然科学基金(40775079, 40875073, 40728006, 40533017)和教育部留学回国人员科研启动基金资助

Effects of Nitrates on the Heterogeneous Reaction of Carbonyl Sulfide on Model Aerosols

YU Yan-Jie, ZHANG Shuan-Qin, KONG Ling-Dong, LIN Li, CHENG Tian-Tao, CHEN Jian-Min   

  1. Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, P. R. China
  • Received:2011-05-15 Revised:2011-06-24 Published:2011-09-27
  • Contact: KONG Ling-Dong E-mail:ldkong@fudan.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (40775079, 40875073, 40728006, 40533017) and Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education, China.

摘要: 利用原位漫反射傅里叶红外光谱(DRIFTS)对硝酸盐与α-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(NaNO3、KNO3和NH4NO3)和α-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α-Fe2O3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α-Fe2O3对COS的转化能力依次为: α-Fe2O3/KNO3>α-Fe2O3/NaNO3>α-Fe2O3/NH4NO3>α-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α-Fe2O3颗粒物表面的转化能力.

关键词: 羰基硫, 气溶胶, 硝酸盐, 非均相反应

Abstract: 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 α-Fe2O3/KNO3, α-Fe2O3/NaNO3, α-Fe2O3/NH4NO3 and α-Fe2O3. No uptake of COS was observed for the pure NaNO3, KNO3 and NH4NO3 samples. These results indicate that the added nitrate increased the COS conversion ability of α-Fe2O3 particles.

Key words: Carbonyl sulfide, Aerosol, Nitrate, Heterogeneous reaction

MSC2000: 

  • O647