Progress on the mechanistic understanding of SO2 oxidation catalysts
Progress on the mechanistic understanding of SO2 oxidation catalysts
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DOI：
10.1016/s0920-5861(99)00034-6
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发表时间：
1999-07
期刊：
影响因子：
5.3
通讯作者：
O. Lapina;B. Bal’zhinimaev;S. Boghosian;K. M. Eriksen;R. Fehrmann
中科院分区：
文献类型：
--
作者：
O. Lapina;B. Bal’zhinimaev;S. Boghosian;K. M. Eriksen;R. Fehrmann
几乎世纪以来，钒氧化物基催化剂一直是硫酸生产工业过程中的主要材料。院士[G.K. Boreskov，硫酸生产中的催化，Goskhimizdat（俄文），莫斯科，1954年，第348页]。近年来，这些催化剂也被用于清洁烟道气和其他含SO− 2的工业废气。尽管这些工业过程的重要性和长期使用，催化活性物种和反应机理一直是几乎未知的，直到最近几年。现在认识到，在400-600°C下，工作催化剂由熔融盐/气体系统M2 S2 O 7-MHSO 4-V2 O 5/SO2-O2-SO 3-H2O-CO2-N2（M=Na，K，Cs）很好地描述，并且钒络合物在催化反应机理中起关键作用。联合收割机的努力，从四个不同的国家的四个小组已经进行了多仪器的调查模型系统，以及对工作的工业催化剂。详细的信息已经获得了复杂的氧化还原化学钒。在此基础上，对反应机理有了更深入的认识。
For almost a century vanadium oxide based catalysts have been the dominant materials in industrial processes for sulfuric acid production. A vast body of information leading to fundamental knowledge on the catalytic process was obtained by Academician [G.K. Boreskov, Catalysis in Sulphuric Acid Production, Goskhimizdat (in Russian), Moscow, 1954, p. 348]. In recent years these catalysts have also been used to clean flue gases and other SO−2containing industrial off-gases. In spite of the importance and long utilization of these industrial processes, the catalytic active species and the reaction mechanism have been virtually unknown until recent years. It is now recognized that the working catalyst is well described by the molten salt/gas system M2S2O7–MHSO4–V2O5/SO2–O2–SO3–H2O–CO2–N2(M=Na, K, Cs) at 400–600°C and that vanadium complexes play a key role in the catalytic reaction mechanism. A multiinstrumental investigation that combine the efforts of four groups from four different countries has been carried out on the model system as well as on working industrial catalysts. Detailed information has been obtained on the complex and on the redox chemistry of vanadium. Based on this, a deeper understanding of the reaction mechanism has been achieved.