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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (9): 1327-1333    DOI: 10.1631/jzus.A0820787
Energy and Chemical Engineering     
A quantum chemistry study on reaction mechanisms of SO2 with O3 and H2O2
Shu-dong JIANG, Zhi-hua WANG, Jun-hu ZHOU, Zheng-cheng WEN, Ke-fa CEN
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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Abstract  Reaction mechanisms of SO2 with O3 and H2O2 were investigated using quantum chemistry ab initio methods. Structures of all reactants, products, and transition states were optimized at the B3LYP/6-311G+(3df,2p) level, and energy calculations were made at the G2M level. SO2 reactions with O3 and H2O2 occurred by O-abstraction and OH-abstraction by SO2, respectively, at length forming SO3+O2 (3Σg) and H2SO4. For SO2+O3 reactions the barrier height was predicted to be 9.68 kcal/mol with a rate constant of 3.61×10−23 cm3/(molecule·s) at 300 K, which is below the experimental upper limit. The rate constant predicted for this reaction accords well with the one provided by National Institute for Standards and Technology (NIST) in 250~500 K. For SO2+H2O2 reactions the barrier height was predicted to be 62.39 kcal/mol with a rate constant of 2.48×10−61 cm3/(molecule·s) at 300 K.

Key wordsSulfur dioxide      Ozone      Hydrogen peroxide      Reaction mechanism      Rate constant      Quantum chemistry     
Received: 11 November 2008     
CLC:  X511  
Cite this article:

Shu-dong JIANG, Zhi-hua WANG, Jun-hu ZHOU, Zheng-cheng WEN, Ke-fa CEN. A quantum chemistry study on reaction mechanisms of SO2 with O3 and H2O2. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(9): 1327-1333.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820787     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I9/1327

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