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Chemical Reaction and Energy Transfer Between Hot H Atoms and CO2 Molecules
Cong-yun Shi ,Li Ren ,Fan-ao Kong*
Author NameAffiliation
Cong-yun Shi Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 
Li Ren Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 
Fan-ao Kong* Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 
Abstract:
Collisions between hot H atoms and CO2 molecules were studied experimentally by time-resolved Fourier transform infrared emission spectroscopy. H atoms with three translational energies, 174.7, 241.0 and 306.2 kJ/mol respectively, were generated by UV laser photolysis to initiate a chemical reaction of H+CO2!OH+CO. Vibrationally excited CO (v≤2) was observed in the spectrum, where CO was the product of the reaction. The highly efficient T-V energy transfer from the hot H atoms to the CO2 was verified too. The highest vibrational level of v=4 in CO2 (v≤3) was found. Rate ratio of the chemical reaction to the energy transfer was estimated as 10.
Key words:  Energy transfer, H atom, CO2 Molecule
FundProject:
H原子与CO2分子碰撞的化学反应与能量转移
石从云 ,任丽 ,孔繁敖
摘要:
用时间分辨傅立叶红外发射光谱的方法对H原子与CO2分子 的碰撞动力学进行了实验研究. 用紫外激光光解的方法分别制备 出三个不同平动能为174.7、241.0和306.2 kJ/mol的氢原子,并引 发H+CO2!OH+CO反应. 观察到了反应的产物,即振动激发的CO (v ·2). 同时也看到了在H原子与CO2分子的碰撞中发生高效的T- V 能量转移. CO2的反对称伸缩模的最高振动能级为v=4. 化学反应与 能量转移的速率之比大约为10.
关键词:  H,CO2, 碰撞,时间分辨傅立叶红外发射光谱,能量转移
DOI:10.1360/cjcp2006.19(6).473.5
分类号: