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Citation: ZHONG Shun-He, CHEN Song-Zhe, XIN Xiu-Lan. Laser Stimulated Surface Reaction of C₂H₄ on FePO₄[J]. Chinese Journal of Applied Chemistry, ;2002, 19(1): 15-17. shu

Laser Stimulated Surface Reaction of C₂H₄ on FePO₄

1.
College of Chemical Engineering and Technology, Tianjin University, Tianjin 300072

Corresponding author: ZHONG Shun-He,
Received Date: 29 March 2001
Available Online: 12 September 2001
Fund Project: 教育部博士点基金资助项目(1999005603) (1999005603)

Solid FePO₄ was prepared by precipitation method. A TEA-CO₂ laser generator was adopted as light source to carry out laser stimulated surface reaction(LSSR) of ethylene. The vibration structure and adsorption state of C₂H_4ad-FePO₄ system were discussed based on the infrared and temperature programmed desorption results. It is showed that C₂H₄ is adsorbed in a molecular state by H atom bonding with terminal O of P=O in FePO₄ surface. 1 079 cm^-1 laser was selected to activate solid surfacial bond P=O, which absorbs the photon energy efficiently. At atmospheric pressure and <100℃, after 100 laser pulses C₂H₄ conversed to butadiene with 100% selectivity. Increasing laser pulse can improve conversion of C₂H₄ without change of selectivity. After 200 pulses, C₂H₄ in the system was consumed in a high level and the product occupied most active sites on the surface, impeding further conversion of C₂H₄. A mechanism of LSSR has been proposed for the conversion of ethylene to butadiene.
- laser stimulated surface reaction,
- iron phosphate,
- ethylene,
- butadiene
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Laser Stimulated Surface Reaction of C₂H₄ on FePO₄