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Citation: MA Zhen, HUA Wei-Ming, TANG Yi, GAO Zi. A Novel Catalyst WO₃/Al₂O₃ for Decomposition of CFC-12[J]. Chinese Journal of Applied Chemistry, ;2000, 17(3): 319-321. shu

A Novel Catalyst WO₃/Al₂O₃ for Decomposition of CFC-12

1.
Department of Chemistry, Fudan University, Shanghai 200433

Received Date: 25 October 1999
Available Online: 20 January 2000
Fund Project:

The catalytic decomposition of dichlorodifluoromethane(CFC-12) in the presence of water vapour has been carried out on WO₃/Al₂O₃ prepared by impregnating Al(OH)₃ with aqueous ammonium metatungstate followed by drying and calcining at 700℃ in air. On WO₃/Al₂O₃ CFC-12 was decomposed completely at 305℃, while on simple Al₂O₃ it needed 370℃; WO₃ had only a poor activity. NH₃-TPD results showed that this enhancement in activity can be explained in terms of the great acidity of WO₃/Al₂O₃. No by-product was detected during decomposition of CFC-12 on WO₃/Al₂O₃, but on unmodified Al₂O₃ CFC-13 was found to be amounted to 4%. The CFC-12 conversion over WO₃/Al₂O₃ at 295℃ decreased from 97% to 90% in first 8 h and then took a steady value.
- dichlorodifluoromethane,
- catalytic decomposition,
- WO₃/Al₂O₃
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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A Novel Catalyst WO3/Al2O3 for Decomposition of CFC-12

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通讯作者: 陈斌, bchen63@163.com

A Novel Catalyst WO₃/Al₂O₃ for Decomposition of CFC-12