引用本文:
马臻, 华伟明, 唐颐, 高滋. 用以分解氟里昂-12的新型催化剂WO3/Al2O3[J]. 应用化学,
2000, 17(3): 319-321.
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.
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.
用以分解氟里昂-12的新型催化剂WO3/Al2O3
English
A Novel Catalyst WO3/Al2O3 for Decomposition of CFC-12
Abstract:
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.
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Key words:
- dichlorodifluoromethane
- / catalytic decomposition
- / WO3/Al2O3
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