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Citation: Ji Chun-Xin, Wei Zhao-Xin, Xin Qin. Study of WO₃ Supported on Different Carrier by TPS[J]. Acta Physico-Chimica Sinica, ;1994, 10(10): 874-881. doi: 10.3866/PKU.WHXB19941003 shu

Study of WO₃ Supported on Different Carrier by TPS

1.
State Key Laboratory for Catalysis of Dalian Institute of Chemical Physics,Dalian 116023

Received Date: 20 April 1993
Available Online: 15 October 1994

The sulfiding procedures of WO3 supported on 7-Al2O3, TiO2-Al2O3 and carbon were examined by TPS (Temperature-programmed-sulfiding) method. Results show that the number of sulfiding peaks of WO3 increases when the loading of WO3 is raised, it can be elucidated that there exist simultaneously various W spieces on the three different carriers when the loading of WO3 becames higher. Comparing the sulfiding temperature of Wos/Tioz-Al:O3 with that of WO3/7-Al2O3, it is found that the presence of TiO2 covered on Al2O3 surface can make WO3 sulfided at lower temperature when WO3 loading is below one monolayer. When carbon is taken as the carrier, the sulfiding temperature of WOs is greatly decreased, and the phenomenon of carbon carrier being gasified is observed when temperature is higher than 7OoK during our experiment. In addition, a structure model of WO3 carried on TiO2-Al2O3 is suggested in this issue.
- WO3,
- γ-Al2O3,
- TiO2-Al2O3,
- Carbon,
- TPS
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Study of WO₃ Supported on Different Carrier by TPS