Comparison of Noble Metal and Oxide Catalysts

6 Comparison of Noble Metal and Oxide Catalysts. - A few studies have directly compared the activity of noble metal and oxide based catalysts. The combustion of a range of C5-C9 hydrocarbon VOCs in humidified air by 0.1% Pt/3% Ni/Al203 and ceria promoted hopcalite commercial catalysts has been compared [96]. The Pt based catalyst showed no deactivation during 253 continuous operation, whilst over 297 days the temperature of hopcalite catalyst required an 85°C increase to maintain 99% conversion. However, the final operating temperature of the hopcalite catalyst was 400°C, 30°C lower than the isothermal operating temperature of the Pt system. A first order concentration deactivation model was developed and predicted a 362 day lifetime for the 

Mukhopadhyay, E.C. Moretti, Current and Potential Future Industrial Practices for Controlling Volatile Organic Compounds, American Institute of Chemical Engineers, Center for Waste Control Management, New York, 1993. 

Jennings, M.A. Palazzolo, N.E. Krohn, R.M. Parks, R.S. Berry, K.K. Fidler, Catalytic Incineration for the Control of Volatile Organic Compound Emission, Pollution Technology Review, (Noyes Ed.), No. 121, (1985). 

Golodets, Heterogeneous Catalytic Reactions Involving Molecular Oxygen, Studies in Surface Science and Catalysis, Elsevier, Amsterdam, 15, (1982). 

Nagata, T. Takakura, S. Tashiro, M. Kishida, K. Mizuno, I. Tamori, K. 

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