Kinetics of Anatase TiO2Surface Area Reduction in a Mixture of HCl, H2O, and O2: l, Experimental Study
作者:
Frédéric Gruy,
Michèle Pijolat,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 3
页码: 657-661
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb07855.x
出版商: Blackwell Publishing Ltd
关键词: anatase;surface area;reduction;kinetics;gases
数据来源: WILEY
摘要:
Changes in the surface area of anatase TiO2were investigated at 690 K as a function of the gas composition in mixtures of hydrogen chloride, water vapor, and oxygen. The chlorine content on the catalyst support was not dependent on the annealing time, which indicates that the adsorption equilibrium is reached very quickly. The kinetics of surface area were obtained as a function of partial pressure of HCI (from 0.1 to 40 kPa), water vapor (from 0.05 to 10 kPa), and oxygen (from 0.4 to 20 kPa). A mathematical expression for the rate of surface area loss was obtained which includes the partial pressure of water and the chlorine content at the surface of anatase.
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