Characteristics of photocatalytic oxidation of gaseous 2-propanol using thin-film TiO2 photocatalyst

• Published in: Journal of chemical technology and biotechnology (1986) Vol. 79; no. 11; pp. 1293 - 1300
• Main Authors: Chang, Chiu-Ping, Chen, Jong-Nan, Lu, Ming-Chun
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.11.2004; Wiley
• Subjects: 2-propanol; acetone; Applied sciences; Catalysis; Catalytic reactions; Chemical engineering; Chemistry; Exact sciences and technology; General and physical chemistry; kinetics; photocatalysis; Reactors; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; titanium dioxide; Oxidation; Titanium oxide; Photocatalysis; Catalyst; Thin film
• ISSN: 0268-2575; 1097-4660
• DOI: 10.1002/jctb.1128

This work presents a photocatalysis‐based method to treat and purify air because of its broad applicability to common, oxidizable, air contaminants. The effect of oxygen content, temperature, water vapor, and 2‐propanol concentration on the TiO2 surface was investigated. The rate of 2‐propanol decomposition increased with increasing the oxygen content, but was reduced at temperatures higher than 100°C. When water vapor concentration was in the range of 10–355 mmol m−3, the rate of 2‐propanol decomposition was proportional to the water content. However, an opposite result was observed at a higher concentration of water vapor. 2‐Propanol was photooxidized to acetone, and eventually to carbon dioxide and water. The kinetic model of 2‐propanol photooxidation was successfully developed by the competitive Langmuir–Hinshelwood rate form, incorporating the inhibition effect coming from the formation of acetone. Copyright © 2004 Society of Chemical Industry