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Photocatalytic Selectivities of Ethane, Methane and Dimethylether Controlled by Reaction Conditions and TiO2 Structure in the Degradation of Acetic Acid
ChemistrySelect ( IF 2.1 ) Pub Date : 2018-12-04 , DOI: 10.1002/slct.201802700
Son Ngo 1, 2 , Lynn M. Betts 1 , Frederic Dappozze 1 , Chantal Guillard 1
Affiliation  

The impact of photon flux, humidity and residence time using TiO2 P25 and of the surface area of a series of CristalActiv PC TiO2 anatase, on the selectivities of products formed in the continuous photocatalytic degradation of gaseous acetic acid (AA) on the scale of a few hundred ppm, in the presence or absence of O2, was investigated. Under a continuous flow of air HCHO and C2H6 were the most important products detected. CH3OH was also formed but to a lesser extent. Under a continuous flow of N2, the formation of these three products decreases whereas CH3OCH3, an interesting product which can be used as alternative fuel and CH4, is yielded. The impact of the experimental conditions on product formation, taking into account the intermediate formation of H2O2 and the favorable impact of the surface area on the formation of CH4 in the absence of oxygen and its opposite effect on the formation of C2H6 in the presence of air, was discussed.The presence of rutile phase in TiO2 P25 was also highlighted.

中文翻译:

反应条件和TiO2结构控制的乙酸降解中乙烷,甲烷和二甲醚的光催化选择性

使用TiO 2 P25的光子通量,湿度和停留时间以及一系列CristalActiv PC TiO 2锐钛矿的表面积,对规模化气态乙酸(AA)连续光催化降解形成的产物的选择性产生影响在有或没有O 2的情况下,研究了数百ppm的二氧化硫。在连续的空气流中,HCHO和C 2 H 6是最重要的产物。还形成了CH 3 OH,但程度较小。在连续的N 2流下,这三种产物的形成减少,而CH 3 OCH 3产生了可以用作替代燃料和CH 4的有趣产品。考虑到H 2 O 2的中间形成以及在没有氧气的情况下表面积对CH 4形成的有利影响以及它们对C 2形成的相反影响,实验条件对产物形成的影响讨论了在空气中存在H 6的情况。还着重指出了TiO 2 P25中金红石相的存在。
更新日期:2018-12-04
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