Partial photocatalytic oxidation of glycerol in TiO2 water suspensions

被引：93
|
作者：
Augugliaro, V. [1 ]
El Nazer, H. A. Hamed [2 ]
Loddo, V. [1 ]
Mele, A. [3 ]
Palmisano, G. [1 ,4 ]
Palmisano, L. [1 ]
Yurdakal, S. [1 ,5 ,6 ]
机构：
[1] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, Schiavello Grillone Photocatalysis Grp, I-90128 Palermo, Italy
[2] Natl Res Ctr, Photochem Dept, Dokki 12622, Egypt
[3] Politecn Milan, Dipartimento Chim Mat & Ingn Chim G Natta, I-20131 Milan, Italy
[4] Univ Roma Tor Vergata, Dipartimento Ingn Elettron, I-00133 Rome, Italy
[5] Anadolu Univ, Fen Fak, Kimya Bolumu, TR-26470 Eskisehir, Turkey
[6] Afyon Kocatepe Univ, Fen Edebiyat Fak, Kimya Bolumu, TR-03100 Afyon, Turkey
来源：
CATALYSIS TODAY | 2010年 / 151卷 / 1-2期
关键词：
Glycerol partial oxidation; Selective photocatalytic oxidation; Titanium dioxide; Reaction pathways; LIQUID-PHASE OXIDATION; SELECTIVE OXIDATION; CATALYTIC-OXIDATION; AQUEOUS SUSPENSION; AROMATIC ALCOHOLS; 4-METHOXYBENZYL ALCOHOL; ALDEHYDES; GREEN; COMPLEXES; CHEMISTRY;
D O I：
10.1016/j.cattod.2010.01.022
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The photo-oxidation of glycerol in aqueous suspensions containing commercial and home-prepared TiO2 samples in the anatase, rutile or anatase-rutile polymorphic phases was investigated by using two different batch photoreactors, an annular photoreactor and a cylindrical photoreactor. The glycerol oxidation products detected in the aqueous phase were: 1,3-dihydroxyacetone, glyceraldehyde, formic acid and carbon dioxide. Two unknown compounds were also detected by electrospray ionization mass spectrometry as peaks at m/z 268 and m/z 176. A plausible mechanism for their formation was suggested based on ESI-MS and MSn experiments. The results indicate that in both systems the commercial samples showed the best performances both for reaction rate and selectivity toward 1,3-dihydroxyacetone, glyceraldehyde, formic acid and CO2. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：21 / 28
页数：8
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