Mixed Oxides Issued from Hydrotalcite Precursors for Toluene and CO Total Oxidation: Comparison of Preparation Method

被引:7
作者
Genty, Eric [1 ]
Abou Serhal, Cynthia [1 ,2 ]
El Khawaja, Rebecca [1 ]
Dib, Hadi [1 ]
Labaki, Madonna [2 ]
Mallard, Isabelle [1 ]
Poupin, Christophe [1 ]
Siffert, Stephane [1 ]
Cousin, Renaud [1 ]
机构
[1] ULCO, UCEIV, EA 4492, MREI, F-59140 Dunkerque, France
[2] Lebanese Univ, Lab Phys Chem Mat LCPM PR2N, Fac Sci, POB 90656, Fanar, Jdeidet El Metn, Lebanon
关键词
Hydrotalcite; Microwaves; Ultrasound; CO; Toluene; Catalytic Oxidation; CATALYTIC-OXIDATION; AL; CE; MICROWAVES; MECHANISM; BASICITY;
D O I
10.1166/jnn.2020.16978
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Catalytic total oxidation is an effective technique for the treatment of industrial VOCs. This emission is generally accompanied by the presence of other products like CO, NOx or other VOC. In this paper, the development of catalysts for the total oxidation of CO and toluene mixture is performed. For this study, Mg6Al2HT hydrotalcites precursors were synthesized by three different methods: co-precipitation, microwaves and ultrasound assisted method. Hydrotalcite precursors have been used in order to develop mixed oxides after calcination for the catalytic oxidation test. Hydrotalcite structure as well as the mixed oxides obtained after calcination was studied, by several techniques: XRD, TEM, DTA/TG, BET, N-2 sorption H-2-TPR. The physico chemical studies revealed modification in the structural characteristics (surface area porosity) as well as in reducibility properties of the formed mixed oxides. The nanocatalyst issued from microwaves synthesis was the most active in these studied reactions for the total oxidation of the mixture. Moreover, addition of CO on the reaction mixture allows obtaining a beneficial effect on the toluene oxidation.
引用
收藏
页码:1130 / 1139
页数:10
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