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One-pot synthesis of mesoporous Al2O3-supported Pt-Pd catalysts for toluene combustion
Catalysis Communications ( IF 3.7 ) Pub Date : 2018-07-02 , DOI: 10.1016/j.catcom.2018.07.003
Xin Liu , Qiulin Zhang , Ping Ning , Tong Tang , Jia Hu , Weikang Su

Mesoporous Al2O3-supported Pt-Pd catalyst was prepared via a one-step evaporation-induced self-assembly (EISA) process and employed for toluene combustion. It was found that the T90 (160 °C) and activation energy (43 kJ/mol) of the one-pot prepared Pt-Pd-Al2O3 catalyst are lower than the conventional Al2O3- supported Pt-Pd catalyst prepared by the wet impregnation method (250 °C, 49.8 kJ/mol). Moreover, the one-pot prepared Pt-Pd-Al2O3 catalyst shows the presence of nano Pt-Pd particles in the mesochannels. In terms of the one-pot EISA approach, the bi-metallic Pt-Pd-Al2O3 catalyst exhibits reduced noble-metal mean particle size (6.1 nm) and T90 than the mono-metallic Pt-Al2O3 and Pd-Al2O3 catalysts. It was demonstrated that the present Pt-Pd-Al2O3 catalytic system exhibits the lowest T90 and T50 parameter values and apparent activation energy at comparable space velocities and toluene feed composition compared to several best performed catalysts reported in the literature.



中文翻译:

一锅合成介孔Al 2 O 3负载的Pt-Pd催化剂用于甲苯燃烧

通过一步蒸发诱导自组装(EISA)工艺制备了介孔Al 2 O 3负载的Pt-Pd催化剂,并将其用于甲苯燃烧。发现一锅法制备的Pt-Pd-Al 2 O 3催化剂的T 90(160°C)和活化能(43 kJ / mol)低于常规的Al 2 O 3负载的Pt-Pd通过湿法浸渍法制备的催化剂(250°C,49.8 kJ / mol)。而且,一锅法制备的Pt-Pd-Al 2 O 3催化剂显示出介孔中存在纳米Pt-Pd颗粒。就一锅法EISA方法而言,双金属Pt-Pd-Al 2与单金属Pt-Al 2 O 3和Pd-Al 2 O 3催化剂相比,O 3催化剂的贵金属平均粒径(6.1 nm)和T 90降低。已经证明,与文献中报道的几种性能最佳的催化剂相比,本发明的Pt-Pd-Al 2 O 3催化体系在相当的空速和甲苯进料组成下表现出最低的T 90T 50参数值以及表观活化能。

更新日期:2018-07-02
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