Controllable preparation and catalytic performance of Pd/anodic alumina oxide@Al catalyst for hydrogenation of ethylanthraquinone
Controllable preparation and catalytic performance of Pd/anodic alumina oxide@Al catalyst for hydrogenation of ethylanthraquinone
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Pd/阳极氧化铝@Al催化剂的乙基蒽醌加氢可控制备及催化性能
DOI：
10.1016/j.ces.2015.04.003
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发表时间：
2015-10-02
影响因子：
4.7
通讯作者：
Li, Dianqing
中科院分区：
文献类型：
--
作者：
Hong, Runrun;Feng, Junting;Li, Dianqing
采用两步低电位阳极氧化法制备了不同孔径和深度的阳极氧化铝（AAO）载体。首次将制得的具有e-环形状的AAO载体用于负载型Pd催化剂的制备。研究了Pd/AAO@Al催化剂在蒽醌法生产过氧化氢的关键步骤2-乙基蒽醌（eAQ）2-乙基蒽醌加氢反应中的催化性能。与球形Al_2O_3负载Pd催化剂相比，Pd/AAO@Al催化剂具有更高的蒽醌加氢活性和选择性，这主要是由于AAO载体上有序的圆柱形孔阵列、较短的扩散距离和限制作用。此外，还研究了孔径和孔深对eAQ加氢催化性能的影响。Pd纳米粒子负载在AAO载体上，孔径为24.5 nm，深度为18 μ m，对eAQ的加氢表现出最好的催化性能。(C)2015爱思唯尔有限公司版权所有。
Anodic alumina oxide (AAO) supports with different pore sizes and depths were controllable prepared by a two-step low-potential anodizing process. The prepared AAO supports with e-ring shape were utilized to prepare supported Pd catalysts by impregnaiton method for the first time. The catalytic performance of the Pd/AAO@Al catalysts were investigated in the catalytic hydrogenation of 2-ethylanthractuinone (eAQ) 2-ethylanthrahydroquinone, a key step in the anthraquinone process for the manufacture of hydrogen peroxide. Compared with Pd supported on spherical Al2O3 catalyst, Pd/AAO@Al catalysts showed much higher anthraquinone hydrogenation activity and preferable selectivity due to the highly ordered array of cylindrical shaped pores, short diffusion distance and confinement effect of the AAO supports. Furthermore, the effect of pore size and depth to the catalytic performance towards hydrogenation of eAQ has also been studied. Pd nanoparticles supported on AAO support with 24.5 nm pore size and 18 mu m depth exhibited the best catalytic performance towards hydrogenation of eAQ. (C) 2015 Elsevier Ltd. All rights reserved.