Toluene oxidation on Pd catalysts supported by CeO2-Y2O3 washcoated cordierite honeycomb
Toluene oxidation on Pd catalysts supported by CeO2-Y2O3 washcoated cordierite honeycomb
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DOI：
10.1016/j.apcatb.2006.06.023
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发表时间：
2007-01-15
影响因子：
22.1
通讯作者：
Jin, Ling-Yun
中科院分区：
文献类型：
--
作者：
Luo, Meng-Fei;He, Mai;Jin, Ling-Yun
采用浸渍法制备了一种新型的陶瓷蜂窝状CeO2-Y2O3(CY)涂层，并以其为载体制备了Pd催化剂。通过甲苯完全燃烧模型反应考察了Pd/CY催化剂的催化性能。用X射线衍射仪、拉曼光谱、氢-2-TPR和扫描电子显微镜对CY涂层载体和Pd/CY催化剂进行了表征。结果表明，与常规涂层相比，CY涂层具有更好的附着力、更高的耐振性和耐热性。CY涂层能很好地将Pd固定在蜂窝陶瓷衬底上。在较高的焙烧温度下，CeO_2-Y_2O_3固溶体的形成和PdO的稳定存在，使其具有较好的热稳定性。在500℃焙烧的Pd/CY催化剂上，甲苯转化率为99%，反应时间长达30小时。(C)2006 Elsevier B.V.版权所有。
A novel CeO2-Y2O3 (CY) washcoat on cordierite honeycomb was prepared by an impregnation method, which was used as a support to prepare a Pd catalyst. A model reaction of the complete combustion of toluene was conducted to evaluate the performance of the developed Pd/CY catalyst. The CY washcoat support and the Pd/CY catalyst were characterized by XRD, Raman spectroscopy, H-2-TPR and SEM techniques. The results show that compared with conventional washcoat the CY washcoat has better adhesion and higher vibration- and heat-resistance. The CY washcoat can anchor well Pd onto the cordierite honeycomb substrate. The formation of a CeO2-Y2O3 Solid solution and the steady present of PdO occur at high calcination temperatures, resulting in a better thermal stability. On a Pd/CY catalyst calcined at 500 degrees C, a 99% of toluene conversion was obtained at 2 10 degrees C, and it was stable for reaction time up to 30 h. (c) 2006 Elsevier B.V. All rights reserved.