Honeycomb CuO/Al2O3/Cordierite Catalyst for Selective Catalytic Reduction of NO by NH3Effect of Al2O3 Coating

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• 作者：Junhua Su ; Qingya Liu ; Zhenyu Liu ; Zhanggen Huang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2008
• 出版时间：July 2, 2008
• 年：2008
• 卷：47
• 期：13
• 页码：4295 - 4301
• 全文大小：898K
• 年卷期：v.47,no.13(July 2, 2008)
• ISSN：1520-5045

文摘

Al₂O₃-coated cordierite has been widely used as a catalyst’s support. In this work, three Al₂O₃ precursors or alumina sols are studied to understand the effect of type, viscosity, and grain size of the sols and Cl⁻ on properties and SCR activities of honeycomb CuO/Al₂O₃/cordierite catalysts. X-ray diffraction (XRD), N₂ adsorption, scanning electron microscopy and energy dispersive X-ray (SEM-EDX) techniques are used for analyses. Results show that the viscosity and average grain size of the sol have significant influences on the amount and stability of the Al₂O₃ coating. The sol synthesized from AlCl₃ and aluminum is the best among the three sols in terms of less coating cycle, stability of the coating, and selective catalytic reduction (SCR) activity. Cl¹⁻ introduced in preparation must be washed out because it deactivates the SCR activity.