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Catalytic decomposition of ammonia to COx-free hydrogen over Ni/ZSM-5 catalysts: A comparative study of the preparation methods
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2018-05-30 , DOI: 10.1016/j.apcata.2018.05.038
Zhong-Pan Hu , Chen-Chen Weng , Chong Chen , Zhong-Yong Yuan

A series of Ni/ZSM-5 catalysts are prepared by the methods of wet impregnation (IM), deposition-precipitation (DP), solid state ion exchange (SSIE), and modified solid state ion exchange (MSSIE), and used for catalytic decomposition of ammonia to COx-free hydrogen. Their physicochemical properties are characterized by XRD, N2 sorption, TEM, NH3-TPD, H2-TPR, solid-state NMR, and XPS techniques. It is revealed that the preparation methods could obviously influence the Ni species and catalytic performance of Ni/ZSM-5 catalysts, and the catalyst prepared by MSSIE method exhibits the best catalytic activity due to the presence of strong metal-support interaction between highly dispersed Ni nanoparticles and ZSM-5 support. The stability testing results showed almost no activity loss over Ni/ZSM-5(MSSIE) catalyst at 650 °C for 60 h, indicating a very promising catalyst for ammonia decomposition.



中文翻译:

Ni / ZSM-5催化剂上氨催化分解为无CO x的氢:制备方法的比较研究

通过湿法浸渍(IM),沉积-沉淀(DP),固态离子交换(SSIE)和改性固态离子交换(MSSIE)的方法制备了一系列Ni / ZSM-5催化剂,并将其用于催化氨分解为无CO x的氢。它们的理化性质由XRD,N 2吸附,TEM,NH 3 -TPD,H 2表征。-TPR,固态NMR和XPS技术。结果表明,制备方法对Ni / ZSM-5催化剂的Ni种类和催化性能有明显影响,而MSSIE法制备的催化剂由于高度分散的Ni之间存在强的金属-载体相互作用而表现出最佳的催化活性。纳米颗粒和ZSM-5载体。稳定性测试结果表明,Ni / ZSM-5(MSSIE)催化剂在650°C下持续60 h几乎没有活性损失,表明氨分解的催化剂非常有前景。

更新日期:2018-05-30
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