Effect of water vapor over Pd–Co/SZ catalyst for the NO selective reduction by methane
Effect of water vapor over Pd–Co/SZ catalyst for the NO selective reduction by methane
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DOI：
10.1016/j.catcom.2004.11.002
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发表时间：
2005
影响因子：
3.7
通讯作者：
C. Quincoces;Sichem Guerrero;P. Araya;M. G. González
中科院分区：
文献类型：
--
作者：
C. Quincoces;Sichem Guerrero;P. Araya;M. G. González
在700℃的混合反应条件下，研究了过量o2存在下Pd - Co、Pd和Co催化剂对NO的选择性催化还原（SCR）反应。在Pd/SZ上添加Co对催化活性有促进作用，特别是在0.2%Pd-2%Co /SZ上，在500℃、31000 h−1条件下，NO转化率最高提高60%。该双金属催化剂在水蒸气存在下表现出实际活性。在6%水蒸气存在的情况下，获得了50小时以上的nox稳定转化。采用x射线衍射（XRD）、漫反射光谱（DRS）和程序升温还原（TPR）技术对催化剂的组成和活性进行了表征。
The selective catalytic reduction (SCR) of NO by CH4in the presence of excess O2has been studied on Pd–Co, Pd and Co catalysts supported on sulfated zirconia (SZ) and activated in reaction mixture at 700 °C. After the addition of Co on Pd/SZ, an promoting effect on the catalytic activity was achieved, especially on 0.2%Pd–2%Co/SZ, which showed the maximum NO conversion higher 60% at 500 °C and 31,000 h−1. The bimetallic catalyst presented practical activity in the presence of water vapor. Stable NOxconversion was obtained for over 50 h in the presence of 6% water vapor. In order to correlate the catalysts composition with their activity, they were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS) and temperature programmed reduction (TPR) techniques.