负载型Pd-CuO/γ-Al_2O_3双金属催化剂上O_2-TPD-MS的特性 |
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引用本文: | 蒋晓原,周仁贤,罗孟飞,郑小明. 负载型Pd-CuO/γ-Al_2O_3双金属催化剂上O_2-TPD-MS的特性[J]. 石油化工, 1998, 0(3) |
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作者姓名: | 蒋晓原 周仁贤 罗孟飞 郑小明 |
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作者单位: | 杭州大学催化研究所 |
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基金项目: | 浙江省科学技术委员会基金 |
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摘 要: | 运用XRD、TPD-MS及色谱-微反流动法等手段,研究了Pd-CuO/γ-Al2O3双金属催化剂物相结构、表面氧性能及对催化活性的影响。结果表明,双金属催化剂中由于Pd-CuO间的相互作用,使催化剂活性组份的表面分散状态发生了变化。研究还表明不同的Pd/CuO比对CO和CH4的氧化具有不同的活性,可通过调变活性组份含量比,改善催化剂上氧的吸、脱附行为,从而起到提高活性的作用。
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关 键 词: | 负载型催化剂 表面氧脱附 双金属催化剂 |
O_2 TPD MS Properties of Supported Pd CuO/γ Al_2O_3 Bimetallic Catalysts |
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Abstract: | RD,TPD MS and a microreactor GC system were used to study the reducibility, surface oxygen desorption and recovery ability of Pd CuO/γ Al_2O_3 bimetallic catalystsExperimental results show that due to the interaction between Pd and CuO in the bimetallic catalyst,the surface dispersion state of the active component has changed a great deal.In addition,different Pd/CuO ratio has different oxidation activity for the oxidation of CO and CH_4By adjusting and changing the ratio of active component,it is possible to improve the surface oxygen desorption and recovery ability of catalysts,thereby increase the catalytic oxidation activity |
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Keywords: | supported catalysts surface oxygen desorption bimetallic calalyst |
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