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载体中ZrO2/Al2O3比对Pt/ZrO2-Al2O3催化剂性能的影响
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昆明理工大学化学工程学院,昆明理工大学化学工程学院,昆明贵研催化剂有限责任公司

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国家重点新产品( 2011EG115008)


ZrO2/Al2O3 Ratio in Carrier on Performance Influence of Pt/ZrO2-Al2O3 Catalyst
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Faculty of Chemical Engineering,Kunming University of science and technology,Kunming,Faculty of Chemical Engineering,Kunming University of science and technology,Kunming,Kunming Sino-Paltinum Metals Catalyst CoLtd,Kunming

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    摘要:

    相比汽油车而言,柴油车具有高效、低油耗的优势已得到广泛应用。本实验以ZrO2作为改性剂,探究了ZrO2与Al2O3的质量比对催化剂的影响。研究结果表明:随着ZrO2的加入,Pt粒子先减小后增大;Pt粒子与载体的交互作用先增大后减小。活性实验数据分析表明,ZrO2的最佳添加量为40 wt%,CO和C3H6完全氧化温度分别降低20 oC 、25 oC。贵金属在催化剂的分散度以及贵金属与载体的相互作用随着ZrO2与Al2O3质量比的变化而变化。Pt粒子越小,其与载体的交互作用越强,这表明催化剂性能越强。

    Abstract:

    Diesel engines have been more and more widely used in heavy duty vehicles because of high efficiency and low fuel consumption compared with petrol engines. Taking ZrO2 as the modified additive, the influence of the mass ratio of ZrO2 and Al2O3 on catalytic performance was studied. The results show that, with an increase of ZrO2 doping, the Pt particles becomes smaller at first and then larger in the catalyst. The interaction between Pt and the carrier increases and then decreases. Analysis of the activity data shows the optimized doping amount of ZrO2 is 40 wt%, the CO/C3H6 complete oxidation temperatures reduced by 20 oC and 25 oC, respectively. The study shows that, when the ZrO2/Al2O3 mass ratio in the carrier is varied, the precious metal dispersion on the catalyst and the precious metals interaction with the carrier are different with varying levels. The smaller the Pt particle size, the stronger the interaction between precious metal and the carrier, which indicates that the performance of catalyst is higher.

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阳超琴,王亚明,吴乐刚.载体中ZrO2/Al2O3比对Pt/ZrO2-Al2O3催化剂性能的影响[J].稀有金属材料与工程,2017,46(8):2049~2054.[YANG Chaoqin, WANG Yaming, WU Legang. ZrO2/Al2O3 Ratio in Carrier on Performance Influence of Pt/ZrO2-Al2O3 Catalyst[J]. Rare Metal Materials and Engineering,2017,46(8):2049~2054.]
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  • 收稿日期:2015-12-15
  • 最后修改日期:2016-04-12
  • 录用日期:2016-05-18
  • 在线发布日期: 2017-11-16
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