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采用浸渍法在堇青石蜂窝陶瓷载体表面上涂覆了Ce0.8Zr0.2O2、Ce0.8Zr0.15La0.05Oδ涂层，同时将活性组分Pd引入涂层，制备了整体催化剂。催化剂的涂层Ce0.8Zr0.15La0.05Oδ、Ce0.8Zr0.2O2与载体结合牢固，具有良好的抗振荡性能。La3+的掺杂使的CeO2-ZrO2涂层高温稳定性能提高，比表面积增大，La3+的掺杂使得CeO2-ZrO2固溶体产生更多氧缺位，使高温焙烧催化剂涂层Ce4+物种还原温度降低约60℃，催化剂具有更加优异的催化活性和高温稳定性。Pd/Ce0.8Zr0.15La0.05Oδ/载体催化剂以Ce0.8Zr0.2O2、Ce0.8Zr0.15La0.05Oδ为涂层的整体催化剂低温焙烧（500oC、700 oC）催化活性相当，高温焙烧（800 oC、 900 oC、 1000 oC）后者的催化活性明显高于前者，说明催化剂具有更加好的高温稳定性。因此，作为消除挥发性有机化合物（VOCs）催化剂涂层，Ce0.8Zr0.15La0.05Oδ比Ce0.8Zr0.2O2涂层具有更加优异的性能。 自己翻译了部分，实在翻译不下来，请各位大虾帮忙~~~T wo novel washcoats Ce0.8Zr0.15La0.05Oδ、Ce0.8Zr0.2O2 was prepared by an impregnation method, which acted as a host for the active Pd component to prepare a Pd/Ce0.8Zr0.15La0.05Oδ/substrate、Pd/Ce0.8Zr0.2O2/substrate monolithic catalyst for toluene combustion. The washcoats could tightly anchor onto the substrate and had strong vibration-shock resistance.（）As catalyst washcoat,the Ce0.8Zr0.15La0.05Oδ has a better thermal stability than the washcoat Ce0.8Zr0.2O2, the developed Pd/Ce0.8Zr0.15La0.05Oδ/substrate monolithic catalyst in this work was promising for eliminating Volatile organic compounds (VOCs) |
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dy322112
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4楼2008-07-18 09:19:06
chengcj.2008
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试一下: Ce0.8Zr0.2O2、Ce0.8Zr0.15La0.05Oδ coating was coated on the surface of iolite cellular ceramic support by impregnation method, and active Pd component was introduced into the coating to furnish the preparation of monolithic catalyst. The catalyst coating Ce0.8Zr0.15La0.05Oδ、Ce0.8Zr0.2O2 bound strongly to the support, which had good anti-oscillation property. Dopped La3+ promoted the high temperature stability of CeO2-ZrO2 coating and increased the specific surface area. Furthermore, the dopped La3+ made CeO2-ZrO2 solid solution form more oxygen vacancies and caused the reductive temperature of high-temperature calcination catalyst coating Ce4+ to decrease about 60℃, thus making the catalyst have more excellent catalytic activities and high-temperature stability. Pd/Ce0.8Zr0.15La0.05Oδ/ supported catalyst and the monolithic catalyst coated by Ce0.8Zr0.2O2、Ce0.8Zr0.15La0.05Oδ had similar catalytic activity of low-temperature （500oC、700 oC）calcination, while at high calcination temperatures （800 oC、 900 oC、 1000 oC）, the latter was obviously more active than the former, which indicated that the catalyst had more high-temperature stability. Therefore, Ce0.8Zr0.15La0.05Oδ coating owned better performance than Ce0.8Zr0.2O2 as the coating for removing volatile organic compounds （VOCs）. |
2楼2008-07-17 16:42:14
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The cordierite honeycomb-like ceramic surface is coated with the Ce0.8Zr0.2O2、Ce0.8Zr0.15La0.05Oδ coating the pickling process, and the introduction of the active component Pd makes the monolithic catalyst. the catalyst coating with Ce0.8Zr0.2O2、Ce0.8Zr0.15La0.05Oδ firmly binds to the carrier so that it has a well anti-oscillation property. 明天晚上再看看吧，有点晚了 |
3楼2008-07-17 23:44:30
