2;催化劑;比表面積;活性評(píng)價(jià)"/> 2作為改性劑,探究了ZrO2與Al2O3的質(zhì)量比對(duì)催化劑的影響。研究結(jié)果表明：隨著ZrO2的加入,Pt粒子先減小后增大；Pt粒子與載體的交互作用先增大后減小?；钚詫?shí)驗(yàn)數(shù)據(jù)分析表明,ZrO2的最佳添加量為40 wt%,CO和C3H6完全氧化溫度分別降低20 oC 、25 oC。貴金屬在催化劑的分散度以及貴金屬與載體的相互作用隨著ZrO2與Al2O3質(zhì)量比的變化而變化。Pt粒子越小,其與載體的交互作用越強(qiáng),這表明催化劑性能越強(qiáng)。"/>

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載體中ZrO2/Al2O3比對(duì)Pt/ZrO2-Al2O3催化劑性能的影響
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昆明理工大學(xué)化學(xué)工程學(xué)院,昆明理工大學(xué)化學(xué)工程學(xué)院,昆明貴研催化劑有限責(zé)任公司

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國家重點(diǎn)新產(chǎn)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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    相比汽油車而言,柴油車具有高效、低油耗的優(yōu)勢(shì)已得到廣泛應(yīng)用。本實(shí)驗(yàn)以ZrO2作為改性劑,探究了ZrO2與Al2O3的質(zhì)量比對(duì)催化劑的影響。研究結(jié)果表明：隨著ZrO2的加入,Pt粒子先減小后增大；Pt粒子與載體的交互作用先增大后減小?；钚詫?shí)驗(yàn)數(shù)據(jù)分析表明,ZrO2的最佳添加量為40 wt%,CO和C3H6完全氧化溫度分別降低20 oC 、25 oC。貴金屬在催化劑的分散度以及貴金屬與載體的相互作用隨著ZrO2與Al2O3質(zhì)量比的變化而變化。Pt粒子越小,其與載體的交互作用越強(qiáng),這表明催化劑性能越強(qiáng)。

    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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陽超琴,王亞明,吳樂剛.載體中ZrO2/Al2O3比對(duì)Pt/ZrO2-Al2O3催化劑性能的影響[J].稀有金屬材料與工程,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
  • 錄用日期:2016-05-18
  • 在線發(fā)布日期: 2017-11-16
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