Toluene Combustion over Pd-Ce0.4Zr0.6O2 Directly Washcoated Monolithic Catalysts
来源期刊：JOURNAL OF RARE EARTHS2007年第6期
论文作者：Luo Mengfei Zhang Qingbao Xie Yunlong Teng Botao Zhao Leihong
Key words：toluene combustion; monolithic catalyst; volatile organic compounds; rare earths;
Abstract: A Ce0.4Zr0.6O2 washcoat was prepared using an impregnation method, which acted as a host for the active Pd component to prepare a Pd-Ce0.4Zr0.6O2/substrate monolithic catalyst for toluene combustion.The catalyst was characterized by scanning electron microscopy (SEM), Raman spectroscopy, Brunauner-Emmett-Teller (BET), and carbon monoxide temperature-programmed reduction (CO-TPR).It was found that the washcoat had strong vibration-shock resistance according to an ultrasonic test.The Pd-Ce0.4Zr0.6O2/substrate monolithic catalyst calcined at 400 ℃ showed 95% toluene conversion at a temperature as low as 210 ℃.Furthermore, the lowest temperature for 95% toluene conversion was increased by 40 ℃ after the catalyst calcined at 900 ℃, indicating that the catalyst had good thermal stability.The results revealed that the developed catalyst in this study was promising for eliminating volatile organic compounds (VOCs).
Luo Mengfei1，Zhang Qingbao1，Xie Yunlong1，Teng Botao1，Zhao Leihong1
(1.Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua 321004,China)
Abstract:A Ce0.4Zr0.6O2 washcoat was prepared using an impregnation method, which acted as a host for the active Pd component to prepare a Pd-Ce0.4Zr0.6O2/substrate monolithic catalyst for toluene combustion.The catalyst was characterized by scanning electron microscopy (SEM), Raman spectroscopy, Brunauner-Emmett-Teller (BET), and carbon monoxide temperature-programmed reduction (CO-TPR).It was found that the washcoat had strong vibration-shock resistance according to an ultrasonic test.The Pd-Ce0.4Zr0.6O2/substrate monolithic catalyst calcined at 400 ℃ showed 95% toluene conversion at a temperature as low as 210 ℃.Furthermore, the lowest temperature for 95% toluene conversion was increased by 40 ℃ after the catalyst calcined at 900 ℃, indicating that the catalyst had good thermal stability.The results revealed that the developed catalyst in this study was promising for eliminating volatile organic compounds (VOCs).
Key words:toluene combustion; monolithic catalyst; volatile organic compounds; rare earths;
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