高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 121.

• Chemistry in Energy Sciences • 上一篇    下一篇

Mechanistic Study of Partial Oxidation of Methane to Syngas over c Pd/SiO2 Catalyst

WENG Wei-Zheng, YAN Qian-Gu, LIAO Yuan-Yan, LIU Ying, WAN Hui-Lin   

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry and Institute of Physical Chemistry, Xiamen University, Xiamen 361003
  • 出版日期:2000-12-31 发布日期:2000-12-31
  • 基金资助:

    Supported by the Ministry of Science and Technology (No. G1999022408).

Mechanistic Study of Partial Oxidation of Methane to Syngas over c Pd/SiO2 Catalyst

WENG Wei-Zheng, YAN Qian-Gu, LIAO Yuan-Yan, LIU Ying, WAN Hui-Lin   

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry and Institute of Physical Chemistry, Xiamen University, Xiamen 361003
  • Online:2000-12-31 Published:2000-12-31
  • Supported by:

    Supported by the Ministry of Science and Technology (No. G1999022408).

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摘要：

Partial oxidation of methane (POM) to make syngas has been largely studied in recent years because of its potential to reduce the cost of syngas. Two reaction schemes have been proposed for the reaction:one is the sequence of combustion of CH4 followed by reforming of unconverted CH4 with CO2 and H2O,and the other is the direct partial oxidation of CH4 to CO and H2 without the experience of CO2 and H2O as reaction intermediates. In the industrial process, if the combustion-reforming mechanism predominantly contributes to the conversion of methane to syngas, severe heat management problems have to be taken into account. Therefore, the elucidation of the reaction pathway is of vital importance. In this paper, in situ time-resolved FTIR (in situ TR-FTIR) spectroscopy was used to study the POM reaction over lwt%Pd/SiO2. The results of catalytic performance evaluation on the POM reaction over lwt%Pd/SiO2 under different space velocity are also presented. It is expected that the additional proof can be presented to interpret POM mechanism.

Abstract:

Partial oxidation of methane (POM) to make syngas has been largely studied in recent years because of its potential to reduce the cost of syngas. Two reaction schemes have been proposed for the reaction:one is the sequence of combustion of CH4 followed by reforming of unconverted CH4 with CO2 and H2O,and the other is the direct partial oxidation of CH4 to CO and H2 without the experience of CO2 and H2O as reaction intermediates. In the industrial process, if the combustion-reforming mechanism predominantly contributes to the conversion of methane to syngas, severe heat management problems have to be taken into account. Therefore, the elucidation of the reaction pathway is of vital importance. In this paper, in situ time-resolved FTIR (in situ TR-FTIR) spectroscopy was used to study the POM reaction over lwt%Pd/SiO2. The results of catalytic performance evaluation on the POM reaction over lwt%Pd/SiO2 under different space velocity are also presented. It is expected that the additional proof can be presented to interpret POM mechanism.

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