Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (03): 201-205.doi: 10.3866/PKU.WHXB20010303

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Study on the Ignition Process for the Catalytic Partial Oxidation of Methane to Synthesis Gas by MS-TPSR Technique

Ji Ya-Ying;Li Wen-Zhao;Xu Heng-Yong;Chen Yan-Xin   

  1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences,Dalian 116023
  • Received:2000-07-04 Revised:2000-10-20 Published:2001-03-15
  • Contact: Li Wen-Zhao E-mail:wzli@ms.dicp.ac.cn

Abstract: The ignition processes for the catalytic partial oxidation of methane( POM) to synthesis gas over the oxidized nickel, metallic nickel as well as Pta dded oxidized nickel catalysts (represented as NiO, Ni0 and PtNiO, respectivel y) were studied by temperatureprogrammed surface reaction (TPSR)technique. The results showed that the ignition behavior for POM on NiO was almost similar to that on Ni0 in the reacting atmosphere of CH4 and O2, Ni0 was first oxidized to NiO, then the deep oxidation of methane took place on NiO at T< 760 ℃. POM gr adually initiated at ~ 770 ℃ on Ni0 and NiO catalysts, however, even at ~ 520 ℃ could POM rapidly take place on PtNiO catalyst. the catalytic performance of POM initiated on PtNiO catalyst at about 500 ℃ in a fluidized bed was the same as that on Ni0, which indicated that the addition of Pt was beneficial to t he reduction of NiO to active Ni0, therefore the addition of Pt reduced the init ial temperature for POM.

Key words: Partial oxidation of methane, Synthesis gas, Fluidized bed, Ni cat alyst