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Effects of oxidation pretreatment temperature on Kovar used as CO2 reforming catalyst

Sharon Rose de la Rama ,  Hiroshi Yamada ,  Tomohiko Tagawa

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引用本文: Sharon Rose de la Rama, Hiroshi Yamada, Tomohiko Tagawa. Effects of oxidation pretreatment temperature on Kovar used as CO2 reforming catalyst[J]. 燃料化学学报, 2014, 42(5): 573-581. shu
Citation:  Sharon Rose de la Rama, Hiroshi Yamada, Tomohiko Tagawa. Effects of oxidation pretreatment temperature on Kovar used as CO2 reforming catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(5): 573-581. shu

Effects of oxidation pretreatment temperature on Kovar used as CO2 reforming catalyst

    通讯作者: Sharon Rose de la Rama(1983- ), PhD candidate (Chemical Engineering), main research: Ni-containing alloys as heterogeneous catalyst for biomass-derived hydrocarbon CO2 reforming, E-mail: srdelarama@yahoo.com.
  • 基金项目:

    Supported by a research grant (K2106) from the Ministry of Environment of Japan. (K2106)

摘要: The effect of oxidation pretreatment temperature (500~1 000 ℃) on the catalytic activity of Kovar applied on hydrocarbon CO2 reforming was examined. Catalytic performance evaluation using tetradecane at 800 ℃ with 70 μmol/s CO2 revealed 700 and 1 000 ℃ as the best pre-oxidation temperature in producing CO and H2, respectively. XRD and SEM-EDX analyses showed that a separate metal oxide layer composed of iron oxide (Fe2O3 and F3O4), nickel, cobalt, and possibly their respective oxides started to form when oxidation was conducted at 700 ℃ or higher.The presence of iron enhanced the stability of nickel in the structure while the compact structure of Fe3O4 resulted into the formation of a thick and rigid metal oxide layer on the surface of the Kovar tube. The strong physical bond between the metal oxide layer and Kovar tube provided the catalyst good mechanical strength and consequently good catalytic activity.

English

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  • 收稿日期:  2014-03-07
  • 网络出版日期:  2014-03-21
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