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Citation: Jiang Zheng, Hou Hong-Xia, Hao Zheng-Ping, Kang Shou-Fang, Li Jin-Jun, Hu Chun. Effects of La Incorporation in Ba₁_－xLa_xFeAl₁₁O₁₉_－_δ on the Performance of Methane Catalytic Combustion[J]. Acta Physico-Chimica Sinica, ;2004, 20(11): 1313-1319. doi: 10.3866/PKU.WHXB20041106 shu

Effects of La Incorporation in Ba₁_－xLa_xFeAl₁₁O₁₉_－_δ on the Performance of Methane Catalytic Combustion

1.

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085

Received Date: 11 May 2004
Available Online: 15 November 2004

Series of Ba1－xLaxFeAl11O19－δ hexaaluminate catalysts were prepared by (NH4)2CO3 co-precipitation method and their performance for methane catalytic combustion was studied. The obtained materials were characterized by XRD, Diffuse UV-Vis, FT-IR, TPR, and N2 BET techniques. The results showed that partial substitution of Ba with La in Fe-hexaaluminates could enhance catalytic activity for methane combustion, and the optimal catalyst was Ba0.2La0.8FeAl11O19－δ hexaaluminate, whose light-off temperature was as low as 495 ℃ denoted by 10％ conversion of methane (VCH4/VO2/VN2=1/4/95). XRD and SEM characterization indicated that the samples formed well-defined hexaaluminate phase after calcination at 1 200 ℃ for 5 h, and the dopant of La could promote the formation of hexaaluminate phases. UV-Vis-DR characterization revealed that the oxide state of Fe is ＋3 in Ba1－xLaxFeAl11O19－δcatalysts. The synergism between Ba, La and Fe was observed based on the results of UV-VisDR, FT-IR and TPR.
- La-doped; Fe-substituted Ba (La) hexaaluminate; Catalytic combustion of methane; Synergism
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effects of La Incorporation in Ba1－xLaxFeAl11O19－δ on the Performance of Methane Catalytic Combustion

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通讯作者: 陈斌, bchen63@163.com

Effects of La Incorporation in Ba₁_－xLa_xFeAl₁₁O₁₉_－_δ on the Performance of Methane Catalytic Combustion