Volume 46 Issue 11
Nov.  2018
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LI Si-xuan, XIA Lei, LI Jing-yu, LIU Xiao-gang, SUN Jin-ru, WANG Hong, CHI Yao-ling, LI Cui-qing, SONG Yong-ji. Effect of alkaline earth metal doping on the catalytic performance of cobalt-based spinel composite metal oxides in N2O decomposition[J]. Journal of Fuel Chemistry and Technology, 2018, 46(11): 1377-1385.
Citation: LI Si-xuan, XIA Lei, LI Jing-yu, LIU Xiao-gang, SUN Jin-ru, WANG Hong, CHI Yao-ling, LI Cui-qing, SONG Yong-ji. Effect of alkaline earth metal doping on the catalytic performance of cobalt-based spinel composite metal oxides in N2O decomposition[J]. Journal of Fuel Chemistry and Technology, 2018, 46(11): 1377-1385.

Effect of alkaline earth metal doping on the catalytic performance of cobalt-based spinel composite metal oxides in N2O decomposition

Funds:

the National Natural Science Foundation of China 21343009

the National Natural Science Foundation of China U1662103

the National Natural Science Foundation of China 2167329

the Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology BZ041420180007

the Beijing College Students Innovation and Entrepreneurship Training Program 2018J00035

  • Received Date: 2018-07-16
  • Rev Recd Date: 2018-08-23
  • Available Online: 2021-01-23
  • Publish Date: 2018-11-10
  • A series of cobalt-based spinel composite metal oxides doped with alkaline earth metals, viz., MxCo3-xO4 (M=Mg, Ca, Sr and Ba; x=0, 0.1, 0.3, 0.5, 0.7 and 0.9), were prepared by the coprecipitation method and characterized by XRD, SEM, nitrogen sorption, H2-TPR, O2-TPD-MS and XPS; the effect of alkaline earth metal doping on the catalytic performance of MxCo3-xO4 composites in N2O decomposition was investigated in a fixed bed micro-reactor. The results showed that after doping with the alkaline earth metals, the particle size of MxCo3-xO4 catalysts is decreased, accompanying with an increase in the specific surface area and the amount of surface adsorbed oxygen and Co2+ species. Meanwhile, the redox performance and catalytic activity of MxCo3-xO4 in N2O decomposition are also greatly enhanced. Under the conditions of 0.68% N2O, 3% O2 and Ar as balance gas, the Sr0.7Co2.3O4 catalyst doped with Sr (x=0.7) exhibits highest activity in N2O decomposition; the reaction temperatures where the N2O conversion reaches 10% and 95% are as low as 312 and 451℃, respectively.
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