K Addition Effect of Co3O4-based Catalyst for N2O Decomposition 


Vol. 24,  No. 1, pp. 35-40, Mar.  2018
10.7464/ksct.2018.24.1.035


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  Abstract

Co3O4 catalysts for N2O decomposition were prepared by co-precipitation method. Ce and Zr were added during the preparation of the catalyst as promoter with the molar ratio (Ce or Zr) / Co = 0.05. Also, 1 wt% K2CO3 was doped to the prepared catalyst with impregnation method to investigate the effect of K on the catalyst performance. The prepared catalysts were characterized with SEM, BET, XRD, XPS and H2-TPR. The Co3O4 catalyst exhibited a spinel crystal phase, and the addition of the promoter increased the specific surface area and reduced the particle and crystal size. It was confirmed that the doping of K improves the catalytic activity by increasing the concentration of Co2+ in the catalyst which is an active site for catalytic reaction. The catalytic activity tests were carried out at a GHSV of 45,000 h-1 and a temperature range of 250 ~ 375 ℃. The K-impregnated Co3O4 catalyst showed much higher activity than Co3O4 catalysts with promoter only. It is found that the K-impregnation increased the concentration of Co2+ more than the added of promoter did, and lowered the reduction temperature to a great extent.

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  Cite this article

[IEEE Style]

H. RH, P. JH, B. JH, I. HB, Y. KB, "K Addition Effect of Co3O4-based Catalyst for N2O Decomposition," Clean Technology, vol. 24, no. 1, pp. 35-40, 2018. DOI: 10.7464/ksct.2018.24.1.035.

[ACM Style]

Hwang RH, Park JH, Baek JH, Im HB, and Yi KB. 2018. K Addition Effect of Co3O4-based Catalyst for N2O Decomposition. Clean Technology, 24, 1, (2018), 35-40. DOI: 10.7464/ksct.2018.24.1.035.

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pISSN : 1598 - 9712
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