The effect of cerium incorporation on the catalytic performance of cobalt and manganese containing layer double oxides for acetone oxidation

• Abstract BACKGROUND Acetone is a volatile organic compound (VOC) that is often associated with poor air quality. Acetone has chronic toxicity towards humans and has significant impact to the overall atmospheric air quality. In this study, several layer double oxides (with M2+ = Mg, Ni, Co or Mn and M3+= Al or Ce)were tested as catalyst in acetone oxidation. RESULTS MnAl-LDO was found to be the most efficient catalyst. 50% acetone conversion was achieved at 170 °C (T50%) and 90% conversion at 200 °C (T90%).The incorporation of Ce on MnCeAl-LDO did not improve its catalytic properties over MnAl-LDO (the T50% for MnCeAl-LDO was 12 °C higher than for MnAl-LDO). The good performance on MnAl-LDO was due to the presence of Mn3+. MnAl-LDO was not affect when water was introduced into the catalytic reaction setup. Less than 5 % fluctuation in the acetone conversion rate at 170 and 200 °C was detected in the presence of 5.5% water. The incorporation of Ce on CoCeAl-LDO improved its catalytic performance over CoAl-LDO (T50% of CoCeAl-LDO was 15 °C lower than CoAl-LDO).Our results showed that the good catalytic performance of CoCeAl-LDO was ascribed to the increased Co2+/Co3+ ratio and the abundance of lattice oxygen (Olatt). CONCLUSION MnAl-LDO has good catalytic properties for acetone oxidation, even under humid conditions. The LDO catalysts tested here can be developed into efficient catalysts for acetone oxidation and serve as functional materials for the reduction in acetone or VOC emission. This article is protected by copyright. All rights reserved.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Annan kemiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)

Nyckelord

Hydrotalcite-derived oxides

Acetone

Catalytic oxidation

Active oxygen species

Low-temperature reduction

Engineering Science with specialization in Nanotechnology and Functional Materials

Teknisk fysik med inriktning mot nanoteknologi och funktionella material

Publikations- och innehållstyp

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