Preparation of active MgO by short-time thermal decomposition of Mg(OH)2

Preparation of active MgO by short-time thermal decomposition of Mg(OH)2 In the preparation of MgO, Mg(OH)2 was placed in a muffle furnace maintained at a desired temperature for rapid increase to the activation temperature and for short-time heating. The MgO obtained showed a higher activity for the retro-aldol reaction of diacetone alcohol and larger surface area in comparison with that prepared by conventional procedures. Among the prepared catalysts, MgO heated at 673 K for 20 min showed the highest activity. The prepared MgO has a wide and thin plate shape with a small crystal size. The surface area of MgO decreased monotonously with increase in heating time and temperature. Further thermal treatment produced a decrease in catalytic activity. After that, the activity was regenerated by a long-time thermal treatment. The change in crystal morphology and exposed surface crystal plane of MgO by thermal treatment is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Preparation of active MgO by short-time thermal decomposition of Mg(OH)2

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Publisher
Springer Netherlands
Copyright
Copyright © 2015 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-015-1971-z
Publisher site
See Article on Publisher Site

Abstract

In the preparation of MgO, Mg(OH)2 was placed in a muffle furnace maintained at a desired temperature for rapid increase to the activation temperature and for short-time heating. The MgO obtained showed a higher activity for the retro-aldol reaction of diacetone alcohol and larger surface area in comparison with that prepared by conventional procedures. Among the prepared catalysts, MgO heated at 673 K for 20 min showed the highest activity. The prepared MgO has a wide and thin plate shape with a small crystal size. The surface area of MgO decreased monotonously with increase in heating time and temperature. Further thermal treatment produced a decrease in catalytic activity. After that, the activity was regenerated by a long-time thermal treatment. The change in crystal morphology and exposed surface crystal plane of MgO by thermal treatment is discussed.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Mar 11, 2015

References

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