Preparation and catalytic property of high surface area mixed oxides from calcination of MgCuCr- and MgCuAl-layered double hydroxides

Authors

  • W. Trakarnpruk Dept. of Chemistry, Faculty of Science, Chulalongkorn University

Abstract

In this research work layered double hydroxides (LDHs) containing Mg, Cu and Cr(or Al) have been prepared with starting Mg:Cu:Cr (or Al) molar ratio of 2:1:1. They were calcined at 500 ?C for 5 h to convert into corresponding mixed oxides possessing high surface area. The catalysts were characterized by chemical analysis (ICP), infrared spectroscopy (FTIR), thermal analysis (TGA/DTA), powder X-ray diffraction (XRD), surface area measurements and H2 temperature programmed reduction (TPR). Catalytic property of these mixed oxides catalysts were tested in the oxidation of ethylbenzene using tert-butylhydroperoxide as an oxidant without added solvent. The experimental results show that high conversion of ethylbenzene and selectivity to acetophenone can be obtained. The MgCuAl oxide shower higher selectivity to acetophenone (95%) whereas the MgCuCr oxide displayed higher activity (88% conversion). The difference in catalytic performance is due to type of metal in the material. The catalysts could be reused at least 3 times without signi?cant loss in activity.

Downloads

Download data is not yet available.

Author Biography

W. Trakarnpruk, Dept. of Chemistry, Faculty of Science, Chulalongkorn University

Assoc. Professor Dr. Wimonrat Trakarnpruk

Dept. of Chemistry, Faculty of Science, Chulalongkorn University

Downloads

Published

2012-12-23

How to Cite

[1]
W. Trakarnpruk, “Preparation and catalytic property of high surface area mixed oxides from calcination of MgCuCr- and MgCuAl-layered double hydroxides”, J Met Mater Miner, vol. 22, no. 2, Dec. 2012.

Issue

Vol. 22 No. 2 (2012)

Section

Original Research Articles

License

Authors who publish in this journal agree to the following terms:

    1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.

 

    1. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.