Characterization of Co,Al-MCM-41 and its activity in the t-butylation of phenol using isobutanol

Karthik, M., Tripathi, A. K., Gupta, N. M., Vinu, A., Hartmann, M., Palanichamy, M. and Murugesan, V. (2004) Characterization of Co,Al-MCM-41 and its activity in the t-butylation of phenol using isobutanol. Applied Catalysis A-General, 268 1-2: 139-149. doi:10.1016/j.apcata.2004.03.028


Author Karthik, M.
Tripathi, A. K.
Gupta, N. M.
Vinu, A.
Hartmann, M.
Palanichamy, M.
Murugesan, V.
Title Characterization of Co,Al-MCM-41 and its activity in the t-butylation of phenol using isobutanol
Journal name Applied Catalysis A-General   Check publisher's open access policy
ISSN 0926-860X
1873-3875
Publication date 2004-08
Sub-type Article (original research)
DOI 10.1016/j.apcata.2004.03.028
Volume 268
Issue 1-2
Start page 139
End page 149
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Co,Al-MCM-41 catalysts with various n Si/(n Co+n Al) ratios were synthesized and extensively characterized by low-angle XRD, TGA/DTG, BET, AAS, DRIFT, UV-Vis DRS and ESR. UV-Vis DRS and ESR studies reveal that cobalt in Co,Al-MCM-41 is highly symmetrical and occurs in tetrahedral coordination. Some of the cobalt atoms are transformed into the cobalt oxide form when n Si/(n Co+n Al) is increased to 20. t-Butylation of phenol with isobutanol was studied in the vapor phase as a model reaction at temperatures between 200 and 500°C. The products obtained were O-tert-butyl phenol (OTBP), 2-tert-butyl phenol (2TBP) and 4-tert butyl phenol (4TBP). O-Butenyl phenol (OBP) and 2-butenyl phenol (2BP) were also observed along with normal alkylated products. The phenol conversion drastically increased with temperature over all the catalysts. The activity of the catalysts followed the order of Co,Al-MCM-41 (20) > Co,Al-MCM-41 (50) > Co,Al-MCM-41 (80) > Al-MCM-41 (23). The influences of various parameters such as temperature, reactant feed ratio and feed rate, time on stream on conversion and products selectivity were studied and the salient results are discussed.
Keyword Mesoporous materials
Co,Al-MCM-41
t-butylation
Phenol
Isobutanol
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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