Open AccessOxidative Dehydrogenation of n‐Butane over LaV Catalysts Supported on TiO2
Author(s) -
Le Minh Cam,
Ngo Duc Huyen,
Nguyễn Ngọc Hà
Publication year - 2013
Publication title -
journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.436
H-Index - 50
eISSN - 2090-9063
pISSN - 2090-9071
DOI - 10.1155/2013/868906
Subject(s) - dehydrogenation , chemistry , catalysis , butane , selectivity , dispersion (optics) , doping , nuclear chemistry , inorganic chemistry , oxidative phosphorylation , organic chemistry , biochemistry , physics , optoelectronics , optics
The catalytic performance of vanadia catalysts with 15 wt% V supported on TiO2 and (15 wt% V + 4.6 wt% La) supported on TiO2 in oxidative dehydrogenation (ODH) of n-butane was investigated. The catalysts were characterized by means of TPD-NH3, TPR-H2, UV-Vis, and BET. Testing of samples showed that vanadia catalysts were active for the reaction. It was found that La doping of V/TiO2 catalyst had a negative effect on the dispersion of V species and led to formation of V2O5 clusters. This resulted in a loss of activity. Although slight improvement of selectivity was observed in comparison to undoped V/TiO2 samples due to lower acidity of La-doped –V/TiO2, this could not compensate the loss of activity and finally did not lead to higher butene yields
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