Abstract
VOx/MgO aerogel catalysts were synthesized using three different preparation methods: by mixing the aerogel MgO support with dry ammonium vanadate, by vanadium deposition from a precursor solution in toluene, and by hydrolysis of a mixture of vanadium and magnesium alkoxides followed by co-gelation and supercritical drying. The latter aerogel technique allowed us to synthesize mixed vanadium-magnesium hydroxides with the surface areas exceeding 1300 m2/g. The synthesized catalysts were studied by a number of physicochemical methods (XRD, Raman spectroscopy, XANES and TEM). A common feature of all synthesized samples is the lack of V2O5 phase. In all cases vanadium was found to be a part of a surface mixed V-Mg oxide (magnesium vanadate), its structure depending on the synthesis method. The VOx/MgO mixed aerogel sample had the highest surface area 340 m2/g, showed higher catalytic activity and selectivity in oxidative dehydrogenation of propane compared to the catalysts prepared by impregnation and dry mixing. The addition of iodine vapor to the feed in 0.1-0.25 vol.% concentrations was found to increase to propylene yield by 40-70%.
| Original language | English |
|---|---|
| Pages (from-to) | 278-284 |
| Number of pages | 7 |
| Journal | Catalysis Today |
| Volume | 144 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 30 Jun 2009 |
| Externally published | Yes |
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Keywords
- Aerogels
- Iodine
- Magnesium oxide
- Nanoparticles
- Oxidative dehydrogenation
- Propane
- Propene
- Vanadium
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
Cite this
Aerogel VOx/MgO catalysts for oxidative dehydrogenation of propane. / Mishakov, Ilya V.; Vedyagin, Aleksey A.; Bedilo, Alexander F.; Zaikovskii, Vladimir I.; Klabunde, Kenneth J.
In: Catalysis Today, Vol. 144, No. 3-4, 30.06.2009, p. 278-284.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Aerogel VOx/MgO catalysts for oxidative dehydrogenation of propane
AU - Mishakov, Ilya V.
AU - Vedyagin, Aleksey A.
AU - Bedilo, Alexander F.
AU - Zaikovskii, Vladimir I.
AU - Klabunde, Kenneth J.
PY - 2009/6/30
Y1 - 2009/6/30
N2 - VOx/MgO aerogel catalysts were synthesized using three different preparation methods: by mixing the aerogel MgO support with dry ammonium vanadate, by vanadium deposition from a precursor solution in toluene, and by hydrolysis of a mixture of vanadium and magnesium alkoxides followed by co-gelation and supercritical drying. The latter aerogel technique allowed us to synthesize mixed vanadium-magnesium hydroxides with the surface areas exceeding 1300 m2/g. The synthesized catalysts were studied by a number of physicochemical methods (XRD, Raman spectroscopy, XANES and TEM). A common feature of all synthesized samples is the lack of V2O5 phase. In all cases vanadium was found to be a part of a surface mixed V-Mg oxide (magnesium vanadate), its structure depending on the synthesis method. The VOx/MgO mixed aerogel sample had the highest surface area 340 m2/g, showed higher catalytic activity and selectivity in oxidative dehydrogenation of propane compared to the catalysts prepared by impregnation and dry mixing. The addition of iodine vapor to the feed in 0.1-0.25 vol.% concentrations was found to increase to propylene yield by 40-70%.
AB - VOx/MgO aerogel catalysts were synthesized using three different preparation methods: by mixing the aerogel MgO support with dry ammonium vanadate, by vanadium deposition from a precursor solution in toluene, and by hydrolysis of a mixture of vanadium and magnesium alkoxides followed by co-gelation and supercritical drying. The latter aerogel technique allowed us to synthesize mixed vanadium-magnesium hydroxides with the surface areas exceeding 1300 m2/g. The synthesized catalysts were studied by a number of physicochemical methods (XRD, Raman spectroscopy, XANES and TEM). A common feature of all synthesized samples is the lack of V2O5 phase. In all cases vanadium was found to be a part of a surface mixed V-Mg oxide (magnesium vanadate), its structure depending on the synthesis method. The VOx/MgO mixed aerogel sample had the highest surface area 340 m2/g, showed higher catalytic activity and selectivity in oxidative dehydrogenation of propane compared to the catalysts prepared by impregnation and dry mixing. The addition of iodine vapor to the feed in 0.1-0.25 vol.% concentrations was found to increase to propylene yield by 40-70%.
KW - Aerogels
KW - Iodine
KW - Magnesium oxide
KW - Nanoparticles
KW - Oxidative dehydrogenation
KW - Propane
KW - Propene
KW - Vanadium
UR - http://www.scopus.com/inward/record.url?scp=66349106327&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=66349106327&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2009.01.018
DO - 10.1016/j.cattod.2009.01.018
M3 - Article
AN - SCOPUS:66349106327
VL - 144
SP - 278
EP - 284
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
IS - 3-4
ER -