TY - JOUR
T1 - Hydrogenation of sunflower oil over platinum supported on silica catalysts
T2 - Preparation, characterisation and catalytic activity
AU - McArdle, Shane
AU - Curtin, Teresa
AU - Leahy, J. J.
PY - 2010/7/15
Y1 - 2010/7/15
N2 - The effect of varying the Pt content (0.7 - 4.6 wt %) over a novel mesoporous SiO2 support was investigated for hydrogenation of sunflower oil. The reaction was carried out in a batch reactor at 170 °C, 400 rpm and 3 bar hydrogen pressure. The activity and selectivity of the different catalysts to trans fatty acid formation were compared. The choice of metal precursor affected the catalyst activity, H2PtCl6 showed a moderate increase of the Pt activity compared to Pt(AcAc)2. The presence of chlorine on a supported catalyst is believed to give rise to improved hydrogen spillover, which in turn may improve the hydrogenation activity. For the catalysts prepared using Pt(AcAc)2, the activity improved with increased Pt loading up to 1.5%Pt, above which no significant increase in activity was observed with additional Pt loading. Additionally, it was found that the activity per exposed metal was greater at lower Pt loadings. The amount of Pt supported on the silica was shown to influence the selectivity to transC18:1. Increasing the Pt loading from 0.7% to 4.6% correspondingly decreased the metal dispersion and increased the metal particle size. The smaller particles on the 0.7%Pt/SiO2, 1.5%Pt/SiO2 and the 2.7%Pt/SiO2 catalysts presented a lower trans content compared to the 4.6%Pt/SiO2 catalyst that exhibited larger particles.
AB - The effect of varying the Pt content (0.7 - 4.6 wt %) over a novel mesoporous SiO2 support was investigated for hydrogenation of sunflower oil. The reaction was carried out in a batch reactor at 170 °C, 400 rpm and 3 bar hydrogen pressure. The activity and selectivity of the different catalysts to trans fatty acid formation were compared. The choice of metal precursor affected the catalyst activity, H2PtCl6 showed a moderate increase of the Pt activity compared to Pt(AcAc)2. The presence of chlorine on a supported catalyst is believed to give rise to improved hydrogen spillover, which in turn may improve the hydrogenation activity. For the catalysts prepared using Pt(AcAc)2, the activity improved with increased Pt loading up to 1.5%Pt, above which no significant increase in activity was observed with additional Pt loading. Additionally, it was found that the activity per exposed metal was greater at lower Pt loadings. The amount of Pt supported on the silica was shown to influence the selectivity to transC18:1. Increasing the Pt loading from 0.7% to 4.6% correspondingly decreased the metal dispersion and increased the metal particle size. The smaller particles on the 0.7%Pt/SiO2, 1.5%Pt/SiO2 and the 2.7%Pt/SiO2 catalysts presented a lower trans content compared to the 4.6%Pt/SiO2 catalyst that exhibited larger particles.
KW - Hydrogenation of sunflower oil
KW - Pt supported on silica
KW - Trans fatty acids
UR - http://www.scopus.com/inward/record.url?scp=77953649660&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2010.05.018
DO - 10.1016/j.apcata.2010.05.018
M3 - Article
AN - SCOPUS:77953649660
SN - 0926-860X
VL - 382
SP - 332
EP - 338
JO - Applied Catalysis A, General
JF - Applied Catalysis A, General
IS - 2
ER -