Untitled

Partial hydrogenation of sunflower oil in a membrane reactor

“…2). The aim of this study was to reduce the level of trans fatty acid below 5% (a level consistent for butter [9]) and the level of stearic acid below 10% through hydrogenation. This means selective hydrogenation of linoleic acid to oleic acid by suppressing the complete hydrogenation to stearic acid and the trans-isomerization to elaidic acid.…”

“…11). This is unexpected as in literature it is described that low reaction temperatures suppress trans fatty acids formation [9,[19][20][21]. In our experiments up to a C18:2-conversion of 45% there is not much difference in the trans and stearic acid content of the reaction runs at different temperatures in the membrane reactor.…”

“…Most of them describe new catalyst development and modification [2,[6][7][8]. Some investigators study the hydrogenation process under supercritical conditions [9,10]. Mathematical models were developed in order to predict the formation of trans-isomers and unsaturated fatty acid changes during vegetable oil hydrogenation [11,12].…”

Catalytic hydrogenation of CC and CO in unsaturated fatty acid methyl esters

“…It was found that cis-trans isomerization during partial hydrogenation of FAMEs on a Pd catalyst could be relieved by controlling the reaction conditions. For instance, under supercritical or nearcritical conditions of propane, a relatively low trans-fatty acid content below 5% was obtained using a 3% Pd/aminopolysiloxane catalyst 72 or a 2% Pd/C catalyst. 73 The higher abundance of H 2 on the catalyst surface was claimed to be the main reason for the lower production of trans species.…”

Triacylglycerol analysis of partially hydrogenated vegetable oils by silver ion HPLC

“…Therefore the aim of the work presented here was to develop a gradient for the analysis of both native and hardened oils. An additional demand was that the method should give reliable results for extremely small samples (up to 1 mg) because the hydrogenation experiments were conducted in a small-scale continuous flow reactor [14]. Since they are being used in hydrogenation studies at the department, we concentrated on palm and rapeseed oil.…”