OP-II-3

OP-III-A-12301.0argon5 vol% hydrogen in argonConversion of ethyl stearate (%)252015105Semi-batchBatchMolar fraction0.80.60.40.200 60 120 180 240 300Reaction time (min)0.00 500 1000 1500 2000 2500Time-on-stream (min)a) b)Fig. 1. a) Conversion of ethyl stearate as a function of the reaction time in batch andsemibatch reactors by using the initial concentration of ethyl stearate 1.6 mol/l, 1 g of 5 wt.%Pd/C, temperature 300˚C, pressure 17 bar using 5 vol.% H 2 in Ar, b) Kinetics of the stearicacid deoxygenation in the trickle bed reactor over 1 wt.% Pd/C (Sibunit) at 360 o C and 10 bar;under Ar for the first 1350 min and thereafter under 5% H 2 in Ar. Notation: (—) stearic acid,() n-heptadecane and (•) n-heptadecene. The concentration of neat stearic acid was4.4 mol/l, Ar flow was 10 ml/min and the reactant flow was 0.075 ml/min.The continuous downflow trickle bed reactor together with the cocurrent carriergas flow was applied for deoxygenation of neat stearic acid at 360°C under 10 bar ofAr over a mesoporous Pd/C(Sibunit). A stable conversion (17%) of stearic acid wasachieved during 2700 min time-on-stream (Fig. 1b). In the final work, several casestudies from catalytic deoxygenation of fatty acids from C12-C23 and theirderivatives using different reactors, reactants and catalysts are discussed and theresults from the reactor modeling and quantification of the catalyst deactivation willbe presented.174