Seite - 206 - in Advanced Chemical Kinetics

5.1.Analysisof theeffectofcatalyst concentration The presence of catalyst helps to accelerate the reaction, reducing the activation energy required to start it. Thus, catalyst concentration is one of themain factors that can affect the reactionkinetics. In order to analyse the effect of the variation of the catalyst concentration, it is necessary to separatelyanalysedifferent rotationvalues. Foran initial concentrationofsoybeanoil equal to0.83molL 1andbytheEqs. (4)and(6), the consumptionof TAGandconversion into FAMEwere calculated. Thevelocity (υ)was calcu- latedaccording toEq. (5). Table1andFigure9disclose the results for the reactionswith200rpmof rotational speed. 0.2%and200rpm 1.5%and200rpm Time[min] XTAG [%] CTAG [molL 1] υ [ms 1] XTAG [%] CTAG [molL 1] υ [ms 1] 0 0 0.83 1428.1 0 0.83 1424.3 1 0.3 0.83 1385.7 8.3 0.75 1368.7 5 1.1 0.82 1355.8 71.5 0.24 1358.0 10 10.0 0.75 1347.9 81.6 0.15 1356.1 20 48.5 0.43 1353.2 82.5 0.15 1355.4 40 51.6 0.40 1355.2 83.4 0.14 1353.9 Table 1. Results for reactions at 200 rpm. Figure 9. Variation of (a) TAG concentration, (b) propagation velocity and (c) TAG conversion for the reactions with 200rpmof rotation. Advanced Chemical Kinetics206