An article in Bioresource Technology (Influence of Vegetable Oils Fatty-Acid Composition on Biodiesel Optimization, (2011, Vol. 102(2),

An article in Bioresource Technology (€œInfluence of Vegetable Oils Fatty-Acid Composition on Biodiesel Optimization,€ (2011, Vol. 102(2), pp. 1059€“1065)] described an experiment to analyze the influence of the fatty-acid composition on biodiesel. Factors were the concentration of catalyst, amount of methanol, reaction temperature and time, and the design included three center points. Maize oil methyl ester (MME) was recorded as the response. Data follow.

(a) Identify the important effects from a normal probability plot.

(b) Compare the results in the previous part with results that use an error term based on the center points.

(c) Test for curvature.

(d) Analyze the residuals from the model.

Transcribed Image Text:

Run Temperature Time Catalyst Methanol to oil molar ratio MME (min) (wt.%) (C) (wt. %) 0.8 1.2 1 45 40 5.4 88.30 25 45 40 10 5.4 4.2 90.50 77.96 0.8 3 25 45 10 40 10 1.2 1.2 5.4 5.4 85.59 97.14 4 45 45 1.2 1.2 4.2 4.2 90.64 89.86 40 25 25 40 10 40 0.8 0.8 4.2 5.4 82.35 80.31 10 25 25 0.8 0.8 5.4 4.2 4.2 85.51 76.21 11 10 12 45 25 40 10 0.8 1.2 86.86 86.35 13 4.2 14 45 25 10 0.8 1.2 5.4 4.2 84.58 89.37 15 16 45 35 10 25 1.2 1 5.4 4.8 90.51 91.40 17 35 35 18 25 25 1 4.8 4.8 91.96 19 91.07