Skip to main content

Table 2 Experiment matrix of factorial design and the response obtained for conversion, selectivity, and viscosity

From: Production of a biodiesel-like biofuel without glycerol generation, by using Novozym 435, an immobilized Candida antarctica lipase

Run

Parameters

 

Temperature

Oil/ethanol ratio

pH

Conversion (%)

Selectivity (%)

Kinematic viscosity (mm2s−1)

1

1

−1

0

81.4

45.99

20.3

2

1

−1

−1

84.6

46.1

21.3

3

0

−1

−1

78.6

29.2

21.0

4

−1

−1

0

59.1

11.7

20.8

5

−1

1

1

100

40.4

13.3

6

1

1

1

100

39.6

22.3

7

−1

−1

−1

63.6

23.3

22.1

8

0

−1

1

89.5

34.1

19.0

9

0

1

0

95.7

31.4

15.2

10

0

−1

0

100

44.2

20.1

11

0

1

1

95.2

37.5

15.7

12

1

−1

1

100

72.5

18.6

13

1

1

−1

100

46.6

18.2

14

1

1

0

86.1

36.1

19.8

15

−1

1

0

94.9

46.8

13.4

16

−1

1

−1

100

70.9

10.8

17

0

1

−1

100

52.6

12.5

18

−1

−1

1

77.5

17.8

20.2

Repeated experiments

19

0

−1

0

100

43.4

22.5

20

−1

1

1

100

39.7

13.2

21

−1

−1

−1

64.4

22.6

20.1

22

−1

1

0

95.8

46.1

13.4

23

1

1

−1

100

47.5

16.2

24

0

1

−1

100

51.9

14.5

25

−1

1

−1

100

69.6

10.9

26

0

1

0

96.5

36.5

14.6

27

1

1

1

100

38.8

22.2

28

0

−1

−1

80.1

28.6

19.0

29

1

−1

1

100

71.4

18.5

30

−1

−1

0

60.2

11.0

20.3

31

1

−1

0

82.2

45.2

20.3

32

1

1

0

86.9

33.4

19.5

33

0

−1

1

90.3

33.4

18.1

34

0

1

1

97.0

36.8

15.1

35

1

−1

−1

85.4

43.4

21.6

36

−1

−1

1

69.7

16.3

20.6