Table 3 Experimental and predicted test matrix using CCD for CSLB preparation.

From: Optimization of cashew nut shell biodiesel production with industrial waste catalysts and butanol additives for ecofriendly CRDI engine applications

Std. order

Run order

MR: methanol/CSL molar ratio

PT: process temperature (°C)

IC: industrial catalyst (wt%)

CSLB yield (%)

Experimental value

Predicted value

Residual

20

1

15

70

4

84.20

81.84

1.3

19

2

15

70

4

83.10

81.84

-0.2

14

3

15

70

6

82.40

85.19

1.37

10

4

20

70

4

85.30

85.54

-0.28

9

5

10

70

4

73.60

72.68

1.4

12

6

15

80

4

65.50

68.27

1.44

8

7

15

80

6

72.90

70.17

-0.5

1

8

10

60

2

39.30

39.58

-0.82

11

9

15

60

4

63.80

65.37

1.3

3

10

10

80

2

48.50

48.31

1.26

7

11

10

80

6

63.50

64.53

-1.11

2

12

20

60

2

60.20

59.45

-1.85

16

13

15

70

4

81.10

81.84

-2.3

15

14

15

70

4

82.40

81.84

-0.7

18

15

15

70

4

83.00

81.84

1.42

6

16

20

60

6

74.20

73.30

-0.97

4

17

20

80

2

63.20

62.31

-1.3

5

18

10

60

6

61.80

61.60

-0.5

13

19

15

70

2

68.60

70.15

1.5

17

20

15

70

4

80.90

81.84

-2.5

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