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Table 2 Experimental plan and results (FAMEs release) from testing acid, NaOH addition, and NaOH excess additions

From: Combining phospholipases and a liquid lipase for one-step biodiesel production using crude oils

Pattern

Variables

Response

 

X1 (acid)

NaOH (eqv)

Extra NaOH (ppm)

FAMEs (%)

212

Phosphoric acid

1

10

84.3

132

Citric acid

2

10

67.8

222

Phosphoric acid

1.5

10

83.9

131

Citric acid

2

0

67.1

232

Phosphoric acid

2

10

84.7

211

Phosphoric acid

1

0

78.8

231

Phosphoric acid

2

0

77.6

112

Citric acid

1

10

67.0

121

Citric acid

1.5

0

77.3

221

Phosphoric acid

1.5

0

79.5

122

Citric acid

1.5

10

53.6

213

Phosphoric acid

1

20

91.1

113

Citric acid

1

20

51.3

111

Citric acid

1

0

43.5

133

Citric acid

2

20

71.1

123

Citric acid

1.5

20

82.2

223

Phosphoric acid

1.5

20

85.6

233

Phosphoric acid

2

20

79.5