5 Principle and Processing of Biodiesel Production
149
Table 5.5 Orthogonal experiment and range analysis on five factors affecting transesterification
Number
Factor
Temperature Amount of
catalyst
wt%
Reactant
ratio
Reaction
time (min)
Stirring
speed
Yield
(%)
A
B
C
D
E
1
50
0.8
1:4
10
1
82.1
2
50
1.0
1:5
20
2
93.4
3
50
1.2
1:6
30
3
94.5
4
50
1.4
1:7
40
4
97.0
5
60
0.8
1:5
30
4
90.4
6
60
1.0
1:4
40
3
90.2
7
60
1.2
1:7
10
2
92.1
8
60
1.4
1:6
20
1
91.6
9
70
0.8
1:6
40
2
92.1
10
70
1.0
1:7
30
1
90.4
11
70
1.2
1:4
20
4
96.0
12
70
1.4
1:5
10
3
94.9
13
80
0.8
1:7
20
3
92.6
14
80
1.0
1:6
10
4
92.6
15
80
1.2
1:5
40
1
91.1
16
80
1.4
1:4
30
2
90.1
K 1j
367.0
357.2
358.4
361.7
355.2
T =
16
i=1
y i =
1471.1
K 2j
364.3
366.6
369.8
373.6
367.7
K 3j
373.4
373.7
370.8
365.4
372.2
K 4j
366.4
373.6
372.1
370.4
376.0
K 1j
91.8
89.3
89.6
90.4
88.8
y = 91.9
K 2j
91.1
91.7
92.5
93.4
91.9
K 3j
93.4
93.4
92.7
91.4
93.1
K 4j
91.6
93.4
93.0
92.6
94.0
MAX
373.4
373.7
372.1
373.6
376.0
MIN
364.3
357.2
358.4
361.7
355.2
R j
9.1
16.5
13.7
11.9
20.8
Data source East China University of Science and Technology
and 30 min. As to reaction temperature that has the least influence on the yield, it
should preferably be maintained at 50–60 °C to reduce cost.