Page 421 - Advances in Eco-Fuels for a Sustainable Environment

374 Advances in Eco-Fuels for a Sustainable Environment

Table 13.8 ANOVA table for CCD model

Degree
Sum of of Mean
Prop>F
Source squares freedom square F value
Model 1116.36 20 55.82 45.75 <0.0001 Significant
A-Temperature 154.97 1 154.94 127.03 <0.0001 Significant
B-Time 76.88 1 76.88 63.02 <0.0001 Significant
C-Molar ratio 243.13 1 243.13 199.29 <0.0001 Significant
D-Catalyst 9.18 1 9.18 7.52 0.0191 Significant
concentration
E-Speed 31.44 1 31.44 26.5 0.0003 Significant
AB 33.66 1 33.66 27.59 0.0003 Significant
AC 11.66 1 11.66 9.57 0.0102 Significant
AD 0.90 1 0.90 0.74 0.4092 Not
Significant
AE 6.37 1 6.37 5.22 0.0431 Significant
BC 6.16 1 6.16 5.05 0.0461 Significant
BD 36.00 1 36.00 29.51 0.0002 Significant
BE 0.16 1 0.16 0.13 0.7220 Not
Significant
CD 16.71 1 16.71 13.70 0.0035 Significant
CE 146.40 1 146.40 120.01 <0.0001 Significant
DE 35.44 1 35.44 29.05 0.0002 Significant
A2 0.018 1 0.018 0.015 0.9045 Not
Significant
B2 27.77 1 27.77 22.76 0.0006 Significant
C2 9.96 1 9.96 8.16 0.0156 Significant
D2 20.41 1 20.41 16.73 0.0018 Significant
E2 4.84 1 4.84 3.96 0.0719 Significant
Lack of fit 12.56 10 1.26 1.46 0.5722 Not
Significant
Pure error 0.86 1 0.86

speed but increased with an increase in stirrer speed. Increasing stirrer speed improved
the volatility of alcohol, which acts as a medium in the transesterification reaction.
Higher stirrer speed enhanced the mixing intensity of oil and alcohol, which resulted
in maximum biodiesel yield as compared to lower stirrer speed [43].

13.3.3 Performance, emission, and combustion characteristics
of biodiesel-diesel-alcohol blends
Fig. 13.7 shows the brake thermal efficiency (BTE) with respect to fuel injection
timing (FIT) and nozzle opening pressure (NOP) for a biodiesel-diesel-alcohol blend.
Fig. 13.7 shows that BTE is increased with n increase in NOP from 200 to 500bar and