Table 2. Biodiesel yield and quality from Sterculia foetida seed kernels
| Id | Yield based on seed (%) | Density (kg/m3) | Kinematic viscosity (mm2/s) | Acid number (mgKOH/g) | Saponification number (mgKOH/g) | Iodin value (mgI2/100 g) | Cetane value | Total glycerol (%) | Methyl ester content (%) |
| K1 | 24.6 ± 0 | 872.6 ± 0 | 4.16 ± 0.1 | 0.22 ± 0 | 227.69 ± 0 | 72.86 ± 0.9 | 53.84 ± 0.2 | 0.038 ± 0 | 99.6 ± 0 |
| K2 | 24.3 ± 1.7 | 853.77 ± 0 | 3 ± 0.1 | 0.45 ± 0.1 | 195.51 ± 6.3 | 84.63 ± 0.8 | 55.28 ± 0.2 | 0.052 ± 0 | 99.28 ± 0 |
| K3 | 23.9 ± 0.6 | 864.94 ± 0 | 4.48 ± 0.5 | 0.12 ± 0.2 | 219.37 ± 1 | 78.3 ± 1 | 53.56 ± 0.2 | 0.022 ± 0 | 99.76 ± 0.1 |
| K4 | 24.3 ± 0.4 | 856 ± 0 | 3.49 ± 0 | 0.21 ± 0.1 | 229.84 ± 2.4 | 92.1 ± 0.3 | 49.36 ± 0.1 | 0.046 ± 0 | 99.54 ± 0 |
| K5 | 24.2 ± 1 | 863.02 ± 0 | 3.99 ± 0.1 | 0.32 ± 0 | 228.3 ± 2 | 102.0 ± 0.5 | 47.19 ± 0.0 | 0.028 ± 0 | 99.45 ± 0.1 |
| K6 | 24.6 ± 2 | 852.36 ± 0 | 3.68 ± 0 | 0.04 ± 0 | 239.34 ± 3.9 | 74.09 ± 0.5 | 52.44 ± 0.2 | 0.044 ± 0 | 99.65 ± 0 |
| K7 | 23.8 ± 0.3 | 856.04 ± 0 | 4.14 ± 0 | 0.48 ± 0 | 247.09 ± 3 | 97.4 ± 0.2 | 46.47 ± 0 | 0.025 ± 0 | 99.62 ± 0.1 |
| K8 | 23.6 ± 0.1 | 839 ± 0 | 3.7 ± 0 | 0.48 ± 0.1 | 253.27 ± 3.9 | 87.95 ± 0.4 | 48.28 ± 0.1 | 0.046 ± 0 | 99.48 ± 0 |
| K9 | 23.8 ± 0 | 889.48 ± 0 | 4.3 ± 0.1 | 0.13 ± 0 | 224.13 ± 1.9 | 87.59 ± 0.7 | 51.02 ± 0.2 | 0.039 ± 0 | 99.63 ± 0 |
| K10 | 25.1 ± 0.2 | 871.9 ± 0 | 4.04 ± 0 | 0.49 ± 0.1 | 228.99 ± 3 | 80.9 ± 0.5 | 55.05 ± 0.1 | 0.029 ± 0 | 99.55 ± 0 |
| K11 | 24.6 ± 0.6 | 879.83 ± 0 | 3.35 ± 0.2 | 0.22 ± 0.2 | 218.01 ± 4.9 | 110.0 ± 0.7 | 46.49 ± 0.2 | 0.021 ± 0 | 99.72 ± 0.1 |
| K12 | 24.5 ± 0.2 | 884.33 ± 0 | 4.24 ± 0.3 | 0.36 ± 0.2 | 229.69 ± 2 | 88.39 ± 0.6 | 50.25 ± 0.1 | 0.04 ± 0 | 99.53 ± 0.1 |
| K13 | 24.8 ± 0.8 | 855.1 ± 0 | 4.53 ± 0.1 | 0.49 ± 0.1 | 239.17 ± 4.8 | 90.16 ± 0.7 | 51.12 ± 0.2 | 0.039 ± 0 | 99.49 ± 0.1 |
| K14 | 24.1 ± 0.4 | 851.34 ± 0 | 3.04 ± 0 | 0.33 ± 0.2 | 207.44 ± 4.2 | 83.02 ± 0.9 | 53.93 ± 0.2 | 0.023 ± 0 | 99.64 ± 0 |
| K15 | 25.4 ± 1.8 | 870.88 ± 0 | 4.21 ± 0.3 | 0.5 ± 0.1 | 211.92 ± 2.9 | 67.68 ± 0.7 | 53.74 ± 0.1 | 0.032 ± 0 | 99.47 ± 0.1 |
| K16 | 24.5 ± 0.2 | 869.33 ± 0.1 | 2.92 ± 0.2 | 0.17 ± 0.1 | 212.14 ± 1.7 | 69.54 ± 0.6 | 56.34 ± 0.2 | 0.015 ± 0 | 99.79 ± 0 |
| K17 | 24.4 ± 0.2 | 882.62 ± 0 | 2.58 ± 0.1 | 0.5 ± 0.1 | 197.87 ± 0 | 79.99 ± 0.5 | 55.63 ± 0.2 | 0.048 ± 0 | 99.31 ± 0.1 |
| K18 | 24.9 ± 0 | 881.6 ± 0 | 4.38 ± 0.1 | 0.46 ± 0.1 | 226.5 ± 1 | 92.22 ± 0.4 | 49.65 ± 0 | 0.022 ± 0 | 99.62 ± 0 |
| K19 | 24.1 ± 0.8 | 857.55 ± 0 | 3.21 ± 0.1 | 0.25 ± 0 | 224.21 ± 4.8 | 82.03 ± 0.9 | 52.19 ± 0.1 | 0.045 ± 0 | 99.52 ± 0 |
| K20 | 25.0 ± 1.4 | 872.6 ± 0.1 | 4.12 ± 0.1 | 0.43 ± 0 | 221.63 ± 3.9 | 81.49 ± 0.8 | 47.66 ± 0.2 | 0.038 ± 0 | 99.43 ± 0 |
| K21 | 26.0 ± 4.2 | 852.05 ± 0 | 3.28 ± 0.5 | 0.22 ± 0.1 | 233.86 ± 1 | 102.1 ± 0.8 | 46.68 ± 0.2 | 0.032 ± 0 | 99.66 ± 0 |
| K22 | 24.9 ± 0.8 | 889.74 ± 0 | 4.19 ± 0.4 | 0.5 ± 0.1 | 219.85 ± 1 | 78.96 ± 0.5 | 53.36 ± 0.0 | 0.044 ± 0 | 99.41 ± 0 |
| K23 | 25.4 ± 2 | 861.68 ± 0 | 4.02 ± 0.3 | 0.27 ± 0.2 | 243.01 ± 7.9 | 68.39 ± 0.9 | 53.39 ± 0.4 | 0.013 ± 0 | 99.79 ± 0.2 |
| K24 | 24.9 ± 0.2 | 887.99 ± 0 | 3.36 ± 0.6 | 0.28 ± 0.1 | 199.4 ± 7.2 | 59.71 ± 0.6 | 60.03 ± 1 | 0.019 ± 0 | 99.69 ± 0 |
| K25 | 24.8 ± 1.3 | 852.83 ± 0 | 3.75 ± 0.1 | 0.05 ± 0 | 231.57 ± 1.9 | 80.45 ± 0.9 | 51.74 ± 0.2 | 0.039 ± 0 | 99.67 ± 0 |
| Min | 23.6 | 839.00 | 2.58 | 0.039 | 195.51 | 59.71 | 46.47 | 0.013 | 99.28 |
| Max | 26.0 | 889.74 | 4.53 | 0.502 | 253.27 | 110.0 | 60.03 | 0.052 | 99.79 |
| ASTM D6751-12 | | - | 1.9-6.0 | 0.8 max | - | - | 47 min | 0.24 max | - |
| EN 14214-12 | | 860-900 | 3.5-5.0 | 0.5 max | - | 120 max | 51 min | 0.25 max | 96.5 min |
| SNI 7182:2015 | | 850-890 | 2.3-6.0 | 0.5 max | - | 115 max | 49 min | 0.24 max | 96.5 min |
K: S. foetida biodiesel.