Page 128 - Materials Chemistry, Second Edition

114 K. T. Lee and C. Ofori-Boateng

Table 2 (continued)
Unit Quantity Energy coefficient Total energy
(MJ/kg) (MJ)
Total energy output MJ 188.945
Transportation of RPO to biodiesel
plant (T3)
Diesel kg 0.02531 48.10 1.22029
Emissions to air
CO kg 0.07920 10.11 0.80076
NOx kg 0.00038 296.00 0.11248
Particulate matter kg 0.00015 – –
kg 0.00017 29.50 0.00502
SO 2
Transesterification
Input
RPO kg 0.92500 31.40 29.04500
Methanol kg 0.12278 19.70 2.418766
Sodium hydroxide (NaOH) kg 0.01031 19.87 0.204879
Water kg 0.29576 0.0042 0.001242
Phosphoric acid (H 3 PO 4 ) kg 0.00959 32.62 0.312826
Energy consumption
Steam MJ 0.21600 1.36 0.293760
Electricity MJ 0.04214 – 0.042140
Total energy input MJ 32.31861
Outputs
Biodiesel kg 1.00000 39.84 39.84000
Glycerol kg 0.23860 18.05 4.306730
Wastewater kg 0.05359 45.93 2.461388
Na 3 PO 4 kg 0.00146 1.421 0.002075
Emissions to air
CO 2 kg 2.55281 32.12 81.99626
Total energy output MJ 128.6065
Transportation of biodiesel to
consumer (T4)
Diesel kg 0.02490 48.10 1.1978
Emissions to air
kg 0.07792 32.12 2.5027
CO 2
kg 0.00028 296.00 0.0829
NO x
Particulate matter kg 0.00014 – –
kg 0.00011 29.50 0.0032
SO 2
TOC kg 0.07732 – –
Biodiesel use in diesel engine
Biodiesel kg 1.00000 39.84 39.840
Emissions to air
kg -16.0890 32.12 -516.78
CO 2
kg 0.01360 296.00 4.0256
NO x
Particulate matter kg -0.00454 – –
(continued)