From: Hydrocarbon bio-jet fuel from bioconversion of poplar biomass: techno-economic assessment
Step | Chemistry | Cumulative theoretical yield | Cumulative practical yield |
---|---|---|---|
Pretreatment and hydrolysis | \({\text{Wood}}\;{ + }\;{\text{H}}_{ 2} {\text{O}} \to {\text{Sugars}}\;{ + }\;{\text{Lignin}}\) | 722Â kg Sugars | 640Â kg Sugars |
Fermentation | \({\text{C}}_{ 6} {\text{H}}_{ 12} {\text{O}}_{ 6} \to 3 {\text{CH}}_{ 3} {\text{COOH}}\) | 722Â kg Acetic acid | 580Â kg Acetic acid |
Hydrotreat (1) | \({\text{CH}}_{ 3} {\text{COOH}} + 2 {\text{H}}_{ 2} \to {\text{CH}}_{ 3} {\text{CH}}_{ 2} {\text{OH}} + {\text{H}}_{ 2} {\text{O}}\) | 554Â kg Ethanol | 450Â kg Ethanol |
Alcohol dehydration | \({\text{CH}}_{ 3} {\text{CH}}_{ 2} {\text{OH}} \to {\text{C}}_{ 2} {\text{H}}_{ 4} {\text{ + H}}_{ 2} {\text{O}}\) | 337Â kg Ethylene | 260Â kg Ethylene |
Oligomerization | \(n {\text{C}}_{ 2} {\text{H}}_{ 4} \to {\text{CH}}_{ 3} {\text{CH}}_{ 2} - \left( {{\text{CH}}_{ 2} {\text{CH}}_{ 2} } \right)_{n - 2} - {\text{CH = CH}}_{ 2}\) | 337Â kg Distillate | 250Â kg Distillate |
Hydrotreat (2) | \({\text{CH}}_{ 3} {\text{CH}}_{ 2} - \left( {{\text{CH}}_{ 2} {\text{CH}}_{ 2} } \right)_{n - 2} - {\text{CH = CH}}_{ 2} {\text{ + H}}_{ 2} \to {\text{CH}}_{ 3} {\text{CH}}_{ 2} - \left( {{\text{CH}}_{ 2} {\text{CH}}_{ 2} } \right)_{n - 2} - {\text{CH}}_{ 2} {\text{CH}}_{ 3}\) | 341 kg Polymer jet (450 L t−1) | 250 kg Polymer jet (330 L t−1) |