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Table 9 Hydrocarbon biofuel production reaction network

From: Hydrocarbon bio-jet fuel from bioconversion of poplar biomass: techno-economic assessment

Step

Chemistry

Cumulative theoretical yield

Cumulative practical yield

Pretreatment and hydrolysis

\({\text{Wood}}\;{ + }\;{\text{H}}_{ 2} {\text{O}} \to {\text{Sugars}}\;{ + }\;{\text{Lignin}}\)

722 kg Sugars

640 kg Sugars

Fermentation

\({\text{C}}_{ 6} {\text{H}}_{ 12} {\text{O}}_{ 6} \to 3 {\text{CH}}_{ 3} {\text{COOH}}\)

722 kg Acetic acid

580 kg Acetic acid

Hydrotreat (1)

\({\text{CH}}_{ 3} {\text{COOH}} + 2 {\text{H}}_{ 2} \to {\text{CH}}_{ 3} {\text{CH}}_{ 2} {\text{OH}} + {\text{H}}_{ 2} {\text{O}}\)

554 kg Ethanol

450 kg Ethanol

Alcohol dehydration

\({\text{CH}}_{ 3} {\text{CH}}_{ 2} {\text{OH}} \to {\text{C}}_{ 2} {\text{H}}_{ 4} {\text{ + H}}_{ 2} {\text{O}}\)

337 kg Ethylene

260 kg Ethylene

Oligomerization

\(n {\text{C}}_{ 2} {\text{H}}_{ 4} \to {\text{CH}}_{ 3} {\text{CH}}_{ 2} - \left( {{\text{CH}}_{ 2} {\text{CH}}_{ 2} } \right)_{n - 2} - {\text{CH = CH}}_{ 2}\)

337 kg Distillate

250 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)

  1. The major process steps are shown with the relevant chemical equations. Theoretical and practical yields shown use a basis of one bone dry tonne of poplar. Yields are based on the literature and conservative assumptions in collaboration with our industry partners