Engineering tool · mass & energy balance
From CO₂ to jet fuel
A Power-to-Liquid mass and energy balance for the eKeroBel pathway. Set the plant size and the process options to see the feedstocks, products, electricity demand, renewable capacity and efficiency, benchmarked against the literature.
Annual e-SAF production
Average jet carbon number (n)
Sets the stoichiometry of the fuel lump CₙH₍₂ₙ₊₂₎.
e-LPG per e-SAF
Co-product split. 0.25 means a 4:1 e-SAF to e-LPG ratio.
Electrolyser technology
Specific electricity per kg of hydrogen, the dominant energy term.
Hydrogen supply
On-site puts the electrolyser power in the site balance. Tolling treats hydrogen as delivered.
CO₂ source
Sets the capture energy, borne mainly by the CO₂ supplier.
Operating hours
Renewable resource
Used to size installed capacity from annual energy.
Annual mass balance
| Stream | Per year (t/yr) | Per t e-SAF | kg/h |
|---|---|---|---|
| Biogenic CO₂ (in) | 1,696 | 3.85 | 212 |
| Green hydrogen (in) | 233 | 0.53 | 29 |
| Water to electrolyser (in) | 2,097 | 4.77 | 262 |
| Green methanol (intermediate) | 1,234 | 2.81 | 154 |
| e-SAF (out) | 440 | 1.00 | 55 |
| e-LPG (out) | 110 | 0.25 | 14 |
| Oxygen (co-product) | 1,864 | 4.24 | 233 |
| Process water formed | 694 | 1.58 | 87 |
Carbon to products vs carbon in CO₂: 100%
Highlights
Electrolysis accounts for about 100% of on-site electricity, so efficiency gains come almost entirely from the hydrogen step.
- ·At this output the implied 12.2 MWp exceeds the planned 11 MWp supply, so additional renewables or grid balancing would be needed.
- ·Switching to SOEC at about 40 kWh/kg would cut electrolyser electricity by about 23% and lift the all-liquids efficiency to about 67%.
Indicative estimates for early-stage screening. Results depend on site-specific conditions, technology choice and detailed engineering.