The archive · Climate & Energy · Technical decision · 2026
Ki 13 raises $5M to bet biomass electrolysis can make cheap synthetic fuels
Ki 13's bet: biomass electrolysis makes cheap green hydrogen and biogenic CO₂; a $5M seed announced 2026-09-02 funds its industrial pilot plant
Ki 13
What the business is
UK cleantech company whose biomass-electrolysis process turns lignocellulosic agricultural and forestry residues into separate streams of green hydrogen and biogenic CO₂ — the two costly feedstocks for synthetic fuels and chemicals such as e-SAF, e-methanol and e-methane.
Starting capital：$5M seed round announced 2026-09-02 (led by HICO Investment Group, with Innovate UK non-dilutive match funding), after an earlier pre-seed backed by HICO and Desai Ventures.
How it started
The company started as Ki Hydrogen, a UK cleantech venture built around co-founder and CEO Koji Muto's first-principles conviction that 'economics drive meaningful change'; it now operates as Ki 13. HICO Investment Group and Desai Ventures backed an earlier pre-seed round.
What happened
On 2026-09-02 Ki 13 announced a $5M seed round led by HICO Investment Group, with Burgest, Triple Impact Ventures, GiTV and Desai Ventures participating and non-dilutive match funding from Innovate UK. The money is earmarked for an industrial pilot plant that will test the biomass electrolysis process at larger scale and carry it toward commercial deployment. HICO's CEO Christopher Hartnoll framed the thesis: 'the biggest barrier to scaling green hydrogen and synthetic fuels is not demand, but economics.'
No ending yet — it is still running.
Background
Ki 13 is a UK cleantech startup — formerly Ki Hydrogen — developing biomass electrolysis, a low-temperature electrochemical process that turns lignocellulosic agricultural and forestry residues into separate streams of green hydrogen and biogenic CO₂. Those are the two main feedstocks for synthetic fuels and chemicals, including sustainable aviation fuel (e-SAF), e-methanol and e-methane.
The founding bet is that economics, not demand, blocks synthetic fuels: water electrolysis typically uses around 50 kWh per kilogram of hydrogen and direct air capture 2,000–3,000 kWh per tonne of CO₂, while Ki 13 says its process needs about 25 kWh per kilogram of hydrogen and 300 kWh per tonne of CO₂ — using residue biomass, not purpose-grown crops. Co-founder and CEO Koji Muto says the team started from first principles because 'economics drive meaningful change.'
Ki 13 announced a $5M seed round on 2026-09-02, led by HICO Investment Group with Burgest, Triple Impact Ventures, GiTV and Desai Ventures participating and Innovate UK providing non-dilutive match funding, after an earlier pre-seed backed by HICO and Desai. The money funds an industrial pilot plant to test the process at larger scale on the path to commercial deployment.
What has to be true
- Synthetic fuels stall on input cost, not demand: Ki 13's process claims half the energy per kg of hydrogen and a tenth per tonne of CO₂ versus electrolysis and direct air capture
- Using agricultural and forestry residues rather than purpose-grown biomass sidesteps the land-use argument that haunts biofuel feedstocks
- Producing both inputs in one electrochemical step attacks the whole e-fuel cost curve, not a single line item
What can be applied
When incumbents are stuck on an expensive process, look for an input step that removes the cost rather than improving it — Ki 13's pitch was an energy comparison, not a bigger machine
Aftermath
As of 2026-09-05 Ki 13 is pre-commercial and building: the $5M seed announced on 2026-09-02 is earmarked for an industrial pilot plant, and there is no terminal outcome yet — the bet that biomass electrolysis can make green hydrogen and biogenic CO₂ cheap enough for synthetic fuels to scale is still being tested at pilot scale.
Sources
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