SkyClean 2MW


Agriculture, shipping, aircraft, trucks and certain industrial processes are difficult sectors to decarbonise. For example, a significant proportion of agricultural CO2 emissions come from fiber in livestock manure that is spread in the fields and from plant residues that, when plowed and decompose, emit large amounts of CO2.


Project SkyClean builds a pyrolysis plant that heats biological residues in an oxygen-free room and converts the residues into biochar, bio-oil and syngas. The biochar can be plowed down and store CO2 stably for over 500 years. Biochar also has a favorable soil improvement effect and can help reduce agricultural methane emissions. The bio-oil can be refined and used as fuel for e.g. ships, aircraft and trucks. Syngas can be used for industrial heating, district heating or potentially converted to bio-methane.


DTU estimates that recycling of manure and biological residues through the pyrolysis process can reduce agricultural CO2 emissions by 50 percent. The company Stiesdal estimates that SkyClean technology has the potential to limit Denmark’s emissions by DKK 7 million. tons of CO2 in 2030.

Problem owner


Problem solvers

DTU Danmarks Tekniske Universitet

Dansk Gasteknisk Center



Arla Food amba

Project timeline

PHASE 1: Conceptualisation
PHASE 2: Development and testing
PHASE 3: Demonstration and validation
PHASE 4: Commercialisation

Financed by


Start: September 2021
End: September 2024

EUDP-funding: DKK 23 million
Total budget: DKK 36.4 million

Contact person

Christian Munk Jensen

Christian Munk Jensen
Project Manager
Tlf: +45 5055 2606