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Bio4EnergyArlanda SE AnnaStrom2020Some of the feedstock that goes into bio-based jet fuel products being developed goes to waste already in the production process. Bio4Energy researchers have set out to find out how much and what can be done about it. Photo by Bio4Energy. researchers are launching the second in a series of projects, to map the extent of the so-called carbon efficiency of advanced biofuels and calculate the cost of efficiency improvements. In this context, carbon efficiency is a measure of the extent to which the carbon in the bio-based starting material, or feedstock, ends up in the final energy product.

Whereas the first project looks at a number of routes to produce biofuels for road transport, via specific value chains; the second is focussed on bio-based jet fuel technologies and resulting products.

According to This email address is being protected from spambots. You need JavaScript enabled to view it., researcher at RISE Research Institutes of Sweden; who leads the project on bio-based jet fuels; there is great variation in the carbon efficiency depending on the process route and technology.

Biomass gasification employing Fischer–Tropsch technology and alcohols-to-jet, respectively, were two relevant tracks considered in this project in terms of using wood-based feedstock for jet fuel production in the short term, he explained.

While biomass gasification is a high-temperature process that disintegrates biomass to a gas mixture that contains hydrogen, carbon monoxide and carbon dioxide (CO2); the Fischer–Tropsch process is a collection of chemical reactions that convert a mixture of carbon monoxide and hydrogen into liquid hydrocarbons under high temperatures.

“We will be investigating whether the residual stream of CO2 can be captured and either upgraded to fuel or compressed and stored", Furusjö said; 

“How much does it cost to increase efficiency and what [financial] support will be required for production to take place? That is what we will be looking into”.

The two projects are financed by the Swedish Energy Agency, the f3 Swedish Knowledge Centre for Renewable Transportation Fuels, in collaboration with Bio4Energy at the Luleå University of Technology (LTU), Neste, RISE and SkyltMax. 

Two key technologies will be evaluated for capturing and storing or capturing and using the excess CO2, namely bioenergy with carbon capture and storage (BECCS) and bioenergy with carbon capture and use (BECCU).

For more information on BECCS and BECCU, se fact sheets by organisations such as Bioenergy Europe or the International Energy Agency.

The project Climate-positive and carbon-efficient bio jet fuels, are they possible? – A systematic evaluation of potential and costs, is a collaboration between Furusjö and Elisabeth Wetterlund, associate professor at the LTU and deputy programme manager of Bio4Energy.

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