In my model I use Stock-turnover for my Transport (Transport method). That means my input is defined in vintages of vehicles, not the average as otherwise.

I want to implement mixed biofuels (Biodiesel mix and Gasoline-Ethanol mix) to my model. Since all vintages will transition to these fuels, I cannot define it as two fuels under the vehicle type (as I would do for PHEV's)

Instead I'm defining a new fuel in Secondary Transformation. Let's use Biodiesel mix as an example:

My biodiesel mix fuel consists of two fuel; biodiesel and diesel, mixed with a changing ratio over the years. in 2020, it's 10% biodiesel, in 2050, it's 40%.

Now all my vehicles run on biodiesel mix and all is good. Primary Requirements for the vehicle type shows the right allocation between bio and oil, great. If I show final demand, the model shoes me the "biodiesel mix" demand, which is ok.

But here's the issue: When I show non-biogenic CO2 in Results, my mixture is defined as 0. This is as there is not defined any carbon contents in the "Fuels" menu. However, my mix changes, so I cannot define a fixed carbon content.

What can I do for implementing a mixed fuel in gas station pumps?

Gregers Larsen