Co-product emissions allocation

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2 weeks 2 days ago #168 by klewko7
Co-product emissions allocation was created by klewko7
Hi,

First time posting here. I don't have too much experience with GHG Genius. Looking for some help on proper allocation for carbon intensity (C.I.) scores for the upcoming Canadian Clean Fuel Standard. Our spreadsheet was developed by a life cycle analysis expert based off of GHG Genius.

In our GHG genius model we take landfill diverted waste and create our main product: bio-crude oil. We also create by products: bio-char and gases.

Our current setup has us allocating the project vs baseline emissions entirely to the bio-crude oil for a C.I. score of that liquid fuel. Is this acceptable? Or must I breakdown emissions further?

For example:
1.The hypothetical project would create significant emissions reduction by diverting waste from the landfill. Can that benefit be entirely allocated to the main product or must it be broken down via yield % of all of the products created?

Same thing for feedstock transport, production emissions, etc.? Currently it is all attributed to the main product. Should this be entirely allocated to the main product or must it be broken down via yield % of all of the products created?

2. We have offset benefits from our bio-crude, bio-char and gases. Can all of this benefit be attributed to the main product(bio-crude)?

Looking forward to learning from someone's response! Thank you.

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2 weeks 2 days ago #170 by doconnor
Replied by doconnor on topic Co-product emissions allocation
Doing an LCA is a bit different than looking at the emissions on a project basis. There will be a functional unit established, one MJ of bio-oil in your case and since you will be making multiple products the emissions will have to be allocated between the primary product and the co-products.

We don't have all of the details on how the ECCC model is going to work but from what they have provided, they plan on using energy allocation for most co-products. This does create some issues since your solid and gaseous fuels won't be used to generate credits you may not be able to capture the emission reductions from the use of the co-products unless they are used inside your system, in which case they aren't really co-products.

Energy allocation basically means that you divide the total system emissions by the total energy content of the product and co-products. The result value, g CO2/MJ will be the CI of your primary product and it will be the same as the CI of your co-products.

In GHGenius energy allocation can be chosen on the coproducts sheet.

The CI of your biocrude will be compared to the CI of the reference fuel and that is how credits will be established. As mentioned with energy allocation for biogenic fuels there is no way to get credit for the use of co-products unless those co-products are used as liquid fuels.

Regards
Don O'Connor

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1 week 6 days ago #171 by klewko7
Replied by klewko7 on topic Co-product emissions allocation
Hi Don,

Thanks for the reply. Another question.

Do you have any insight into the land use & bio diversity (LUB) compliance credit creation? I have been reading a lot of the CFS documentation and I am still a bit confused as to how these credits are valued. Is it blended into the CI score of the fuel or is this something separate?

Thanks.

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1 week 6 days ago #172 by doconnor
Replied by doconnor on topic Co-product emissions allocation
There are Land Use and Biodiversity (LUB) criteria for feedstocks that must be met for the resulting fuel to be eligible to generate credits but I don't think that there are any separate credits available for meeting the LUB criteria.

The value of any CFR credits that are generate from the production and use of low carbon fuels will be determine by the marketplace.

Regards
Don O'Connor

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