Do emissions from existing use or fate (eₑₓ₋ᵤₛₑ ) equal emissions from fuel in use (eᵤ)?

Q: Do emissions from existing use or fate (eₑₓ₋ᵤₛₑ ) equal emissions from fuel in use (eᵤ)?

No. eex-use and eu are separate terms.eex-use ≈ eu eex-use is an avoided-emissions credit for emissions that would have occurred from the input’s existing use or fate. This includes the CO₂ equivalent of carbon incorporated into the fuel that would otherwise have been emitted as CO₂.eu is the actual emissions from using/combusting the final fuel. (See Delegated Regulation (EU) 2023/1185, Annex A, points 1 and 10.)For carbon-containing RFNBOs, the two may balance, but only where the carbon in the fuel would otherwise have been emitted as CO₂ and is later emitted during fuel use. The imbalance can come from processing CO₂ losses or leakages, and this belongs under ep, not eex-use.

Modified on Tue, 26 May at 10:50 AM

No. e_ex-use and e_u are separate terms.

e_ex-use ≈ e_u

e_ex-useis an avoided-emissions credit for emissions that would have occurred from the input’s existing use or fate. This includes the CO₂ equivalent of carbon incorporated into the fuel that would otherwise have been emitted as CO₂.

e_u is the actual emissions from using/combusting the final fuel. (See Delegated Regulation (EU) 2023/1185, Annex A, points 1 and 10.)

For carbon-containing RFNBOs, the two may balance, but only where the carbon in the fuel would otherwise have been emitted as CO₂ and is later emitted during fuel use. The imbalance can come from processing CO₂ losses or leakages, and this belongs under e_p, not e_ex-use.