Today, the U.S. Department of Energy released the 45ZCF-GREET model. This announcement follows the U.S. Department of the Treasury and Internal Revenue Service guidance on the Clean Fuels Production Credit (section 45Z) released on January 10, 2025.
January 15, 2025
minute read time
Today, the U.S. Department of Energy released the 45ZCF-GREET model. This announcement follows the U.S. Department of the Treasury and Internal Revenue Service guidance on the Clean Fuels Production Credit (section 45Z) released on January 10, 2025.
The Clean Fuels Production Credit provides a tax credit for the production of transportation fuels with life cycle emissions below certain levels. The credit applies to eligible transportation fuel produced domestically after December 31, 2024, that is sold by December 31, 2027.
45ZCF-GREET includes feedstock-specific fuel production pathways for synthetic aviation fuels (SAF) and non-SAF fuels. The model is designed specifically to evaluate life cycle emissions to meet the requirements of section 45Z and to include features that make it easy to use for taxpayers.
DOE also released the 45ZCF-GREET User Manual which describes how the 45ZCF-GREET model characterizes life cycle emissions of transportation fuel production pathways and provides guidance for using the model to determine emissions rates for alternative fuels under section 45Z.
The 45ZCF-GREET model and user manual are available on the DOE GREET webpage.