The Digest’s 2026 Multi-Slide Guide to Biogenic CO2 Supply Agreements

Fermentation off-gas from existing ethanol plants offers the cheapest, highest-purity biogenic CO2 for e-SAF production, yet it is widely treated as waste. Securing this vital feedstock requires resolving carbon title and strictly assigning each ton to a single claim—such as 45Q, fuel CI, or durable removal—to prevent fatal double-counting. Because 45Q sets an $85-per-ton value floor, e-SAF developers must secure explicit ownership allocations in supply agreements before transport constraints or pipelines consolidate the market.

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Category: Multi-Slide Guides