HEFA Yield Analysis
Quantifying the RD → SAF production penalty: cracking vs. isomerization pathways. Private working materials — do not distribute.
⚗️ Yield Slider — Cracking vs. Isomerization
Three publication-quality figures comparing cracking (Pearlson, Zech, Robota) and isomerization (Neste, UOP) pathways. Stacked area chart of product slate vs. SAF yield, Robota non-linearity plot, and side-by-side comparison at ~50% SAF. Full data tables from all three peer-reviewed sources plus rule-of-thumb derivation.
🧮 Isomerization Yield Calculator
Interactive estimator with 5 adjustable parameters: isomerization severity, cracking leakage, feedstock carbon number, jet cut point, and HDO losses. Real-time product slate with stacked bar visualization. Presets for Neste ReNewFine and UOP max-jet modes. Includes side-by-side cracking comparison at matched SAF yield. Both UOP patents (US 2025/0026990, US 11,697,111) referenced.
📚 Sources
• Pearlson et al., Biofuels Bioprod. Bioref. 7:89–96 (2013) — MIT/Aspen Plus, soybean oil
• Zech et al., Applied Energy 231:997–1006 (2018) — DBFZ, jatropha oil, 10 scenarios
• Robota et al., Energy & Fuels 27:985–996 (2013) — UDRI/AFRL, algal oil, 3 severities
• Neste/Ketjen, ERTC 2024 — ReNewFine campaign (74% SAF, >90% yield)
• UOP Patent US 2025/0026990 A1 (Frey et al.) — Isomerization process
• UOP Patent US 11,697,111 (Zink et al.) — SAPO-11 catalyst