Blue Diesel — Deprioritized

Status: Deprioritized (Not Recommended for Phase 1)

What It Is

"Blue Diesel" refers to converting ocean plastic into marine diesel fuel via hydrothermal liquefaction (HTL) or Fischer-Tropsch (FT) synthesis from syngas. A 2021 PNAS study (Worcester Polytechnic Institute / Woods Hole) demonstrated a 480% energy surplus at GPGP high-density zones, suggesting the concept is physically viable.

Theoretical revenue at 10 TPD: $375K–$750K/year from diesel sales.

Why It Was Deprioritized

1. Philosophical contradiction — "We clean the ocean by making fossil fuel" is a toxic narrative for impact investors and credit buyers. The entire credit market depends on The Claw being perceived as environmentally positive. 2. Market direction — marine diesel demand is declining as shipping transitions to ammonia, methanol, and hydrogen. Investing in diesel production is betting against the trend. 3. No clean energy subsidies — unlike hydrogen (IRA Section 45V), diesel production receives no green energy incentives. 4. Equipment complexity — FT or HTL reactors add significant equipment, cost, and maintenance to an already complex vessel. 5. Self-power already works — the ship can burn syngas directly in gas engines. No need to convert to liquid fuel. 6. Lowest revenue — $375K–$750K/year is lower than both plastic credits and hydrogen, making it the least attractive revenue path.

Under What Conditions It Could Be Revisited

• The ship needs liquid fuel for long transits (syngas engines may not provide enough propulsion power)
• A buyer offers a premium for "ocean plastic diesel" as a specialty/novelty product
• Compact FT reactors (e.g., Velocys container-scale) become cheap enough to add as a side output

Key Research

• Blue Diesel Status — full analysis in Decision Research
• Combined Revenue Scenarios — revenue comparison across all paths
• PNAS study: Hank et al. (2021) — energy surplus finding applies to syngas operations generally, even though diesel specifically is not recommended