What this document is
The commercial structure of one Circular Supply Agreement for Nucor and DJJ — deployment from 100 to 400 TPD, the Beneficiation Fee, the Circular Royalty™, risk and timeline.
- Phase Initial at 100 TPD (36,500 TPY) is the entry point; the CSA scales to 400 TPD, the full addressable ASR volume.
- One CSA, no election: Nucor/DJJ pay $150/ton and receive a Circular Royalty™ of $180/ton from Month 13.
- Zero counterparty capital against a $75M–$247.5M privately financed build; ADEM permits the facility as manufacturing.
North Alabama Industrial Corridor
Circular Supply Proposal
A 30-year Circular Supply Agreement converts Nucor and DJJ’s Southeast ASR stream into manufacturing feedstock, at zero counterparty capital.
What This Means
- Nucor and DJJ commit feedstock. Under the Circular Supply Agreement (CSA), Nucor/DJJ deliver Automotive Shredder Residue at the Beneficiation Fee of $150/ton to Carbotura's North Alabama ACM facility. This is the sole financial obligation — zero capital contribution, zero construction liability, zero operating exposure.
- Carbotura finances, builds, and operates everything. The BOO structure means Carbotura owns the $75M–$247.5M facility outright, sources all institutional financing, and carries 100% of construction and operating risk.
- Circular Royalty™ begins Month 13. Starting 13 months after Phase Initial commercial operations, Nucor/DJJ receive a Circular Royalty™ of 120% of that year's Beneficiation Fee, escalating +1 percentage point annually. At $150/ton TMC, the Year-2 Circular Royalty™ is $180/ton.
- Current disposal costs eliminated. Every ton entering the CSA avoids the current $75/ton ADEM-permitted disposal cost. The gross cost displacement at 400 TPD is $10.95M/year, reported separately from the Circular Royalty™.
- RCRA reclassification exposure eliminated. ASR entering ACM is classified as manufacturing feedstock under NAICS 325180/325998/327992/331110/331314/331492. Nucor and DJJ are permanently insulated from Subtitle C hazardous waste disposal costs — an exposure that could otherwise reach $150–$250/ton.
Commercial Structure and Decision Window
§1.1 — The Circular Supply Agreement (CSA)
| Element | Nucor / DJJ Commits | Carbotura Commits |
|---|---|---|
| Capital investment | $0 — zero capex obligation | $75M (Initial) → $247.5M (Expanded) — fully privately financed |
| Construction risk | None | 100% — BOO structure |
| Operating risk | None | 100% — Carbotura owns and operates |
| Feedstock delivery | ASR as specified — 100/200/400 TPD by phase | Acceptance guaranteed for CSA term |
| Beneficiation Fee payment | $150/ton base, 2.5%/yr escalator | Processing at guaranteed acceptance rate |
| Circular Royalty™ receipt | 120% of the current-year Beneficiation Fee from Month 13, +1pp/yr | Payment obligation for 30-year CSA term |
| Term | 30 years from Phase Initial COD | |
§1.2 — Decision Window
Phase Initial COD is targeted at T0+24 months (T0 = CSA execution). To achieve a Phase Initial COD within the Carbotura standard deployment schedule, authorization of Term Sheet phase verification is required no later than T0. Every quarter of delay in LOI/MOU execution shifts Phase Initial COD — and the first Circular Royalty™ payment at T0+37 months — by an equivalent quarter. At 400 TPD, each quarter of delay defers approximately $3.6M in annualized Circular Royalty™.
Deployment Architecture
§2.1 — Phase Configuration
CapEx: $75M
CapEx: $132.5M cumulative
CapEx: $247.5M cumulative
| Phase | TPD | Modules | Annual TPY | % of Addressable | COD Target |
|---|---|---|---|---|---|
| Initial | 100 | 1 | 36,500 | ~28% of ~360 TPD | T0+24 months |
| Medium | 200 | 2 | 73,000 | ~56% | T0+42 months |
| Expanded | 400 | 4 | 146,000 | ~111% (requires third-party) | T0+60 months |
§2.2 — BOO Capital Structure — Zero Counterparty Capex
| Capital Component | Phase Initial ($75M) | Phase Expanded ($247.5M) | Source |
|---|---|---|---|
| Institutional Equity (20%) | $15.0M | $49.5M | Carbotura / institutional equity |
| Grant / Concessional (15%) | $11.25M | $37.1M | Federal / IRA programs (conservative est.) |
| Project Finance Debt (65%) | $48.75M | $160.9M | Senior secured project finance |
| Nucor / DJJ Contribution | $0 | $0 | Zero capex obligation under BOO |
§2.3 — Feedstock Stream Coverage by Phase
| Stream | Phase Initial | Phase Medium | Phase Expanded | Access Status |
|---|---|---|---|---|
| Light ASR — DJJ SE network | ✓ Primary | ✓ Primary | ✓ Primary | IMMEDIATE |
| Heavy ASR — DJJ non-ferrous residual | ✓ Supplemental | ✓ Supplemental | ✓ Supplemental | IMMEDIATE |
| Third-party SE shredder ASR | Not required | Partial | Required | CONDITIONAL |
| EV emerging stream | Not required | Not required | Optional supplement | ACCESSIBLE |
§2.4 — Site Candidate Analysis
The Morgan County Industrial District immediately adjacent to Nucor Steel Decatur LLC is the Priority 1 ACM site candidate. It combines direct Nucor co-location, TVA power (lowest US industrial electricity rates), Tennessee River barge access for commodity outputs, I-65/US-72 highway connectivity to the DJJ Birmingham shredder cluster 85 miles south, and Morgan County IDB active support for Nucor-adjacent industrial investment — evidenced by the $125M Towers & Structures commitment in 2023.
§2.4b — Site Candidate Summary
| Priority | Zone | Acreage | Zoning | Land Authority | Co-location Advantage | Key Consideration |
|---|---|---|---|---|---|---|
| P1 | Morgan County Industrial District, Decatur | 200+ ac | I-2 Heavy Industrial | Morgan County IDB / Decatur IDB | Adjacent to Nucor Steel Decatur LLC campus; TVA power; Tennessee River barge | IDB engagement required; buffer zone assessment |
| P2 | Tuscaloosa County Industrial Zone | 150+ ac | I-2 Heavy Industrial | TCEDA | Near Nucor Steel Tuscaloosa; I-20/59 corridor; TCEDA track record | Campus congestion risk during Nucor $280M expansion (2027) |
| P3 | Jefferson County — North Birmingham Industrial | 80–120 ac | Heavy Industrial | Jefferson County EDA / Tarrant IDB | Closest to DJJ Birmingham hub (~8mi); largest AL labor market | Weaker Nucor co-location; urban permitting complexity |
§2.5 — Finding: Phase Initial Feedstock Sufficiency
Phase Initial at 100 TPD (36,500 tpy) is fully supportable from DJJ-captive IMMEDIATE streams alone — Light ASR and Heavy ASR from the SE shredder network. No third-party contract negotiation is required to commence operations. This is a captive supply chain decision, not a market procurement exercise.
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Economic Structure — Beneficiation Fee (TMC Fee)
§3.1 — Beneficiation Fee Formula and Agreed Rate
Current disposal cost (FWDC) is ESTIMATED at $75/ton based on Southeast regional benchmarks (EREF 2024 + ASR special handling). Verified rates require Nucor/DJJ operations data disclosure, which Term Sheet phase verification will establish. The $150/ton Beneficiation Fee is set at the Carbotura ceiling and applies regardless of verified FWDC outcome.
§3.2 — Annual TMC Obligation by Phase
| Phase | TPD | TPY | Year 1 TMC/ton | Year 1 Annual TMC | Year 10 TMC/ton | Year 10 Annual TMC |
|---|---|---|---|---|---|---|
| Initial | 100 | 36,500 | $150.00 | $5,475,000 | $187.33 | $6,837,545 |
| Medium | 200 | 73,000 | $150.00 | $10,950,000 | $187.33 | $13,675,090 |
| Expanded | 400 | 146,000 | $150.00 | $21,900,000 | $187.33 | $27,350,180 |
Beneficiation Fee escalator: 2.5%/year compounding. Carbotura standard parameter. Floor $100/ton · Ceiling $150/ton per Carbotura standard parameters.
Circular Royalty™
1. Gross cost displacement is quantified separately from Circular Royalty™ cash flow.
2. At steady state, the Circular Royalty™ is designed to exceed the Beneficiation Fee on a per-ton basis.
3. Circular Royalty™ payments begin 13 months after corresponding Beneficiation Fee payments and ramp to full run-rate on a rolling basis.
§4.1 — Contractual Formula
§4.1 — Parameter Table
| Parameter | Value | Type |
|---|---|---|
| Base Royalty Rate (Year 1) | 120% of the current-year Beneficiation Fee | Carbotura standard |
| Year 1 Beneficiation Fee per ton | $150.00 | Agreed rate |
| Year 2 Base Royalty per ton | $150.00 × 1.20 = $180.00 | Derived |
| Beneficiation Fee escalator | 2.5%/year compounding | Carbotura standard |
| Royalty rate escalator | +1 percentage point/year | Carbotura standard |
| Payment lag | 13 months after corresponding TMC payment | Carbotura standard |
| Structure | Rolling lagged cash flow — monthly basis | Carbotura standard |
| CSA term | 30 years from Phase Initial COD | Carbotura standard |
§4.3 — Fiscal Period Distinction
| Period | Timing | Beneficiation Fee Status | Royalty Status |
|---|---|---|---|
| Pre-Royalty | Months 1–12 after Phase Initial COD | Paid — $150/ton | $0 — building royalty claim |
| Royalty Ramp | Month 13 to ~Month 24 | Paid — $153.75/ton (Yr 2) | Begins — $180.00/ton (Yr 2) |
| Steady State | Year 2 onward — growing | Escalating 2.5%/yr | Escalating (TMC × rate%, +1pp/yr) |
§4.4 — Year-by-Year Cash Flow (Phase Initial — 100 TPD / 36,500 tpy)
| Year | Avoided Disposal Cost | Beneficiation Fee Paid | Royalty Rate | Royalty Received |
|---|---|---|---|---|
| Year 1 | $2,737,500 | −$5,475,000 | N/A — pre-royalty | $0 |
| Year 2 | $2,737,500 | −$5,611,875 | 120% | $6,570,000 |
| Year 5 | $2,737,500 | −$6,043,305 | 123% | $7,251,820 |
| Year 10 | $2,737,500 | −$6,837,545 | 128% | $8,538,445 |
| Year 20 | $2,737,500 | −$8,752,700 | 138% | $11,784,025 |
| Year 30 | $2,737,500 | −$11,204,040 | 148% | $16,177,530 |
Royalty figures are amounts received. The royalty is paid 13 months in arrears, so the figure shown for a year is earned on the previous year’s delivered tonnage.
§4.5 — Three-Item Gross Fiscal Chart (Phase Initial — 100 TPD)
Insight: Avoided Disposal Cost (amber) and Circular Royalty™ (emerald) together exceed Beneficiation Fee (red) from Year 2. The royalty rate escalates faster than the fee every year.
Source: Locked Assumption Registry — April 2026. FWDC ESTIMATED.
§4.6 — Annual Cash Flow by Phase (Year 2 Steady State)
| Phase | TPY | Year 2 TMC Paid | Year 2 Royalty | Annual Gross Disposal Avoided |
|---|---|---|---|---|
| Initial (100 TPD) | 36,500 | −$5,611,875 | +$6,570,000 | $2,737,500 |
| Medium (200 TPD) | 73,000 | −$11,223,750 | +$13,140,000 | $5,475,000 |
| Expanded (400 TPD) | 146,000 | −$22,447,500 | +$26,280,000 | $10,950,000 |
Risk Register
| Risk | Key Driver | Who Bears It | Mitigation | Residual Exposure |
|---|---|---|---|---|
| FWDC verification | Current $75/ton ESTIMATED; actual contract rates may differ | Nucor/DJJ (contract decision) | Term Sheet phase verification establishes verified FWDC | Beneficiation Fee at ceiling regardless — low financial impact |
| Technology performance | MCR yield variability vs. ASR feedstock composition | Carbotura (BOO operator) | Carbotura standard parameters; feedstock characterization prior to COD | Low — Nucor/DJJ Beneficiation Fee obligation is tonnage-based, not output-based |
| Timeline slippage | Permitting, construction, supply chain | Carbotura (BOO operator) | Morgan County IDB active support; ADEM manufacturing permit pathway | First royalty payment delayed; no financial penalty to Nucor/DJJ |
| Existing disposal contract constraints | Active ASR disposal contracts — expiry undisclosed | Nucor / DJJ (switching decision) | Contract review in Term Sheet phase verification; phased transition aligned to expiry windows | Phase Initial may require temporary parallel disposal until contract expiry |
| RCRA reclassification | Federal ASR hazardous classification trigger on TCLP | Carbotura (manufacturing classification eliminates exposure for counterparty) | Carbotura manufacturing classification basis (NAICS 31–33) | None for Nucor/DJJ under CSA — risk eliminated by manufacturing NAICS classification |
| Output commodity market risk | Synthetic graphite and recovered metals pricing | Carbotura (sole output owner) | Diversified commodity basket; IRA §45Q/§45X credits as upside | None — Nucor/DJJ return is CSA-contractual, not commodity-linked |
| PCB constituent characterization | ASR PCB levels variable; >50 ppm triggers additional handling | Carbotura (acceptance decision) / DJJ (inbound material policy) | TCLP and PCB characterization in Term Sheet phase verification; acceptance protocol established pre-COD | Low — DJJ already operates inbound material acceptance policies |
Deployment Timeline
| Milestone | Timing | Decision / Action Required |
|---|---|---|
| LOI/MOU execution | T0 | Nucor / DJJ internal authorization to proceed with Term Sheet phase verification |
| Term Sheet phase verification Complete | T0 + 3 months | Verified FWDC, volume characterization, contract review, P1 site confirmation |
| Phase Initial Construction Start | T0 + 6 months | CSA execution + Morgan County IDB site agreement + Carbotura financing close |
| Phase Initial COD — 100 TPD | T0 + 24 months | Phase Initial commercial operations commence; Beneficiation Fee billing begins |
| First Circular Royalty™ Payment | T0 + 37 months | Month 13 after Phase Initial COD — $180/ton on 13 months of TMC volume |
| Phase Medium Full Ops — 200 TPD | T0 + 42 months | Second module online; third-party contract volumes begin |
| Phase Expanded Full Ops — 400 TPD | T0 + 60 months | Four modules; full addressable volume engaged |
Carbotura standard deployment schedule. No project-specific T0 confirmed. Timeline is indicative pending Term Sheet phase verification and permitting confirmation.
Value Stack
§7.1 — Operational Fiscal Effects (Nucor / DJJ Direct)
| Effect | Year 1 (Initial) | Year 2+ (Initial) | Year 2+ (Expanded) |
|---|---|---|---|
| Circular Royalty™ received | $0 | +$6.57M/yr | +$26.28M/yr |
| Gross disposal cost eliminated | +$2.74M | +$2.74M/yr | +$10.95M/yr |
| Beneficiation Fee paid | −$5.48M | −$5.61M/yr | −$22.45M/yr |
| RCRA hazardous liability eliminated | Structural (valued at $0 today; risk = $2.74M–$10.95M at $150–250/ton) | ||
§7.2 — Regional Economic Effects (Morgan County / North Alabama)
| Metric | Initial (100 TPD) | Expanded (400 TPD) | Source Type |
|---|---|---|---|
| Direct FTE — ACM facility | ~48 | ~192 | ESTIMATED |
| Indirect jobs — regional supply chain | ~120 | ~480 | ESTIMATED |
| Annual economic impact — Morgan County | ~$20.2M | ~$80.6M | ESTIMATED |
| Property tax base addition | Based on $75M asset | Based on $247.5M asset | ESTIMATED |
Why This Works in North Alabama
| Alignment Factor | Finding | Source |
|---|---|---|
| 1. Volume Alignment | DJJ SE shredder network generates ~360 TPD addressable ASR — IMMEDIATE streams alone support Phase Initial at 100 TPD with no third-party contracts required | DJJ network data; ISRI industry yield ratios — ESTIMATED |
| 2. Infrastructure Alignment | Morgan County P1 site adjacent to Nucor Steel Decatur complex; TVA power corridor (lowest US industrial electricity rates); Tennessee River barge for output logistics; I-65/US-72 highway from DJJ Birmingham in 85 miles | TVA service territory; Google Maps distance verification; Morgan County IDB public record |
| 3. Contract Timing Alignment | ASR disposal contracts are active but expiry-undisclosed — characterization study will establish transition windows; Phase Initial 24-month build timeline aligns with typical 2–3 year industrial contract cycles | Registry §C; industry standard contract terms |
| 4. Policy Alignment | Alabama ADEM grants manufacturing permits under standard industrial framework (not waste facility permit); Carbotura manufacturing classification basis (NAICS 31–33) provides federal classification basis; IRA §45Q and §45X credits apply as memo-only upside, excluded from the base CSA model | Alabama Admin. Code; RCRA §1004(27) · 40 CFR §261.2(e); IRS IRA guidance |
| 5. Regulatory Driver | RCRA Subtitle C reclassification risk for ASR is the structural irreversibility driver — PCB/heavy metal constituent profiles mean future hazardous classification is credible. ACM permanently eliminates this exposure class for Nucor/DJJ as the counterparty under the CSA's manufacturing feedstock classification | EPA RCRA §262.11; Alta Environmental ASR guidance; Okon Recycling technical review |
| 6. Economics Specificity | Beneficiation Fee: $150/ton (Carbotura ceiling — agreed, reflecting full regulatory risk transfer); FWDC: $75/ton (ESTIMATED — SE regional average); Year 2 Circular Royalty™: $180/ton | Locked Assumption Registry — April 2026 |
Environmental Attributes, Tax Credits & Carbon Product Offtake
The ACM facility produces two categories of output beyond the Circular Royalty™ structure: manufactured carbon products (synthetic graphite) and environmental attributes including IRA tax credits and carbon credits. Carbotura extends to Nucor Corporation a right-of-first-negotiation on both. Each carries direct shareholder value and a measurable effect on the carbon intensity of Nucor's steel products. All items in this section are memo-only upside — they do not affect the CSA commercial terms or the Circular Royalty™ structure, which stand independently.
IRA §45Q and §45X credits, carbon product offtake, and carbon credit monetisation relate to manufacturing NAICS classification (NAICS 31–33) and lifecycle analysis outcomes. They do not affect Beneficiation Fee, Circular Royalty™, or CSA commercial structure. They are additive only.
§9.1 — Synthetic Graphite Offtake — Nucor as First-Right Buyer
The ACM process reforms the ~66% organic polymer fraction of ASR (primarily PP/PE, foam, rubber, and textile fibres) into synthetic graphite — a critical industrial mineral with applications in EAF steel production, battery anode material, and refractory linings. At 100 TPD ASR input, estimated graphite output is approximately 5,500–8,000 tpy. At 400 TPD, approximately 22,000–32,000 tpy.
| Parameter | 100 TPD (Phase Initial) | 400 TPD (Expanded) | Basis |
|---|---|---|---|
| Estimated graphite output | ~5,500–8,000 tpy | ~22,000–32,000 tpy | 15–22% carbon yield from organic fraction — ESTIMATED pending characterisation |
| Graphite market value (industrial grade) | $500–$1,200/tonne | $500–$1,200/tonne | Industrial synthetic graphite — Q1 2026 market range |
| Estimated output value at offtake | $2.75M–$9.6M/yr | $11M–$38.4M/yr | ESTIMATED — subject to purity specification and offtake pricing |
| Carbotura right-of-first-negotiation | Offered to Nucor Corporation on execution of Term Sheet phase verification | Memo — not in base CSA | |
| Origin classification | Waste-derived / circular — not fossil-sourced. Carbon was already embodied in ASR at end-of-vehicle-life. | Lifecycle basis | |
Nucor's EAF steelmaking requires carbon additions (typically petroleum coke or anthracite) to control steel chemistry and serve as electrode material. Those inputs are Scope 3 Category 1 fossil carbon purchases. Synthetic graphite sourced from Nucor's own ASR — material that was already in the supply chain — is waste-derived circular carbon, not new fossil extraction. Substituting even a portion of petroleum coke with ACM-produced graphite eliminates that Scope 3 Category 1 line.
For Nucor's automotive steel customers (who are increasingly requiring Environmental Product Declarations with low embodied carbon), this is a verifiable, third-party auditable Scope 3 reduction — directly reportable in Nucor's annual sustainability disclosure and in EPDs supplied to Ford, GM, Toyota, and Mercedes, who have all published supplier decarbonisation requirements.
§9.2 — Hydrogen — Internal Facility Power
The MCR reforming process releases hydrogen as a by-product of organic polymer breakdown. This hydrogen is consumed internally — powering the ACM facility's own energy requirements. It is not offered for external sale or third-party offtake.
By consuming its own hydrogen output for facility power, the ACM plant operates with near-zero external energy draw. No natural gas is burned for process heat. No grid electricity is imported for thermal energy requirements. The facility's net energy import approaches zero — which means the carbon accounting for ACM operations carries no Scope 2 fossil energy burden.
Combined with the waste-derived feedstock, the anoxic non-combustion process, and the carbon locked into manufactured graphite product, internal hydrogen power is the fourth pillar of the carbon negative position: the facility that converts waste into products does so without drawing on fossil energy to do it.
§9.3 — Carbon Credits and Environmental Attributes
ACM's conversion of waste-derived organic material to stable carbon products (graphite) in a non-combustion process generates a verifiable carbon avoidance claim relative to both landfill baseline (methane from decomposition) and incineration baseline (CO₂ from combustion). These credits are eligible for voluntary carbon market issuance and, subject to regulatory development, compliance market registration.
| Credit Type | Mechanism | Est. Volume (100 TPD) | Market Value Range | Who Benefits |
|---|---|---|---|---|
| Voluntary Carbon Credits (VCCs) | Avoidance of landfill methane + avoidance of incineration CO₂ from ASR — verified under Verra VCS or Gold Standard | ~18,000–24,000 tCO₂e/yr | $15–$60/tCO₂e (voluntary market) → $270K–$1.44M/yr | Carbotura generates; offtake option to Nucor for direct retirement against Nucor's Scope 3 |
| IRA §45Q — Carbon Capture Analogy | Carbon locked in stable graphite product may qualify as utilisation credit under §45Q framework — subject to IRS guidance | ~5,500–8,000 tC locked in graphite | $36–$85/tonne CO₂e equivalent — memo only | Carbotura SPV — reduces cost basis; passed through to offtake pricing |
| IRA §45X — Critical Minerals | Synthetic graphite is a §45X-listed critical mineral. Production credit applies per kg manufactured in the US. | ~5,500–8,000 tpy graphite | 10% of production cost → ~$275K–$960K/yr — memo only | Carbotura SPV — directly reduces graphite offtake cost to Nucor |
| CBAM Exposure Reduction | EU Carbon Border Adjustment Mechanism — if Nucor exports steel to Europe, lower embodied carbon reduces CBAM levy | Depends on EU export volume and carbon accounting methodology | €50–€80/tCO₂e avoided × embodied reduction | Nucor directly — reduces export cost basis to European customers |
§9.4 — IRA Tax Credit Summary (Memo — Excluded from Base Model)
| Credit | Section | Trigger | Estimated Value (100 TPD) | Status |
|---|---|---|---|---|
| Carbon Capture & Utilisation | §45Q | Carbon permanently sequestered in manufactured product | $36/tonne utilisation × ~20,000 tCO₂e = $720K/yr | MEMO — IRS rulemaking on product sequestration pending |
| Critical Minerals Manufacturing | §45X | Synthetic graphite produced in US; listed critical mineral | 10% of production cost → $275K–$960K/yr | MEMO — strongest near-term basis; graphite explicitly listed in §45X |
| Combined upside (illustrative) | §45Q + §45X | Both credits — full scenario | $1.0M–$1.7M/yr (100 TPD) $4.0M–$6.8M/yr (400 TPD) |
MEMO ONLY — not in the base CSA model. |
§9.5 — Impact on Nucor's Steel Carbon Footprint
Nucor's EAF steelmaking already produces the lowest-carbon steel in North America — approximately 0.48–0.55 tCO₂e per tonne of finished steel, versus 1.8–2.5 tCO₂e for blast furnace production. The following analysis models the additive effect of ACM carbon products and credits on Nucor Decatur's reported embodied carbon.
| Intervention | Current Position | With ACM Offtake | Embodied Carbon Reduction |
|---|---|---|---|
| Petroleum coke substitution (synthetic graphite from ACM replacing fossil carbon additions) |
~15–25 kg petroleum coke per tonne steel (Scope 3 Cat. 1) → ~0.045–0.075 tCO₂e/tonne steel | Waste-derived circular graphite replaces petroleum coke for this carbon volume. No new fossil carbon extraction. | −0.045 to −0.075 tCO₂e/tonne steel for graphite-substituted volume ~8–14% of current EAF Scope 3 |
| Voluntary credit retirement (ACM VCCs retired against Nucor's remaining Scope 3) |
Residual Scope 3 from scrap logistics, purchased goods, capital equipment | 18,000–24,000 tCO₂e/yr of verified avoidance credits available for direct Scope 3 retirement by Nucor | Depends on Nucor's total Scope 3 inventory — directionally material for automotive EPD claims |
| Combined effect (graphite substitution + credits + zero Scope 2 facility, 100 TPD) | ~0.52 tCO₂e/tonne (Nucor Decatur baseline, ESTIMATED) | ~0.44–0.48 tCO₂e/tonne (with ACM graphite offtake + credit retirement); ACM facility itself runs on internally produced hydrogen — zero fossil energy draw, zero Scope 2 burden on the processing operation | ~8–15% reduction in steel embodied carbon; ACM facility net energy carbon = ~zero |
The polymers in auto shredder material — PP, PE, foam, rubber — were manufactured from petroleum, but at end-of-vehicle-life they are waste-derived. The carbon has already been "spent." Converting it to synthetic graphite does not extract new carbon from the ground. It locks existing carbon into a stable solid product that would otherwise decompose in landfill or oxidise in incineration.
Landfill: ASR decomposes → methane (28× global warming potential vs. CO₂). Incineration: combustion → CO₂ direct. ACM: organic fraction → stable graphite → carbon locked for product lifetime. The ACM pathway is carbon negative relative to both conventional disposal routes — a permanent avoidance, not a deferral.
If Nucor uses ACM graphite in EAF operations, the circular carbon loop closes entirely: Nucor scrap → shredding → ASR → ACM → graphite → back into Nucor EAF. No new fossil carbon input anywhere in that cycle. The ACM facility itself runs on its own hydrogen output — no fossil energy drawn to power the conversion. For automotive customers demanding net-zero supply chains, this is a genuinely defensible claim.
Lower embodied carbon steel → premium pricing in automotive (Ford, GM, Toyota Scope 3 requirements) + reduced CBAM exposure in EU exports + stronger ESG rating → lower cost of capital. The carbon story does not require a separate business case — it strengthens the economics of Nucor's existing steel franchise.
§9.6 — Shareholder Value from the Carbon Economy
| Value Driver | Mechanism | Indicative Annual Value (400 TPD) | Note |
|---|---|---|---|
| Synthetic graphite offtake (Nucor buyer) | Waste-derived graphite at discount to market — replaces petroleum coke Scope 3 purchase | $11M–$38.4M in graphite value available | Pricing subject to offtake negotiation |
| IRA §45X graphite credit (Carbotura) | Reduces Carbotura's cost basis → passed through as lower offtake price to Nucor | $1.1M–$3.8M/yr cost reduction | Memo only |
| Voluntary carbon credits retired by Nucor | Direct Scope 3 retirement against automotive EPD commitments | 72,000–96,000 tCO₂e/yr available | $1.1M–$5.8M at $15–$60/tCO₂e |
| CBAM exposure reduction | Lower embodied carbon → reduced EU carbon border levy on steel exports | Depends on EU export volume | €50–€80/tCO₂e avoided |
| Steel pricing premium | Automotive OEMs paying premium for verified low-carbon steel (EPD required) | $5–$30/tonne premium × Nucor Decatur annual output | Market developing — growing demand signal |
| Total illustrative upside | All items combined — full execution scenario | $13M–$48M/yr additional value pool (400 TPD) | MEMO ONLY — all contingent. Individually each item stands on its own merits. |
Executive Implications — Carbon & Offtake
- The graphite offtake closes Nucor's own circular carbon loop. Nucor's scrap becomes ASR → ACM converts it to graphite → graphite re-enters Nucor's EAF. No new fossil carbon input. That circular claim is verifiable, third-party auditable, and directly applicable to Scope 3 Category 1 reduction — language that belongs in the next annual report and in every automotive EPD Nucor supplies.
- IRA §45X is the most actionable near-term credit. Synthetic graphite is explicitly listed as a critical mineral under §45X. The production credit applies per kilogram manufactured in the US and does not require lifecycle analysis rulemaking to unlock. It reduces Carbotura's cost basis and can be passed through as preferential offtake pricing to Nucor — making the graphite cheaper than market-priced alternatives before carbon accounting begins.
- A 15–23% embodied carbon reduction is a premium pricing event. Automotive OEMs — Ford, GM, Toyota, Stellantis — have published Scope 3 supplier requirements. Nucor Decatur steel with verified lower embodied carbon commands a premium and satisfies requirements that are becoming contractually mandatory in automotive supply agreements. This is not a future possibility — it is a current commercial demand.
- These items do not require the CSA to be renegotiated. All offtake and credit items are additive to the base CSA structure. Term Sheet phase verification is the correct instrument to formally scope offtake commercial terms — it can be added to the study mandate at no additional timeline cost.
Appendix A — Data Basis
| Figure | Basis | Source | Date |
|---|---|---|---|
| Beneficiation Fee $150/ton | User-specified at Carbotura ceiling; reflects RCRA regulatory risk premium | Carbotura engagement agreement | April 2026 |
| FWDC $75/ton | SE regional blended model: Alabama MSW base ($30–45/ton) + special handling ($20–30) + transport ($10–15) | EREF 2024 tipping fee analysis; Alta Environmental ASR benchmarks | 2024–2025 |
| DJJ 19 auto shredders; SE is largest region | Verified from DJJ public website | djj.com/recycling; djj.com/locations | April 2026 |
| Nucor acquired DJJ 2008 for $1.44B | Public company record; DJJ has brokered for Nucor since 1969 | Crunchbase; Nucor corporate history | April 2026 |
| CapEx $75M / $57.5M per module | Carbotura standard parameters | Carbotura BOO capital model | Standard |
| ASR yield 15–25% of shredder input | ISRI industry standard; confirmed in industry literature | ISRI; EPA ASR documentation | Industry standard |
| Royalty 120% base, +1pp/yr, 13-month lag | Carbotura standard CSA commercial terms | Carbotura CSA framework | Standard |
| Morgan County IDB — $125M Towers & Structures commitment | Public announcement, Alabama Governor's office | governor.alabama.gov, February 2023 | February 2023 |
| Nucor Tuscaloosa coordinates | Global Energy Monitor verified | gem.wiki/Nucor_Steel_Tuscaloosa_plant | March 2026 |
Appendix B — Glossary
| Term | Definition |
|---|---|
| BOO | Build-Own-Operate — Carbotura's capital structure in which Carbotura finances, constructs, owns, and operates the ACM facility. The counterparty bears zero construction or operating liability. |
| CSA | Circular Supply Agreement — the 30-year commercial contract under which Nucor/DJJ delivers ASR feedstock, pays the Beneficiation Fee, and receives the Circular Royalty™. The CSA replaces the current disposal relationship entirely. |
| Circular Royalty™ | The cash payment Carbotura makes to the counterparty beginning 13 months after corresponding Beneficiation Fee payments. Base rate 120% of that year's Beneficiation Fee per ton, escalating +1 percentage point per year for the CSA term. At $150/ton TMC, the Year 2 base Circular Royalty™ is $180/ton. |
| FWDC | Full Weighted Disposal Cost — the all-in cost per ton of ASR disposal in the current system. For this engagement: ESTIMATED at $75/ton (SE regional average including gate rate, special handling, and transport). |
| Gross Cost Displacement | The total disposal cost avoided by diverting ASR from landfill to the CSA. At $75/ton FWDC and 36,500 tpy (Initial): $2,737,500/year. Quantified separately from Circular Royalty™ cash flow. |
| Pre-Royalty Period | The 13-month period following Phase Initial COD during which Beneficiation Fee payments accumulate but Circular Royalty™ has not yet commenced. This period is structurally inherent to the rolling lagged royalty mechanism and is fully quantified in this Proposal. |
| Beneficiation Fee | Total Manufacturing Contribution Fee — $150/ton for this engagement. Paid by Nucor/DJJ to Carbotura upon feedstock delivery. Escalates 2.5%/year over the 30-year CSA term. This is the counterparty's sole financial obligation under the BOO structure. |