Per-product attribution: revenue net of product/credit royalty, minus directly attributable opex (H₂ feedstock share, synthesis or mineral electricity, and capture cost weighted by CO₂ share). The amortized license fee is a corporate overhead and is not allocated per product.
The JavaScript engine is verified against the Python reference engine (engine_v2.py) at page load. Tolerance: relative error < 10⁻⁹ for all eleven primary metrics across ten reference scenarios.
Each captured tCO₂ is assigned to exactly one downstream claim holder. The engine returns the mass-balance residual on every solve and rejects scenarios that would create double counting.
Every mass-balance step uses IUPAC atomic masses (C = 12.011, H = 1.008, O = 15.999, N = 14.007, Ca = 40.078, Mg = 24.305) and the canonical stoichiometric coefficients listed below. The engine reports the residual on every solve, and rejects scenarios above the configured tolerance.
- Single-holder claim ledger. Every captured tCO₂ is assigned to exactly one downstream claim holder, fuel (MeOH or e-SAF), mineral carbonate, CDR credit, reduction credit, CaaS host, or avoided emissions.
- Mass-balance enforcement. The engine returns a residual on every solve and rejects scenarios where |residual| exceeds 1e-6 tCO₂.
- No double counting. Routing splits are constrained to sum to 1.0 across all output pathways before economics are evaluated.
- Conservative defaults. Reference scenarios use the lower bound of published cost ranges for capture, hydrogen, and mineral feedstocks, and the upper bound for industrial royalties.
- Audit trail. Every run preserves inputs, intermediate quantities, costs, revenues, royalties, and the audit residual, ready for inclusion in an initial report.
| Reference | Scope |
|---|---|
| ISO 14064-2:2019 | Project-level GHG quantification, monitoring, and reporting. |
| ISO 14064-3:2019 | Verification and validation of GHG statements. |
| VCS v4 (Verra) | Voluntary carbon market methodology for engineered removals. |
| Puro Standard | Engineered CDR with permanent storage, mineralization pathways. |
| ICVCM Core Carbon Principles | Quality framework for high-integrity credits. |
| EU CBAM | Carbon Border Adjustment Mechanism, exporter quantification scope. |
| Saudi RVCMC | Regional Voluntary Carbon Market Company, credit issuance and registry. |
| NIST Chemistry WebBook | Thermochemistry and molecular weights for synthesis pathways. |
Pathway eligibility under any specific methodology is subject to pilot validation, MRV approval, and methodology issuance. RV-CMP outputs are screening-grade and should be reviewed by an accredited verification body before issuance.
The Verifier runs nine pass / fail integrity checks against the live scenario. Any failure flags the scenario for review and blocks issuance under the included MRV standards.
Each captured tCO₂ resolves to exactly one downstream claim holder. The Verifier confirms the allocation sums to the captured volume and that no single tCO₂ is claimed twice.