Solutions
QET-Ethanol: Registry-Grade Low-Carbon Ethanol Certificates for LCFS, RFS, and RED III
For ethanol producers operating dry mill, wet mill, or cellulosic facilities; for LCFS pathway holders preparing CARB submissions; for blenders and fuel marketers moving E10, E15, or E85 through downstream channels; for transportation fuel buyers under multi-state low-carbon-fuel regimes; and for corporate biofuel procurement teams handling Scope 3 Category 3 disclosure on liquid fuel purchases, QET-Ethanol is the registry-grade environmental-attribute certificate engineered for the documentation discipline a 2026 ethanol pathway has to operate under. Each token represents 1 kg of verified anhydrous ethanol production — the mass-based functional unit the QET-Ethanol methodology specifies, aligned with EarnDLT's mass-based QET classification for chemical products, liquid fuels, and refined products. Carbon intensity is reported in kgCO₂e per gallon (the methodology's primary functional unit), in gCO₂e per MJ (the regulatory unit LCFS, RFS, and RED III pathway documentation requires), and in kgCO₂e per kg (per-token metadata) — all anchored under ISO 14064-3 reasonable-assurance verification on the EarnDLT blockchain registry.
QET-Ethanol, in one paragraph. QET-Ethanol is Greentruth's tokenized low carbon ethanol certificate — each token represents 1 kg of verified anhydrous ethanol production (1 gallon = 2.987 kg = 2.987 tokens, issued as whole kg units). Lifecycle carbon intensity is calculated against the methodology's primary per-gallon functional unit and reported in kgCO₂e/gallon (primary), gCO₂e/MJ (regulatory, for LCFS / RFS / RED III), and kgCO₂e/kg (per-token metadata). Verification runs under ISO 14064-3 reasonable assurance on the EarnDLT blockchain registry (Hedera Hashgraph). Methodology runs against R&D GREET 2025 for federal-default applications and CA-GREET 3.0 under the QET-LCFS extension. Mass-balance chain of custody handles the fungible-liquid-fuel commingling problem; framework-aligned exports at retirement satisfy LCFS pathway documentation, EPA RFS D6 RIN context, Oregon CFP, Washington CFS, EU RED III chain of custody, and GHG Protocol Scope 3 Category 3 disclosure simultaneously.
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See How an Ethanol Producer or LCFS Pathway Holder Uses QET-Ethanol
Request a demo and we'll walk a producer-side mint through ISO 14064-3 verification, the QET-LCFS extension package CARB expects, and the framework-aligned exports the retirement record produces.
What QET-Ethanol Actually Is (the Buyer's View)
This page is the buyer-side product positioning for QET-Ethanol. The eventual long-form QET-Ethanol Methodology page will be the SEO/GEO methodology explainer — what attributes the token carries, system boundaries, calculation conventions. Here, the focus is the procurement and compliance decision the LCFS pathway holder, the RFS-eligible producer, or the corporate Scope 3 buyer is actually making.
Three properties define the product for a buyer:
- One kilogram, mass-based, verified CI, audit-defensible. Each token represents 1 kg of verified anhydrous ethanol production. Lifecycle carbon intensity is calculated against the methodology's primary functional unit of one gallon of anhydrous ethanol at standard conditions (60°F, 1 atm), with the methodology version pinned immutably on the certificate. CI conversion uses IPCC AR5 GWP100 (CH₄ = 28, N₂O = 265). The verifier's ISO 14064-3 reasonable-assurance opinion sits on-chain alongside the mint, with verifier of record, lead verifier credentials, materiality threshold, and opinion date all preserved as immutable metadata.
- Built for the low-carbon-fuel regimes that actually impose pathway integrity. California LCFS pathway documentation, Oregon Clean Fuels Program, Washington Clean Fuel Standard, EPA Renewable Fuel Standard D6 RIN compliance, EU Renewable Energy Directive III chain-of-custody for downstream EU markets — the product is engineered to satisfy the documentation discipline each regime expects, with regime-specific extensions handling the differences in reference dataset, verifier accreditation, and submission packaging. CI is reported in the unit each regime expects: kgCO₂e/gallon as the primary producer/industry unit; gCO₂e/MJ as the regulatory unit for LCFS, RFS, and RED III; kgCO₂e/kg as per-token metadata.
- Procurement-ready as a registry-grade EAC. Acquisition, transfer, and retirement run through the same EarnDLT registry every other QET class does, with the same Machine-Ready API surface, the same framework-aligned exports at retirement, and the same unified Marketplace inventory across ethanol, natural gas, RNG, electricity, CCS, and solid fuel. Your team doesn't operate a parallel ethanol-only paperwork stack; the certificate surfaces alongside the rest of the portfolio.
Functional Unit and Token Representation
QET-Ethanol's unit structure is genuinely different from the energy-based QETs the rest of the portfolio uses. Producers, pathway holders, blenders, and corporate buyers need to read the certificate correctly on Day One — and the unit framework the methodology specifies is precise.
The functional unit. The QET-Ethanol methodology specifies one gallon of anhydrous ethanol (or volumetric equivalent in liters) at standard conditions (60°F, 1 atm) as the functional unit for lifecycle carbon intensity calculations. Carbon intensity is reported as kgCO₂e per gallon. This is the methodology's primary CI expression; every downstream unit conversion derives from it.
The token. Tokens are issued on a mass basis — one kilogram (1 kg) of verified anhydrous ethanol per token — aligned with EarnDLT's mass-based QET classification for chemical products, liquid fuels, and refined products. The mass-based structure is what lets the registry assess network infrastructure fees per kilogram of verified product mass, consistent with the rest of the mass-based QET family.
The conversion. The physical properties the methodology specifies: 1 gallon anhydrous ethanol = 3.78541 liters, density 0.789 kg/liter at 20°C, mass per gallon = 2.987 kg. Lower heating value: 76,330 BTU/gallon = 80.53 MJ/gallon. Practically:
- 1 gallon of anhydrous ethanol = 2.987 kg ≈ 2.987 tokens (issued as whole kg units)
- 1,000 gallons = 2,987 kg = 2,987 tokens
- A producer mint of 50,000 gallons issues ~149,350 QET-Ethanol tokens, each representing 1 kg of verified anhydrous ethanol
Because different downstream stakeholders require different CI units, the methodology specifies parallel expressions of the same underlying calculation:
- kgCO₂e per gallon — primary producer / industry unit (the functional unit).
- gCO₂e per MJ — regulatory unit (LCFS, RFS, RED) using LHV 80.53 MJ/gallon.
- kgCO₂e per kg — per-token metadata (used for token-level downstream reasoning).
- gCO₂e per kg — mass-specific scientific applications.
Each token carries all four expressions in its on-chain attribute schema, so a CARB pathway reviewer working in gCO₂e/MJ, a corporate Scope 3 system working in kgCO₂e/gallon, or a machine-readable compliance system reasoning over kgCO₂e/kg at the token grain — each sees the relevant expression directly without bridging math.
Who QET-Ethanol Is Built For
The buyer and producer population for low-carbon ethanol certificates is concentrated in five segments, each with distinct documentation needs that converge on the same underlying integrity discipline.
Ethanol Producers (dry mill, wet mill, cellulosic, sorghum)
Producers operating large dry mill corn-ethanol facilities, traditional wet mills, cellulosic facilities running on agricultural residues or dedicated energy crops, and sorghum-based operations seeking registry-grade attribute monetization. The certificate is the mint-side instrument; the producer's primary MRV data, methodology application, and verifier opinion flow into the token at issuance.
LCFS Pathway Holders
CARB-registered entities — producers, distributors, refiners, blenders — who file LCFS pathway applications and submit quarterly pathway data. Pathway holders have the most direct compliance exposure: they own the pathway and bear responsibility for the underlying data quality. QET-Ethanol with the QET-LCFS extension is structured around the documentation package CARB expects.
Blenders and Fuel Marketers
Companies moving E10, E15, and E85 through downstream channels under multi-state low-carbon-fuel regimes. The blender's ability to substantiate the carbon intensity of the ethanol fraction is increasingly relevant for downstream customer disclosure and for the regulatory regimes that look through the blender to the underlying ethanol attribute.
Transportation Fuel Buyers under Low-Carbon-Fuel Mandates
Fleet operators, marine fuel buyers (where ethanol-blended fuels apply), and road freight purchasers operating under CARB LCFS, Oregon CFP, Washington CFS, or analogous emerging regimes. The buyer-side documentation requirement increasingly tracks the pathway-side documentation the producer is generating.
Corporate Biofuel Procurement Teams
Companies running ethanol procurement as part of Scope 3 Category 3 disclosure under GHG Protocol — industrials with ethanol-based process inputs, retailers and consumer-goods companies with ethanol-blended-fuel exposure in their logistics footprint, and corporate sustainability programs targeting verified primary-data substitution for default upstream emission factors.
The LCFS, CFP, CFS, and RED III Pathway Architecture
Low-carbon ethanol pathway documentation operates across four major regulatory regimes that have steadily converged on similar integrity expectations. A single producer-side verification cycle produces outputs valid across multiple regulatory landings — CARB pathway application, Oregon CFP quarterly report, Washington CFS submission, RFS D6 RIN documentation, EU RED III mass-balance ledger — without requiring parallel verification engagements.
California LCFS (CARB)
The most operationally mature low-carbon-fuel regime in the world. Pathway holders submit pathway applications under CA-GREET 3.0, with primary-data MRV expectations, segment-level reporting, and CARB-approved verifier accreditation. The QET-LCFS extension runs QET-Ethanol against CA-GREET 3.0, produces the documentation set CARB expects on pathway applications, and integrates with quarterly pathway-data submission to CARB's LCFS Reporting Tool.
Oregon Clean Fuels Program (CFP) and Washington Clean Fuel Standard (CFS)
LCFS-analogous regimes operating under state DEQ / Department of Ecology authority, with their own pathway-application processes and CI-score conventions. A single QET-Ethanol mint with the appropriate methodology extension produces documentation valid across all three Pacific-coast regimes — eliminating the parallel paperwork stacks that multi-state ethanol marketers traditionally maintained.
EPA Renewable Fuel Standard (RFS)
Federal RFS pathway eligibility under D6 (renewable fuel) RIN for corn ethanol, D5 (advanced biofuel) for sugarcane and qualifying advanced pathways, and D7 (cellulosic) for cellulosic ethanol. QET-Ethanol carries the federal-default R&D GREET 2025 reference dataset version where the federal regime is the operative landing; the methodology integrates the relevant pathway eligibility metadata.
EU Renewable Energy Directive III (RED III)
For ethanol entering EU markets, RED III imposes chain-of-custody and mass-balance documentation expectations that align closely with the QET-Ethanol architecture. RED II/III's Annex IX-A treatment of cellulosic feedstocks creates specific documentation requirements for advanced ethanol pathways that QET-Ethanol carries as feedstock-attribute metadata on the token.
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Walk a Live LCFS Pathway Scenario
Request a demo and we'll trace a QET-Ethanol mint through CA-GREET 3.0, the QET-LCFS extension submission package, and the retirement record's framework-aligned exports across CARB, Oregon CFP, Washington CFS, RFS, and RED III.
The Integrity Architecture: Verification, Enforcement, Irrevocability
For LCFS pathway holders, RFS-eligible producers, and corporate buyers — and the verifiers and CARB pathway reviewers who eventually audit the underlying claim — the integrity of a QET-Ethanol mint and retirement depends on three structural properties operating together.
- ISO 14064-3 reasonable-assurance verification. Every mint requires an unmodified verification opinion under ISO 14064-3:2019 at reasonable-assurance level — the higher of the two assurance levels in the standard. The verifier must be accredited to ISO 14065:2020 by an acceptable accreditation body (ANAB, UKAS, DAkkS, INMETRO, or another International Accreditation Forum signatory) with sector-specific scope covering biofuel production and lifecycle assessment. For LCFS pathway documentation, CARB-approved verifier accreditation applies; the methodology aligns verifier engagement to CARB's expectations.
- Single-mint enforcement at the registry layer. One kilogram of verified anhydrous ethanol production issues exactly one QET-Ethanol token. The Hedera-anchored registry structurally rejects any attempt to issue a second token against the same verified kilogram — double-counting prevention operating at the infrastructure level, not the policy level. Migration in or out requires permanent cancellation in the prior registry first.
- Irrevocable on-chain retirement. When a buyer retires the certificate against a reporting claim — Scope 3 Category 3 disclosure, LCFS pathway substantiation, RFS RIN context, or EU RED III chain-of-custody — the closing event is permanent. The Hedera state machine writes the token's status to RETIRED and rejects any subsequent attempt to un-retire, re-trade, or re-use it. The retirement record is queryable, immutable, and traceable back through every transfer to the original mint and the verifier's reasonable-assurance opinion.
The Reference Dataset Choice: R&D GREET 2025 vs CA-GREET 3.0
For ethanol pathway documentation, the reference dataset choice is one of the most operationally consequential decisions on each mint — and the methodology pins the choice immutably on every token so downstream consumers can reason about the underlying lifecycle calculation directly.
Argonne National Laboratory's federal-default reference dataset, updated annually. The dataset the methodology runs against for federal-default applications — EPA RFS D6 / D5 / D7 RIN context, GHG Protocol Scope 3 Category 3 default reporting, SBTi target progress at the federal-default tier, and analogous national applications outside California. QET-Ethanol mints anchored to R&D GREET 2025 carry the version pin in the greetVersion field on the token; methodology updates do not retroactively apply to historical mints.
CARB's California-specific adaptation of the GREET model, used in LCFS pathway calculations. Applies different emission factor assumptions, allocation conventions, and indirect-land-use-change factors than the federal default. QET-Ethanol mints with the QET-LCFS extension run against CA-GREET 3.0 — the version pin is recorded on the token, and the resulting CI is the LCFS-eligible pathway value.
The practical implication for producers is that a single facility can produce QET-Ethanol mints under both reference datasets, with the version pin distinguishing which inventory clears LCFS pathway documentation and which clears federal-default applications. The Marketplace surfaces the two segments separately so LCFS-specific buyers and federal-default buyers can each find the relevant inventory through Discovery filters.
The practical implication for buyers is that the certificate they retire carries explicit reference-dataset attribution. An auditor or CARB pathway reviewer opening a QET-Ethanol retirement record can confirm directly which dataset was applied, eliminating the methodological-version litigation that traditionally complicated cross-jurisdiction ethanol attribute claims.
For the data-quality hierarchy and GREET methodology context
Mass-Balance Chain of Custody for Liquid Fuel Commingling
Ethanol is a fungible liquid commodity. Once it enters a blending terminal, a refinery, a transportation pipeline, or a downstream distribution system, individual molecules commingle entirely with conventional ethanol from other sources. Identity-preserved tracking is operationally impractical at scale, which is why the major regulatory regimes (LCFS, RFS, RED III) all recognize mass balance as the operative chain-of-custody discipline for ethanol.
QET-Ethanol implements mass-balance chain of custody under the same registry-grade discipline that applies to QET-NG and QET-RNG, with the natural reinforcement that the QET-Ethanol token is itself mass-based (1 kg per token). The principle is mechanical: total certificates outstanding for any verified production batch can never exceed the total verified physical mass of anhydrous ethanol that left the production facility. Single-mint enforcement at the registry layer makes this structural rather than contractual. The mass-based token structure means the volumetric reconciliation (gallons in / gallons out) and the mass reconciliation (kg in / kg out) collapse to the same ledger, with the methodology's 2.987 kg/gallon conversion preserved on every record.
For LCFS pathway holders, the mass-balance discipline aligns directly with CARB's pathway-integrity expectations. For RFS-context buyers, it satisfies the EPA RIN-generation chain-of-custody requirements. For EU RED III downstream offtakers, it produces the mass-balance ledger documentation the regime expects under Article 30 of RED III, with the operator-chain attribution and volumetric reconciliation preserved on-chain.
The same mass-balance ledger serves all four regulatory landings simultaneously. The pathway holder is not maintaining four parallel mass-balance documentation systems; a single registry-grade ledger produces the regime-specific exports each jurisdiction requires.
Multi-Feedstock Support: Corn, Sugarcane, Cellulosic, Sorghum
QET-Ethanol carries explicit feedstock attribution on every token, which matters substantially because different ethanol feedstocks produce different lifecycle CI profiles and qualify for different regulatory treatments. The Marketplace surfaces feedstock-specific inventory through Discovery filters.
Corn Ethanol
(dry mill and wet mill)
The dominant US ethanol pathway by volume. CI varies meaningfully by facility based on energy source (electricity vs natural gas vs cogeneration), process efficiency, and co-product credit allocation (DDGS treatment). Dry mill operations dominate the production base; wet mill operations remain a meaningful segment with distinct lifecycle calculations.
Sugarcane Ethanol
Primarily imported from Brazil, with CI profiles influenced by feedstock yield, sugarcane processing efficiency, and the indirect-land-use-change assumptions applied under the relevant reference dataset. Qualifies for advanced biofuel (D5) RIN under RFS where applicable.
Cellulosic Ethanol
Produced from agricultural residues (corn stover, wheat straw), dedicated energy crops (switchgrass, miscanthus), or forestry residues. Qualifies for cellulosic biofuel (D7) RIN under RFS and for Annex IX-A treatment under EU RED II/III. CI profiles are typically substantially lower than corn or sugarcane, with corresponding pathway-application premiums under LCFS.
Sorghum Ethanol
A growing pathway with distinct lifecycle characteristics. Qualifies for advanced biofuel context under RFS in certain configurations and produces CI profiles that depend significantly on feedstock yield and processing-energy choices.
Cross-Framework Alignment for the Disclosure Cycle
A QET-Ethanol retirement does not produce one disclosure output — it produces the framework-aligned exports the buyer's program needs across every reporting regime simultaneously. The same retirement event populates the relevant lines in:
- CARB LCFS pathway documentation with the CA-GREET 3.0-based CI, the verifier opinion reference, and the quarterly pathway-data submission metadata the LCFS Reporting Tool consumes.
- EPA RFS RIN context with the federal-default R&D GREET 2025 reference and the appropriate RIN category eligibility.
- EU RED III with the mass-balance ledger documentation under Article 30 and the Annex IX-A feedstock attribution where applicable.
- GHG Protocol Scope 3 Category 3 for upstream emissions of purchased ethanol, replacing default upstream factors with verified producer-specific carbon intensities.
- SBTi target progress where ethanol procurement is a material input to the corporate Scope 3 reduction trajectory.
- CSRD ESRS E1, IFRS S2, California SB 253, and TCR at the assurance tiers their phased schedules require, with the verified attribute as supporting documentation.
A single retirement event populates every framework's disclosure line simultaneously. The buyer is not running parallel paperwork workflows per disclosure regime; one retirement, one machine-readable export bundle, and the relevant payload flows to each framework's documentation cycle through the Machine-Ready API into ESG software (Watershed, Persefoni, Sweep, Workiva, or in-house GHG accounting systems).
For the cross-framework alignment in detail · For the Machine-Ready API surface
CARB LCFS Program · EPA Renewable Fuel Standard · European Commission RED III
Where QET-Ethanol Sits in the QET Family Portfolio
QET-Ethanol is not a standalone product line; it sits within the cross-token portfolio that defines the Greentruth Marketplace. For corporate procurement and pathway-holder programs running across multiple fuel types, that integration matters operationally.
QET-Ethanol
Low-CI ethanol in liquid-fuel applications (this page); LCFS pathway compliance, EU RED III chain of custody, federal-default Scope 3 Cat 3 substantiation.
QET-NG
Verified low-CI natural gas; Scope 3 Category 3 upstream-fuel disclosure with primary-data quality, with optional Physical Flow Certificate for EU Methane Regulation Article 28 chain-of-custody.
QET-RNG
Renewable natural gas substitution with full Compliance Passport five-point physical-delivery verification; Scope 1 fossil-CO₂ reduction under SBTi Criterion C11 biogenic exclusion.
QET-ELEC
Hourly-matched renewable electricity attribution under Scope 2 market-based.
QET-SOL
Negative-CI solid-fuel thermal energy from waste-stream feedstocks, designed for offset pairing with positive-CI QETs.
QET-CCS
Residual neutralization through geologically stored CO₂ at the long-term net-zero target year.
For an ethanol pathway holder that also operates natural-gas-fired ethanol plant utilities (most do), the cross-token portfolio matters directly. The facility's natural gas consumption can be addressed through QET-NG procurement; the resulting fuel-pathway documentation surfaces in the same retirement-record architecture as the QET-Ethanol production attestation. Single integrated workflow, multiple disclosure outputs.
What QET-Ethanol Is NOT
A few important boundaries to surface directly — these matter because ethanol pathway claims are where corporate and regulator review most often diverge on integrity expectations.
- Not interchangeable across reference datasets without explicit version pinning. A QET-Ethanol mint against R&D GREET 2025 is not equivalent to a mint against CA-GREET 3.0 for LCFS pathway purposes. The reference dataset is recorded on the token; the Discovery interface surfaces the two segments separately. Confusing federal-default tokens with LCFS-eligible tokens at retirement produces a documentation failure that CARB pathway review will catch.
- Not a substitute for primary MRV data. The methodology runs against whatever the producer's MRV stack actually produces. Industry-average secondary data produces lower-tier tokens; site-specific primary data produces higher-tier tokens. The MRV tier is recorded on the certificate and visible to every downstream buyer.
- Not a one-feedstock-equals-any-other-feedstock instrument. Feedstock type, RFS RIN category eligibility, and Annex IX-A status are recorded on each token. A buyer cannot retire a corn-ethanol token against a cellulosic claim, or a sugarcane token against a corn-specific procurement preference. The Discovery interface filters inventory by feedstock attribution.
- Not satisfied by limited-assurance verification. CARB LCFS pathway verification, EPA RFS pathway documentation, EU RED III chain-of-custody assertion, and the SBTi physical trace-and-claim attribution that downstream corporate buyers expect all operate under ISO 14064-3 reasonable assurance. Limited assurance is not sufficient.
- Not an energy-based token. QET-Ethanol is a mass-based token (1 kg of anhydrous ethanol per token), not an energy-based token (1 MMBtu of thermal energy). The methodology specifies a per-gallon CI functional unit for the lifecycle calculation, with gCO₂e/MJ as the regulatory expression where LCFS / RFS / RED III submissions require it — but the token issuance is per-kilogram, aligned with EarnDLT's mass-based QET classification for liquid fuels and refined products.
- Not a one-way commitment. Migration into and out of Greentruth is supported under Governance Framework §6.1.6 with the same verification, cancellation, and double-counting prevention discipline that governs every QET class. Pathway holders retain operational portability across registries where business or regulatory requirements call for it.
Frequently Asked Questions
One kilogram (1 kg) of verified anhydrous ethanol production — the methodology's mass-based functional unit. The lifecycle carbon intensity is calculated against the methodology's primary per-gallon functional unit and reported in kgCO₂e/gallon (primary), gCO₂e/MJ (regulatory, for LCFS / RFS / RED III), kgCO₂e/kg (per-token metadata), and gCO₂e/kg (mass-specific). Each token carries all four expressions plus the feedstock type, the reference dataset version (R&D GREET 2025 or CA-GREET 3.0), the methodology version pin, the verifier of record, and the immutable mint timestamp as on-chain metadata. Conversion factors: 1 gallon = 2.987 kg = 2.987 tokens; LHV 80.53 MJ/gallon.
Request a Demo
See How an Ethanol Producer or LCFS Pathway Holder Uses QET-Ethanol
Request a demo and we'll walk a live QET-Ethanol flow end to end — mint, acquisition, retirement, and the framework-aligned exports CARB / Oregon CFP / Washington CFS / EPA RFS / EU RED III submission channels expect.