Mechanism and Primitive Description

The biomass-feedstock-diversity primitive is the input-side definition of the carbon-substrate-flow architecture. The downstream conversion process, pyrolysis, catalytic graphitization, or equivalent thermal decomposition pathway, accepts any input falling within one of the five admissible classes, converts the feedstock to a graphene-bearing carbon fraction, and emits a feedstock-attestation event that enters the lineage chain at its originating root. The primitive is class-defined rather than species-defined: a feedstock qualifies by virtue of belonging to one of the five classes, and species-level variation within a class is absorbed by the conversion-process tolerance.

Class one, agricultural residues, comprises by-products of crop production that are not the principal harvest: rice husks (the silica-rich outer hull separated during paddy milling), corn stover (the stalks, leaves, and cobs left after grain harvest), sugarcane bagasse (the fibrous residue after juice extraction), coconut shells (the lignified mesocarp separated during copra processing), and wheat straw (the cereal stem residue after grain threshing). Class two, forestry residues, comprises by-products of timber and pulpwood operations: sawdust from milling, wood chips from primary processing, bark from debarking, and slash (the limbs, tops, and small-diameter material) from logging operations.

Class three, food-processing waste, comprises by-products of post-harvest food production: spent coffee grounds, fruit pomace from juicing, nut shells from cracking and shelling, and brewery spent grain from malt mashing. Class four, municipal organic waste, comprises post-consumer organic streams diverted from landfill: yard trimmings, separated food waste, and waste paper. Class five, dedicated energy crops, comprises lignocellulosic crops grown specifically for biomass conversion: switchgrass (Panicum virgatum), miscanthus (Miscanthus × giganteus), and hybrid poplar (Populus spp.). Each class corresponds to a distinct upstream supply chain, a distinct credentialing body, and a distinct counterfactual baseline for the methane-avoidance credit.

Operating Parameters and Engineering Envelope

Conversion yield, ash content, and lignin fraction vary across classes, and the conversion-process envelope is parameterized to absorb the variation. Rice husks present approximately 15–20% silica ash, requiring an ash-tolerant pyrolysis configuration; sugarcane bagasse presents approximately 2–4% ash but high moisture content requiring pre-drying; sawdust presents low ash and low moisture but high fines content requiring dust-handling controls. The envelope of acceptable feedstock parameters is defined by the conversion process: moisture content typically below 15% at process inlet, particle size in a range admitting screw-feed transport (roughly 1–25 mm), and ash content below approximately 25%. Feedstocks outside any single bound can be brought into envelope by pre-treatment (drying, milling, ash separation).

Conversion yield to graphene-bearing carbon ranges from approximately 18% to 35% of dry feedstock mass, with energy crops (switchgrass, miscanthus) at the high end of the range and high-ash residues (rice husks) at the low end. Methane-avoidance credit varies by counterfactual: agricultural residues left in field exhibit low methane release in aerobic conditions and modest credit; municipal organic waste diverted from landfill exhibits high methane release under anaerobic landfill conditions and large credit; forestry residues left as slash exhibit intermediate behavior depending on pile geometry and moisture.

Regional availability sets the upper bound on each class's contribution to a given supply chain. Rice husks are concentrated in South and Southeast Asia (China, India, Indonesia, Vietnam, Thailand collectively contributing the majority of global production); sugarcane bagasse is concentrated in Brazil, India, and Thailand; forestry residues track temperate and boreal forest belts (Canada, the U.S. Pacific Northwest, Scandinavia, Russia); food-processing waste tracks population and industrial-food-processing capacity; municipal organic waste tracks urban density; dedicated energy crops track agronomic suitability for the relevant species. The five-class structure admits feedstock selection appropriate to the regional supply, removing the need to force a globally homogeneous feedstock chain.

Alternative Embodiments

Single-class embodiments use one feedstock class as the entire input: a southeast-Asian deployment may operate exclusively on rice husks; a Brazilian deployment may operate exclusively on sugarcane bagasse; a Pacific-Northwest deployment may operate exclusively on forestry residues. Multi-class embodiments blend classes to smooth seasonal variation: agricultural residues are seasonal at the harvest cycle, forestry residues are weather-dependent, and energy crops are perennial; a blended embodiment uses one class as base load and another as a seasonal complement.

Embodiments at the conversion-process layer include batch pyrolysis, continuous pyrolysis, and hydrothermal carbonization. Each conversion process imposes its own feedstock-parameter bounds, but the five-class admissibility surface persists across embodiments. The disclosed primitive does not bind any particular conversion technology; it binds the upstream side of the supply chain, and the choice of conversion process is an independent embodiment axis.

Composition with Adjacent Primitives

The feedstock-diversity primitive composes directly with the lifecycle-carbon-balance attestation primitive: each admissible feedstock class corresponds to a distinct credentialing body that issues the upstream sequestered-carbon attestation and the upstream methane-avoidance attestation feeding the composite balance. Forestry residues admit attestation by recognized forestry-certification bodies (FSC, SFI, PEFC); agricultural residues admit attestation by national or regional agricultural authorities and crop-traceability programs; food-processing waste admits attestation by the originating processor as a waste-stream certificate; municipal organic waste admits attestation by the municipal waste-management authority; energy crops admit attestation by the cultivator under standard agricultural traceability frameworks.

The primitive further composes with the carbon-bound-cell primitive disclosed under U.S. Provisional 64/052,368. The graphene fraction produced from any of the five feedstock classes can serve as the carbon framework for the disclosed sealed cell, inheriting the same upstream lineage and admitting the same composite attestation. This cross-primitive composition supports a unified carbon-substrate-flow surface across structural-material and energy-storage product lines.

Prior-Art Distinctions

Prior art in biomass-derived graphene production is largely single-class: published synthesis routes typically demonstrate a particular feedstock (for example, rice husks for silica-templated graphene, or coconut shells for activated-carbon precursors) without claiming a class-level admissibility surface. The disclosed primitive differs structurally by enumerating five classes as admissible inputs at the same level of disclosure, supporting genus-level claim coverage rather than species-level coverage. Prior-art biomass-supply-chain attestation systems (RSB, ISCC, REDcert) similarly tend to certify particular feedstock-pathway combinations rather than admitting a class-defined diversity at the primitive level.

The disclosed primitive also differs from prior-art landfill-diversion and waste-to-energy frameworks. Those frameworks treat the feedstock as fuel and account for combustion emissions; the disclosed primitive treats the feedstock as carbon stock and accounts for sequestration into a structural material. The lifecycle balance for a sequestration pathway is structurally distinct from the lifecycle balance for a combustion pathway, and the five-class admissibility surface disclosed here is specific to the sequestration-pathway accounting.

Disclosure Scope

The disclosure extends to any biomass feedstock falling within one of the five enumerated classes, without limitation to the species explicitly listed. Rice husks and wheat straw are explicitly listed examples within the agricultural-residues class, but the class admits any cereal, oilseed, or fiber-crop residue that satisfies the conversion-process envelope. Sawdust and slash are explicitly listed examples within the forestry-residues class, but the class admits any silvicultural by-product that satisfies the same envelope. The species listings are illustrative rather than exhaustive, and species-level variation within a class is within the disclosed scope.

The disclosure further extends to multi-class blends, to seasonal substitution within a class, and to regional supply-chain configurations selecting any subset of the five classes. The credentialed-origin attestation requirement is retained across all configurations: a feedstock entering the conversion process must carry a class-appropriate origin attestation, and the attestation enters the lineage chain at the originating root. Feedstocks lacking a credentialed attestation fall outside the disclosed scope regardless of their nominal class membership.

The five-class enumeration is intended as a closed list at the primitive level; embodiments adding a sixth class (for example, marine-algal feedstock) fall outside the disclosed primitive but may fall within an explicitly broadened genus claim in continuation practice. The parent provisional, U.S. Provisional Application 64/050,895, is incorporated by reference for the formal definitions of each class, the credentialing-body specifications, and the conversion-process envelope.

The disclosure addresses chain-of-custody requirements at the inter-class boundary. Where a feedstock could plausibly be classified into more than one class (for example, paper-based packaging waste that arrives via a municipal collection but originated as forestry-derived pulp), the originating-event attestation governs class membership: the class is fixed at the point at which the credentialed origin attestation is issued, and downstream re-routing through alternative collection systems does not reclassify the feedstock. This rule preserves the integrity of the upstream lineage chain in the lifecycle-balance attestation primitive.

The disclosure further addresses pre-treatment operations that occur upstream of the conversion process. Drying, milling, screening, washing, and ash separation are pre-treatment operations that may modify feedstock parameters without altering class membership, and feedstocks subjected to one or more pre-treatments remain within the disclosed scope. Pre-treatment operations are themselves subject to attestation and contribute to the embodied-carbon term of the downstream lifecycle balance, but they do not enter the class-membership determination, which is fixed at the originating-event level.

The disclosure is intended to be construed broadly to cover any biomass feedstock falling within one of the five enumerated classes, satisfying the conversion-process envelope, and entering the supply chain under a class-appropriate credentialed-origin attestation. Equivalents under the doctrine include feedstocks that satisfy the same class-defining structural and provenance criteria under different regional regulatory frameworks, provided the credentialing body is recognized within its jurisdiction and the attestation is verifiable on the lineage chain.

The disclosure also addresses transport-distance and supply-chain-resilience considerations as engineering attributes of the diversity primitive. Because the five admissible classes have non-overlapping geographic concentrations, a deployment can choose a primary class with the shortest available supply chain and a secondary class as a contingency for primary-supply disruption (drought-induced agricultural-residue shortfall, fire-disrupted forestry residues, processing-plant outage in food-processing waste, and so on). Supply-chain resilience is therefore a derived property of the class-diversity primitive, and the primitive's value at the operational level is not limited to any single class's availability profile.

The disclosure also contemplates traceability requirements at finer granularity than the class level. Where a registry consumer or a downstream regulatory framework requires species-level or origin-region-level traceability, the credentialed-origin attestation may be enriched with additional fields without affecting class membership. The minimum content of the attestation is the class identifier and the credentialing-body signature; additional fields (species, harvest date, harvest location, chain-of-custody document references) are optional under the disclosed primitive and become required under the registry consumer's policy as appropriate.