{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp06_four_proposal_generalization60_20260803","cell_id":"catalytic_pathway_enablement__aviation_aeronautics","arm":"COMPLETE_PROPOSAL_PORTFOLIO","candidate_id":"regenerable_cabin_air_ozone_decomposition_bed","proposal_index":2,"version":0,"title":"Regenerable Ozone-Decomposition Bed for Aircraft Environmental-Control Air","problem":"During flight conditions in which ozone is present in environmental-control-system intake air, the available residence time and duct conditions may not reduce it to the operator's cabin-air target before distribution. The desired transformation—ozone into less reactive oxygen species—is physically feasible without changing the aircraft's air-quality objective, but can proceed too slowly along the untreated airflow path. Simply increasing airflow does not accelerate the transformation and can increase the amount entering the cabin. A reusable, selective conversion interface could lower the kinetic barrier, provided it does not create unacceptable pressure loss, particles, heat, or reaction byproducts.","actors":["Aircraft environmental-control-system engineers","Airframe integration engineers","Cabin-air-quality specialists","Materials and fire-safety engineers","Maintenance technicians","Flight and ground-test personnel","Operator engineering and continuing-airworthiness personnel","Authorized design-approval and airworthiness authorities","Crew members and occupants affected by cabin-air conditions"],"observable_state":"Paired measurements under defined operating conditions show ozone entering an environmental-control airflow segment and remaining at its outlet or cabin sampling point. The state is characterized by inlet and outlet ozone concentration, airflow, temperature, pressure, humidity, residence time, pressure drop, bypass leakage, catalyst-bed temperature, particle release, candidate byproducts, and conversion over repeated cycles. Declining conversion with unchanged nominal bed presence distinguishes catalyst deactivation from increased ozone loading or airflow bypass.","consequence":"Insufficient conversion can increase occupant and material exposure to an oxidizing contaminant or require operational restrictions. An underspecified converter could instead impose airflow losses, degrade unnoticed, release material, or transform other constituents into undesirable products.","affected_objective":"Maintain cabin-air quality under the aircraft's existing ventilation, pressurization, fire-safety, structural, and airworthiness constraints without relying on a consumable treatment input proportional to every unit of processed air.","intervention":"Develop a removable heterogeneous catalyst cartridge for a bounded environmental-control-system airflow interface. The cartridge immobilizes a candidate ozone-decomposition catalyst on a retained support while air passes through a geometry designed for uniform contact and controlled pressure drop. Eligibility is limited to a specified range of inlet composition, temperature, pressure, humidity, flow, and known contaminant loading. Sensors or scheduled ground checks track inlet-to-outlet conversion, pressure drop, temperature, bypass, and activity decay. A defined off-aircraft cleaning or conditioning sequence attempts to restore activity; a cartridge that fails recovery, selectivity, containment, or pressure-drop criteria is retired. Initial work remains a non-flight duct-rig experiment and does not authorize installation.","structural_mapping":[{"archetype_element":"Target transformation specification","domain_realization":"Convert ozone in a specified environmental-control air stream into an accepted outlet composition while preserving airflow, pressurization, material-containment, fire-safety, and cabin-air constraints."},{"archetype_element":"Activation barrier","domain_realization":"Ozone decomposition is feasible, but the untreated airflow path may provide insufficient reaction rate within its available residence time and operating envelope."},{"archetype_element":"Permitted pathway boundary","domain_realization":"Only catalytic conversion that preserves existing air-quality and aircraft-system requirements is in scope; dilution of measurements, reduced ventilation, uncontrolled heating, or production of harmful constituents is not."},{"archetype_element":"Reusable facilitator","domain_realization":"An immobilized catalyst cartridge remains separated from the treated air and is intended to process repeated air volumes across multiple operating cycles."},{"archetype_element":"Facilitator–substrate interface","domain_realization":"Duct geometry distributes eligible airflow across retained active surfaces with defined inlet composition, residence time, sealing, release, and outlet-monitoring conditions."},{"archetype_element":"Selectivity rule","domain_realization":"The bed must reduce the target ozone signal without unacceptable conversion of other representative air constituents, particle shedding, or new gaseous byproducts."},{"archetype_element":"Turnover capacity","domain_realization":"Useful ozone conversion per catalyst mass or active area is tracked across air volume, operating hours, loading changes, and regeneration cycles rather than inferred from cartridge presence."},{"archetype_element":"Substrate access condition","domain_realization":"Only air within validated composition, humidity, temperature, pressure, flow, aerosol, and contaminant bounds is treated as eligible for the catalytic pathway."},{"archetype_element":"Saturation and interference monitor","domain_realization":"Inlet loading, conversion, pressure drop, bypass, bed temperature, and cycle history reveal excessive flow, insufficient contact, fouling, or competing adsorption."},{"archetype_element":"Inhibitor or poison monitor","domain_realization":"Challenge testing and activity trends detect oils, cleaning residues, aerosols, humidity conditions, or other constituents that reversibly inhibit or cumulatively deactivate the catalyst."},{"archetype_element":"Facilitator regeneration cycle","domain_realization":"The cartridge is removed, inspected, cleaned or conditioned under a defined procedure, assayed against its ready-state criteria, and returned only if activity and integrity recover."},{"archetype_element":"Byproduct and side-pathway guardrail","domain_realization":"Outlet analysis, particle monitoring, thermal observation, and material inspection guard against unintended chemistry, shedding, hot spots, and downstream contamination."},{"archetype_element":"Equilibrium neutrality","domain_realization":"The catalyst is credited only with increasing the rate of an already feasible decomposition; it does not redefine acceptable cabin air or compensate for an infeasible ventilation design."},{"archetype_element":"Accountable catalyst steward","domain_realization":"The aircraft design organization owns cartridge specification, operating limits, test evidence, maintenance instructions, regeneration authorization, configuration control, and deactivation decisions."}],"mechanism_mapping":[{"mechanism_slug":"heterogeneous_catalyst_bed","role":"Immobilizes catalytic material at a controlled airflow interface so repeated air volumes contact it while the facilitator remains separable for inspection and regeneration.","counterfactual_removal":"Without an immobilized interface, catalytic material would require downstream recovery or could be carried into the cabin, undermining reuse, containment, and controlled residence time."},{"mechanism_slug":"catalyst_cofactor_system","role":"Maps the temperature, humidity, residence time, support material, sealing, and other enabling conditions required for catalytic activity and verifies their sufficiency before crediting the bed.","counterfactual_removal":"Without the complement map, apparent performance could depend on an unobserved operating condition that disappears in another flight regime, falsely attributing robustness to the catalyst."},{"mechanism_slug":"inhibitor_and_poison_screen","role":"Challenges inlet air and candidate contaminants before operational consideration, distinguishing reversible suppression from permanent activity loss.","counterfactual_removal":"Without upstream screening, a cartridge could remain visibly installed while oils, residues, aerosols, or incompatible constituents silently deactivate or corrupt it."},{"mechanism_slug":"active_site_capacity_dashboard","role":"Combines inlet loading, outlet conversion, airflow, pressure drop, temperature, bypass, and activity history to distinguish excessive substrate flow from catalyst degradation.","counterfactual_removal":"Without joint observability, declining outlet performance could be misdiagnosed, and nominal cartridge capacity could be trusted after its active capacity had fallen."},{"mechanism_slug":"catalyst_regeneration_protocol","role":"Specifies removal, inspection, restoration, recovered-activity testing, return-to-service criteria, and irreversible retirement thresholds.","counterfactual_removal":"Without measured regeneration, the cartridge would be treated as inexhaustible even if each cycle left cumulative fouling, damage, or selectivity loss."},{"mechanism_slug":"turnover_and_selectivity_assay","role":"Measures target conversion per facilitator unit over repeated cycles together with pressure loss, byproducts, particle release, and activity decay against an inert-bed baseline.","counterfactual_removal":"Without this assay, ozone loss caused by the rig, sampling system, dilution, or a consumed sorbent effect could be mistaken for reusable catalytic turnover."},{"mechanism_slug":"interface_contract_design","role":"Defines the cartridge envelope, inlet preconditions, outlet guarantees, measurement points, containment requirements, and configurations explicitly outside the validated boundary.","counterfactual_removal":"Without a stable interface contract, performance from one duct geometry or operating condition could be transferred to incompatible installations without preserving contact time or safeguards."},{"mechanism_slug":"small_safe_to_fail_probe","role":"Confines the initial test to an instrumented non-flight duct rig with controlled ozone, representative air constituents, bounded energy, and a physical bypass and shutdown.","counterfactual_removal":"Without a contained probe, pressure-drop, heat, deactivation, shedding, or side-reaction failures might first appear in an aircraft system where rollback is more difficult."}],"causal_chain":["A defined environmental-control air stream presents ozone within a measured temperature, pressure, humidity, composition, and flow envelope.","The inlet screen identifies whether the air and known contaminants fall inside the catalyst's compatibility boundary.","Duct geometry distributes eligible air across immobilized active surfaces for a controlled residence window.","The catalyst provides a lower-barrier decomposition pathway, increasing target conversion without being intentionally consumed with each processed air volume.","Treated air leaves the cartridge while the catalyst remains retained and ready for another airflow cycle.","Outlet composition, pressure drop, temperature, particles, and bypass are measured together so apparent ozone reduction cannot conceal side paths or system penalties.","Repeated-cycle assays estimate useful turnover and reveal activity loss, saturation, fouling, poisoning, or support damage.","When activity declines, the cartridge is removed and subjected to the defined regeneration protocol rather than operated on nominal status alone.","Recovered activity and integrity are tested; unsuccessful recovery triggers retirement rather than continued degraded use.","Only evidence of repeatable conversion, preserved selectivity, controlled pressure loss, containment, and successful recovery would justify consideration of a later governed integration study."],"baseline":"Use the same sealed duct rig, sensors, inlet mixture, flow schedule, temperature, pressure, humidity, and sampling sequence with an inert support cartridge matched for geometry and pressure drop but lacking the active catalyst. Include rig-only blank runs to quantify ozone loss in tubing and instrumentation. Compare target conversion, outlet composition, pressure drop, particles, thermal response, and persistence across cycles; do not substitute a fresh cartridge snapshot for a repeated-use baseline.","nearest_rivals":["Operational avoidance of atmospheric conditions associated with elevated inlet ozone; this changes aircraft routing or exposure rather than accelerating conversion in the airflow path.","Additional dilution or ventilation flow; this supplies more bulk air and may alter environmental-control capacity rather than catalyze ozone decomposition.","A consumable sorbent or reactive filter; this may remove ozone but requires treatment material in proportion to accumulated loading and lacks the defining regeneration and turnover cycle.","Redesign of the environmental-control intake or thermal path so ordinary system conditions destroy more ozone; this is a permanent system-path change rather than a removable reusable facilitator.","Repair of duct bypass or sampling faults; if residual ozone is caused by leakage or measurement error, restoring system integrity is the correct intervention and the catalytic proposal is unnecessary."],"remaining_contrastive_claim":"The intervention qualifies as catalytic only if retained active material repeatedly increases ozone decomposition relative to inert and rig-only controls, remains selective inside a defined airflow envelope, can be separated from the output, and returns to a verified ready state through regeneration. If ozone reduction instead results from dilution, wall loss, a consumable adsorption capacity, changed ventilation requirements, or easier test conditions, the catalytic explanation fails.","authority_safety":{"decision_authority":"The authorized aircraft design and airworthiness authorities retain all decisions about installation, certification basis, flight testing, maintenance instructions, and operational use. The laboratory lead may operate the bounded rig but cannot infer aircraft approval from rig performance.","authorized_first_step":"An environmental-control-system laboratory lead may authorize a non-flight, single-pass duct-rig study using controlled ozone concentrations, inert and active cartridges, representative nonhazardous air constituents, remote instrumentation, containment, and predefined shutdown criteria.","excluded_actions":["Installing or operating the cartridge on an aircraft","Using occupants or crew as exposure subjects","Reducing required ventilation or air-quality standards to improve apparent performance","Introducing unreviewed flammable, toxic, corrosive, or biologically active challenge substances","Crediting ozone conversion without calibrated inlet, outlet, blank, and inert-bed measurements","Returning a regenerated cartridge to testing without activity, containment, and pressure-drop checks","Operating beyond validated temperature, pressure, humidity, flow, composition, or ozone-loading bounds","Continuing after abnormal heating, particle shedding, containment loss, unexpected byproducts, or sensor disagreement","Treating laboratory results as design approval or return-to-service evidence"],"halt_rollback":"Automatically isolate ozone generation, divert flow through the rig bypass, and terminate the run upon containment loss, abnormal temperature rise, excessive pressure drop, particle release, unexpected outlet constituent, sensor disagreement beyond the predeclared tolerance, or failure of remote shutdown. Quarantine the cartridge and captured samples, ventilate or neutralize the rig under its laboratory procedure, preserve logs, and revert to inert blank testing. Resume active testing only after the laboratory safety owner identifies the cause and reauthorizes the setup."},"negative_tests":{"strongest_counterevidence":"Calibrated blank and inert-bed measurements show that the environmental-control path already reduces ozone to the target throughout the relevant envelope, or that the apparent residual signal arises from sampling artifacts, bypass leakage, or a source downstream of the proposed cartridge location. A separate strong challenge would be evidence that the candidate material removes ozone only through finite adsorption or stoichiometric consumption rather than repeated catalytic conversion.","problem_falsifier":"Across the bounded operating envelope, verified inlet ozone does not persist at the candidate interface's outlet long enough to create a target-state gap, or the required outlet state is infeasible without violating ventilation, pressure-drop, temperature, fire-safety, or material constraints.","intervention_falsifier":"Relative to rig-only and inert-bed controls, the active cartridge shows no attributable repeated-cycle conversion; loses activity without recoverable regeneration; exceeds the allowed pressure drop; sheds material; creates an unacceptable thermal response or outlet constituent; cannot tolerate representative operating variation; or depends on a consumable complement that scales with processed ozone.","risks":["Catalyst or support particles could enter downstream air.","The cartridge could impose unacceptable pressure drop or alter environmental-control-system flow distribution.","Reaction heat or local hot spots could create material or fire-safety concerns.","The catalyst could transform non-target air constituents into undesirable products.","Oils, aerosols, cleaning residues, humidity, or other contaminants could inhibit or permanently poison active sites.","Flow channeling or seal bypass could create nonuniform treatment hidden by a single outlet measurement.","Sampling surfaces or sensor cross-sensitivity could mimic catalytic conversion.","Regeneration could restore nominal conversion while damaging containment or selectivity.","A finite adsorption effect could be misclassified as catalytic turnover.","Maintenance could reinstall an incorrect, expired, contaminated, or incompletely regenerated cartridge.","Monitoring could cover laboratory variables while missing an aircraft-specific interferent or transient.","A successful rig result could encourage premature extrapolation beyond the tested interface and operating envelope."]},"next_evidence_step":"Build one sealed single-pass duct section with interchangeable inert and active cartridges and calibrated upstream and downstream sampling. Test three independently prepared active specimens and matched inert supports through no more than 30 controlled exposure-and-rest cycles each across a predeclared matrix of flow, temperature, pressure, and humidity. Include blank runs, randomized cartridge order, representative benign interferent challenges, pressure-drop and temperature monitoring, particle capture, and a predefined outlet screen for candidate byproducts. After induced activity decline, apply one documented off-rig regeneration sequence and repeat the initial assay. Precommit halt criteria and report conversion, activity retention, recovered activity, pressure loss, selectivity observations, and material balance at the specimen level without extrapolating to flight performance.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"Earlier proposal 1 addressed a procedural configuration-evidence bottleneck after routine avionics replacement using a versioned data interface, automation, templates, and a specialist review lane. This proposal addresses a different physical problem: insufficient ozone-decomposition rate in an aircraft environmental-control airflow path. Its reusable facilitator is an immobilized material cartridge rather than an informational and human service; its substrate is an air stream rather than maintenance cases; its causal path is molecular conversion through repeated active-site contact rather than evidence reconciliation; its failure modes center on pressure drop, poisoning, byproducts, heat, shedding, and material regeneration rather than record quality, scope routing, or signatory workload. It can be researched, rejected, adopted, maintained, and governed independently of the configuration-conformity lane.","revision_record":{"parent_version":null,"progress_targets_addressed":[],"conceptual_changes":[],"operational_changes":[],"evidence_changes":[],"claim_changes":[]}}