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Catalyst lifetime — distinguish deactivation routes

Build a catalyst-lifetime study with activity over time and complementary characterisation. Fouling, poisoning and sintering are competing explanations, not conclusions drawn from loss of conversion alone.

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{
  "nodes": [
    { "id": "fresh", "type": "rounded", "label": "Fresh catalyst reference", "x": 40, "y": 200, "width": 150, "height": 104, "fill": "#ede9fe", "stroke": "#6d28d9" },
    { "id": "run", "type": "rounded", "label": "Time-on-stream operation", "x": 215, "y": 200, "width": 150, "height": 104, "fill": "#fef3c7", "stroke": "#b45309" },
    { "id": "act", "type": "card", "label": "Activity / selectivity history", "x": 390, "y": 200, "width": 150, "height": 104, "fill": "#ccfbf1", "stroke": "#0f766e" },
    { "id": "foul", "type": "card", "label": "Deposited species analysis", "x": 565, "y": 40, "width": 150, "height": 104, "fill": "#ccfbf1", "stroke": "#0f766e" },
    { "id": "poison", "type": "card", "label": "Surface composition analysis", "x": 565, "y": 360, "width": 150, "height": 104, "fill": "#ccfbf1", "stroke": "#0f766e" },
    { "id": "sint", "type": "card", "label": "Particle / surface-area analysis", "x": 565, "y": 520, "width": 150, "height": 104, "fill": "#ccfbf1", "stroke": "#0f766e" },
    { "id": "compare", "type": "rounded", "label": "Compare fresh and used samples", "x": 740, "y": 200, "width": 150, "height": 104, "fill": "#fef3c7", "stroke": "#b45309" },
    { "id": "regen", "type": "octagon", "label": "Regeneration challenge", "x": 740, "y": 520, "width": 150, "height": 104, "fill": "#e0f2fe", "stroke": "#0369a1" },
    { "id": "cause", "type": "rounded", "label": "Supported deactivation explanation", "x": 915, "y": 200, "width": 150, "height": 104, "fill": "#fce7f3", "stroke": "#be185d" }
  ],
  "edges": [
    { "id": "e0", "source": "fresh", "target": "run", "label": "baseline" },
    { "id": "e1", "source": "run", "target": "act", "label": "track" },
    { "id": "e2", "source": "run", "target": "foul", "label": "used sample" },
    { "id": "e3", "source": "run", "target": "poison", "label": "used sample" },
    { "id": "e4", "source": "run", "target": "sint", "label": "used sample" },
    { "id": "e5", "source": "foul", "target": "compare", "label": "fouling evidence" },
    { "id": "e6", "source": "poison", "target": "compare", "label": "poisoning evidence" },
    { "id": "e7", "source": "sint", "target": "compare", "label": "sintering evidence" },
    { "id": "e8", "source": "act", "target": "compare", "label": "performance" },
    { "id": "e9", "source": "regen", "target": "cause", "label": "reversibility test" },
    { "id": "e10", "source": "compare", "target": "cause", "label": "integrate" }
  ]
}