Chemistry — Haber Process

{
  "elements":[
    {"data":{"id":"n2","label":"N2 (from air)"}},
    {"data":{"id":"h2","label":"H2 (from methane)"}},
    {"data":{"id":"mix","label":"Compress (200 atm)"}},
    {"data":{"id":"cat","label":"Iron catalyst (450C)"}},
    {"data":{"id":"nh3","label":"Ammonia"}},
    {"data":{"id":"cond","label":"Cool & condense"}},
    {"data":{"id":"recycle","label":"Recycle unreacted gas"}},
    {"data":{"source":"n2","target":"mix"}},
    {"data":{"source":"h2","target":"mix"}},
    {"data":{"source":"mix","target":"cat"}},
    {"data":{"source":"cat","target":"nh3","label":"reversible"}},
    {"data":{"source":"nh3","target":"cond"}},
    {"data":{"source":"cond","target":"recycle"}},
    {"data":{"source":"recycle","target":"cat"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}