Chemistry — Contact Process

{
  "elements":[
    {"data":{"id":"s","label":"Sulfur"}},
    {"data":{"id":"so2","label":"SO2"}},
    {"data":{"id":"v2o5","label":"V2O5 catalyst (450C)"}},
    {"data":{"id":"so3","label":"SO3"}},
    {"data":{"id":"oleum","label":"Oleum (H2S2O7)"}},
    {"data":{"id":"h2so4","label":"Sulfuric acid"}},
    {"data":{"source":"s","target":"so2","label":"+ O2"}},
    {"data":{"source":"so2","target":"v2o5"}},
    {"data":{"source":"v2o5","target":"so3","label":"+ O2"}},
    {"data":{"source":"so3","target":"oleum","label":"absorb in H2SO4"}},
    {"data":{"source":"oleum","target":"h2so4","label":"+ water"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}