Assertion: hydrogen sulfide | /r/HasProperty | removed before use
Facets:
value: almost completely
type: DEGREE
value: from natural gas streams
type: LOCATION
Source sentences:
text: Since hydrogen sulfide is corrosive in the presence of water and poisonous in very small concentrations, it must be almost completely removed from natural gas streams before use and preferably before transport or processing in oil field equipment, pipelines, and refineries.