About: http://webisa.webdatacommons.org/35373450

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They are, however, selective in favor of hydrogen over methane, with a selectivity of about 1 to 2, depending on grade, so are not preferred where methane build up in the loop is the greatest concern.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com