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Sulfur as a Selectivity Modifier in a Highly Active Rh/Fe 2 O 3 /ZrO 2 Catalyst for Water–Gas Shift
Author(s) -
Hakeem Abrar A.,
Rajendran Jaikishen,
Kapteijn Freek,
Makkee Michiel
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402161
Subject(s) - catalysis , sulfur , selectivity , rhodium , methane , chemistry , water gas shift reaction , inorganic chemistry , organic chemistry
The presence of small amounts of sulfur (<500 ppm) on a Rh/Fe 2 O 3 /ZrO 2 catalyst improves its water–gas shift (WGS) selectivity and stability under typical industrial conditions. Rh/Fe 2 O 3 /ZrO 2 is a highly active WGS catalyst, but it produces small amounts of methane as a side product. The formation of methane is due to the presence of rhodium in the catalyst. Sulfur selectively poisons the site(s) responsible for methane formation. The improved selectivity and prolonged stability of the catalyst is maintained as long as sulfur is present.