The presence of small amounts of sulfur (<500 ppm) on a Rh/Fe2O3/ZrO2 catalyst improves its water–gas shift (WGS) selectivity and stability under typical industrial conditions. Rh/Fe2O3/ZrO2 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.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.