A rhodium catalyst supported on AlPO 4 exhibited a much higher resistance to sulfur and phosphorus poisoning compared with a reference catalyst (Rh/Al 2 O 3 ). The acidic surface of AlPO 4 was effective in preventing the adsorption of sulfur oxides (SO 2 ), whereas Lewis acid/base sites on Al 2 O 3 favored SO 2 adsorption followed by the formation of sulfite, leading to deterioration of the activity of Rh/Al 2 O 3 for the model NO–CO–C 3 H 6 –O 2 reaction. Similarly, the AlPO 4 support suppressed the extent of phosphorus poisoning caused by dimethylphosphite (DMP) (CH 3 O) 2 POH, which was used as a model phosphorus source. A greater amount of inactive phosphate overlayers were deposited from the gas feed containing DMP and O 2 on Rh/Al 2 O 3 than Rh/AlPO 4 because of the reaction between P 2 O 5 vapors and Al 2 O 3 . Consequently, the active Rh surface was covered to a greater extent for Rh/Al 2 O 3 than Rh/AlPO 4 .
No takes yet. Share an insight, caveat, or question.
Buwono et al. (2015) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: