The Effect of Sulphur on the Activity of Pd/Al2O3, Pd/CeO2 and Pd/ZrO2 Diesel Exhaust Gas Catalysts

Abstract

Pd/Al 2 O 3 , Pd/CeO 2 and Pd/ZrO 2 diesel oxidation catalysts and their washcoat materials were studied after sulphur treatment. The catalytic activities were analysed in simplified diesel exhaust gas composition by FT-IR technique. ICP-OES or XRF, physisorption and CO chemisorption was used to catalyst characterisation. The result shows that the sulphur treatment clearly deactivates the studied catalysts.

The Effect of Sulphur and Water Treatments on the Performance of Pd/β-Zeolite Diesel Oxidation Catalysts

“…In our previous studies, we have found that a small amount of sulphur on the catalyst surface has shown a deactivating effect on the catalyst performance due to sulphate species formation on studied catalyst materials, such as Pd-based Al 2 O 3 , CeO 2 , ZrO 2 [15,20] and Pt/Al 2 O 3 [21]. The decrease in the catalytic activity of S-and SW-treated Pd/ b-zeolite DOCs is observed in this study.…”

The Effect of SO2 and H2O on the Activity of Pd/CeO2 and Pd/Zr–CeO2 Diesel Oxidation Catalysts

“…The concentrations of feed and product gases were measured as a function of temperature every 5 s by Gasmet TM FT-IR gas analyser. Oxygen concentration was determined by using a paramagnetic oxygen analyser (ABB Advanced Optima) [4].…”

The Nanomorphology-Controlled Palladium-Support Interaction and the Catalytic Performance of Pd/CeO2 Catalysts

“…A complete CO conversion can be achieved at 130°C and more than 190°C over Pd/CeO 2 -NR and Pd/CeO 2 -NP, respectively. It is well-documented that Pd/CeO 2 catalysts generally exhibit higher activity than Pt/Al 2 O 3 catalysts for CO oxidation, which is due to the synergism of Pd with the support [4,18,19]. Here, compared the catalysts of the same support but with different morphology, it is believed that the differences in activity are related to the different interaction between Pd and CeO 2 .…”