Improvement of sulfur resistance of Pd/Ce-Zr-Al-O catalysts for CO oxidation

Haebin Shin, Minsung Baek, Youngsoo Ro, Changyeol Song, Kwan Young Lee, In Kyu Song

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Two kinds of mesoporous ceria-zirconia-alumina supports were prepared by a single-step epoxide-driven sol-gel method (SGCZA) and by a co-precipitation method (PCZA). Palladium catalysts supported on these materials were then prepared by a wet impregnation method (Pd/SGCZA and Pd/PCZA). The prepared catalysts were applied to the CO oxidation reaction before and after sulfur aging. XRD and N2 adsorption-desorption analyses revealed that these two catalysts retained different physicochemical properties. Pd/SGCZA had higher surface area and larger pore volume than Pd/PCZA before and after sulfur aging. TPR (Temperature-programmed reduction), CO chemisorption, FT-IR, and XPS analyses showed that the catalysts were differently influenced by sulfur species. Pd/SGCZA formed less sulfate and retained higher palladium dispersion than Pd/PCZA after sulfur aging. In the CO oxidation, Pd/PCZA showed better activity than Pd/SGCZA before sulfur aging. However, Pd/SGCZA showed higher CO conversion than Pd/PCZA after sulfur aging. We concluded that Pd/SGCZA was less poisoned by sulfur species than Pd/PCZA.

Original languageEnglish
JournalApplied Surface Science
DOIs
Publication statusAccepted/In press - 2017 Mar 20

Fingerprint

Carbon Monoxide
Sulfur
Oxidation
Catalysts
Aging of materials
Palladium
Aluminum Oxide
Epoxy Compounds
Cerium compounds
Chemisorption
Coprecipitation
Catalyst supports
Impregnation
Zirconia
Sol-gel process
Sulfates
Desorption
Alumina
X ray photoelectron spectroscopy
Adsorption

Keywords

  • Ceria-Zirconia-Alumina
  • CO oxidation
  • Pd catalyst
  • Sulfur resistance

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Improvement of sulfur resistance of Pd/Ce-Zr-Al-O catalysts for CO oxidation. / Shin, Haebin; Baek, Minsung; Ro, Youngsoo; Song, Changyeol; Lee, Kwan Young; Song, In Kyu.

In: Applied Surface Science, 20.03.2017.

Research output: Contribution to journalArticle

Shin, Haebin ; Baek, Minsung ; Ro, Youngsoo ; Song, Changyeol ; Lee, Kwan Young ; Song, In Kyu. / Improvement of sulfur resistance of Pd/Ce-Zr-Al-O catalysts for CO oxidation. In: Applied Surface Science. 2017.
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AU - Baek, Minsung

AU - Ro, Youngsoo

AU - Song, Changyeol

AU - Lee, Kwan Young

AU - Song, In Kyu

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KW - Pd catalyst

KW - Sulfur resistance

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