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

doi:10.1016/j.apsusc.2017.05.198

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

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

20 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 N ₂ 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 language	English
Pages (from-to)	102-107
Number of pages	6
Journal	Applied Surface Science
Volume	429
DOIs	https://doi.org/10.1016/j.apsusc.2017.05.198
Publication status	Published - 2018 Jan 31

Keywords

CO oxidation
Ceria-Zirconia-Alumina
Pd catalyst
Sulfur resistance

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.apsusc.2017.05.198

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title = "Improvement of sulfur resistance of Pd/Ce–Zr–Al–O catalysts for CO oxidation",

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 N 2 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. ",

keywords = "CO oxidation, Ceria-Zirconia-Alumina, Pd catalyst, Sulfur resistance",

author = "Haebin Shin and Minsung Baek and Youngsoo Ro and Changyeol Song and Lee, {Kwan Young} and Song, {In Kyu}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP) ( NRF-2016R1A5A1009592 ). Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

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day = "31",

doi = "10.1016/j.apsusc.2017.05.198",

language = "English",

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journal = "Applied Surface Science",

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T1 - Improvement of sulfur resistance of Pd/Ce–Zr–Al–O catalysts for CO oxidation

AU - Shin, Haebin

AU - Baek, Minsung

AU - Ro, Youngsoo

AU - Song, Changyeol

AU - Lee, Kwan Young

AU - Song, In Kyu

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP) ( NRF-2016R1A5A1009592 ). Publisher Copyright: © 2017 Elsevier B.V.

PY - 2018/1/31

Y1 - 2018/1/31

N2 - 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 N 2 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.

AB - 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 N 2 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.

KW - CO oxidation

KW - Ceria-Zirconia-Alumina

KW - Pd catalyst

KW - Sulfur resistance

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JO - Applied Surface Science

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ER -

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

Abstract

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