Improvement of sulfur resistance of Pd/Ce-Zr-Al-O catalysts for CO oxidation
- Authors
- Shin, Haebin; Baek, Minsung; Ro, Youngsoo; Song, Changyeol; Lee, Kwan-Young; Song, In Kyu
- Issue Date
- 31-1월-2018
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- CO oxidation; Sulfur resistance; Pd catalyst; Ceria-Zirconia-Alumina
- Citation
- APPLIED SURFACE SCIENCE, v.429, pp.102 - 107
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SURFACE SCIENCE
- Volume
- 429
- Start Page
- 102
- End Page
- 107
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/77927
- DOI
- 10.1016/j.apsusc.2017.05.198
- ISSN
- 0169-4332
- 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. (C) 2017 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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