Deactivation behavior of a TiO2-added Pd catalyst in acetylene hydrogenation

Woo Jae Kim; Jung Hwa Kang; In Young Ahn; Sang Heup Moon

doi:10.1016/j.jcat.2004.05.017

Deactivation behavior of a TiO₂-added Pd catalyst in acetylene hydrogenation

Woo Jae Kim, Jung Hwa Kang, In Young Ahn, Sang Heup Moon

Department of Chemical Engineering & Materials Science

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

63 Scopus citations

Abstract

The deactivation behavior of a TiO₂-added Pd catalyst, reduced at 773 K, for the selective hydrogenation of acetylene showed that the added TiO₂ suppressed the formation of green oil and, consequently, improved the lifetime of the catalyst. The average number of carbon atoms per green oil molecule was smaller for the TiO₂-added catalyst than for the Pd-only catalyst because multiply coordinated Pd sites were suppressed on the TiO₂-added catalyst. The added TiO₂ also retarded the sintering of Pd particles during catalyst regeneration, presumably due to the anchoring effect of TiO₂, and suppressed green oil formation, even after the regeneration step.

Original language	English
Pages (from-to)	226-229
Number of pages	4
Journal	Journal of Catalysis
Volume	226
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2004.05.017
State	Published - 15 Aug 2004

Bibliographical note

Funding Information:
This work was supported by the Brain Korea 21 project and the National Research Laboratory program of Ministry of Science and Technology, Korea.

Keywords

Acetylene hydrogenation
Deactivation
Green oil
Pd
Sintering
TiO

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10.1016/j.jcat.2004.05.017

Cite this

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title = "Deactivation behavior of a TiO2-added Pd catalyst in acetylene hydrogenation",

abstract = "The deactivation behavior of a TiO2-added Pd catalyst, reduced at 773 K, for the selective hydrogenation of acetylene showed that the added TiO2 suppressed the formation of green oil and, consequently, improved the lifetime of the catalyst. The average number of carbon atoms per green oil molecule was smaller for the TiO2-added catalyst than for the Pd-only catalyst because multiply coordinated Pd sites were suppressed on the TiO2-added catalyst. The added TiO2 also retarded the sintering of Pd particles during catalyst regeneration, presumably due to the anchoring effect of TiO2, and suppressed green oil formation, even after the regeneration step.",

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note = "Funding Information: This work was supported by the Brain Korea 21 project and the National Research Laboratory program of Ministry of Science and Technology, Korea.",

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AU - Kim, Woo Jae

AU - Kang, Jung Hwa

AU - Ahn, In Young

AU - Moon, Sang Heup

N1 - Funding Information: This work was supported by the Brain Korea 21 project and the National Research Laboratory program of Ministry of Science and Technology, Korea.

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AB - The deactivation behavior of a TiO2-added Pd catalyst, reduced at 773 K, for the selective hydrogenation of acetylene showed that the added TiO2 suppressed the formation of green oil and, consequently, improved the lifetime of the catalyst. The average number of carbon atoms per green oil molecule was smaller for the TiO2-added catalyst than for the Pd-only catalyst because multiply coordinated Pd sites were suppressed on the TiO2-added catalyst. The added TiO2 also retarded the sintering of Pd particles during catalyst regeneration, presumably due to the anchoring effect of TiO2, and suppressed green oil formation, even after the regeneration step.

KW - Acetylene hydrogenation

KW - Deactivation

KW - Green oil

KW - Pd

KW - Sintering

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