Zirconia catalysts (ZrO<inf>2</inf> and Na-ZrO<inf>2</inf>) for the conversion of phenethyl phenyl ether (PPE) in supercritical water

Hee Jun Eom, Min Sung Kim, Dae Won Lee, Yoon Ki Hong, Gwangsik Jeong, Kwan Young Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this study, the mesoporous ZrO<inf>2</inf> and Na-ZrO<inf>2</inf> were examined as heterogeneous solid catalysts under supercritical water for the β-ether bond scission of phenethyl phenyl ether (PPE). Na-ZrO<inf>2</inf> was more efficient than ZrO<inf>2</inf> in the dissociation of PPE. Yields of phenol and styrene were 39% and 16%, respectively, under 97% PPE conversion when 2.5 wt.% of Na-ZrO<inf>2</inf> catalyst was applied to a batch reactor filled with supercritical water (400 °C, 20 bar H<inf>2</inf> (initial pressure)) containing 2.5 wt.% PPE. The characterization revealed that the activities of ZrO<inf>2</inf> and Na-ZrO<inf>2</inf> were closely associated with the textural and acid/base properties of the catalysts. Notably, the reaction pathway and product distribution were determined by the concentration of acid and base sites on the catalyst's surface.

Original languageEnglish
Pages (from-to)149-157
Number of pages9
JournalApplied Catalysis A: General
Volume493
DOIs
Publication statusPublished - 2015 Mar 5

Fingerprint

Zirconia
Ethers
Catalysts
Water
Acids
Styrene
Batch reactors
Phenol
Ether
Phenols
zirconium oxide
phenyl ether

Keywords

  • Lignin
  • Na-ZrO<inf>2</inf>
  • Phenethyl phenyl ether
  • Supercritical water
  • β-Ether bond

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Zirconia catalysts (ZrO<inf>2</inf> and Na-ZrO<inf>2</inf>) for the conversion of phenethyl phenyl ether (PPE) in supercritical water. / Eom, Hee Jun; Kim, Min Sung; Lee, Dae Won; Hong, Yoon Ki; Jeong, Gwangsik; Lee, Kwan Young.

In: Applied Catalysis A: General, Vol. 493, 05.03.2015, p. 149-157.

Research output: Contribution to journalArticle

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AU - Eom, Hee Jun

AU - Kim, Min Sung

AU - Lee, Dae Won

AU - Hong, Yoon Ki

AU - Jeong, Gwangsik

AU - Lee, Kwan Young

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N2 - In this study, the mesoporous ZrO2 and Na-ZrO2 were examined as heterogeneous solid catalysts under supercritical water for the β-ether bond scission of phenethyl phenyl ether (PPE). Na-ZrO2 was more efficient than ZrO2 in the dissociation of PPE. Yields of phenol and styrene were 39% and 16%, respectively, under 97% PPE conversion when 2.5 wt.% of Na-ZrO2 catalyst was applied to a batch reactor filled with supercritical water (400 °C, 20 bar H2 (initial pressure)) containing 2.5 wt.% PPE. The characterization revealed that the activities of ZrO2 and Na-ZrO2 were closely associated with the textural and acid/base properties of the catalysts. Notably, the reaction pathway and product distribution were determined by the concentration of acid and base sites on the catalyst's surface.

AB - In this study, the mesoporous ZrO2 and Na-ZrO2 were examined as heterogeneous solid catalysts under supercritical water for the β-ether bond scission of phenethyl phenyl ether (PPE). Na-ZrO2 was more efficient than ZrO2 in the dissociation of PPE. Yields of phenol and styrene were 39% and 16%, respectively, under 97% PPE conversion when 2.5 wt.% of Na-ZrO2 catalyst was applied to a batch reactor filled with supercritical water (400 °C, 20 bar H2 (initial pressure)) containing 2.5 wt.% PPE. The characterization revealed that the activities of ZrO2 and Na-ZrO2 were closely associated with the textural and acid/base properties of the catalysts. Notably, the reaction pathway and product distribution were determined by the concentration of acid and base sites on the catalyst's surface.

KW - Lignin

KW - Na-ZrO<inf>2</inf>

KW - Phenethyl phenyl ether

KW - Supercritical water

KW - β-Ether bond

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