Layered MWW zeolite-supported Rh catalysts for the hydrodeoxygenation of lignin model compounds

Ji Sun Yoon, Taehee Lee, Jae Wook Choi, Dong Jin Suh, Kangtaek Lee, Jeong Myeong Ha, Jungkyu Choi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The improved catalytic activity of Rh nanoparticles deposited on the swollen and pillared zeolites was observed in the hydrodeoxygenation (HDO) reactions of 1,3,5-trimethoxybenzene (1,3,5-TMB), a bulky lignin model compound, and guaiacol, one of the most frequently used lignin model compounds. As the high dispersion of metal nanoparticles increases HDO activity, the swelling/calcination and pillaring of crystalline MCM-22 zeolites increased the dispersion of Rh metal nanoparticles on the external surface area, and thus the corresponding HDO activity with respect to 1,3,5-TMB. On the contrary, although the mesopores in the amorphous MCM-41 and silica-alumina aerogel (SAA) supports accommodated higher Rh dispersion, overall, the resulting catalysts suffered from mass transfer limitation, and thus showed poor HDO reaction activity for 1,3,5-TMB. Finally, the Rh nanoparticles supported on the pillared zeolite showed the highest HDO activity for guaiacol, mainly due to the higher Rh dispersion and acid sites on the external surface among the zeolite-supported Rh catalysts.

Original languageEnglish
Pages (from-to)142-150
Number of pages9
JournalCatalysis Today
Volume293-294
DOIs
Publication statusPublished - 2017 Sep 15

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Zeolites
Lignin
Catalyst supports
Guaiacol
Metal nanoparticles
Multicarrier modulation
Nanoparticles
Aerogels
Aluminum Oxide
Silicon Dioxide
Calcination
Swelling
Catalyst activity
Alumina
Mass transfer
Silica
Crystalline materials
Catalysts
Acids
5-(N,N-diethylamino)pentyl-3,4,5-trimethoxybenzoate

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Yoon, Ji Sun ; Lee, Taehee ; Choi, Jae Wook ; Suh, Dong Jin ; Lee, Kangtaek ; Ha, Jeong Myeong ; Choi, Jungkyu. / Layered MWW zeolite-supported Rh catalysts for the hydrodeoxygenation of lignin model compounds. In: Catalysis Today. 2017 ; Vol. 293-294. pp. 142-150.
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Layered MWW zeolite-supported Rh catalysts for the hydrodeoxygenation of lignin model compounds. / Yoon, Ji Sun; Lee, Taehee; Choi, Jae Wook; Suh, Dong Jin; Lee, Kangtaek; Ha, Jeong Myeong; Choi, Jungkyu.

In: Catalysis Today, Vol. 293-294, 15.09.2017, p. 142-150.

Research output: Contribution to journalArticle

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AU - Lee, Taehee

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AU - Lee, Kangtaek

AU - Ha, Jeong Myeong

AU - Choi, Jungkyu

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AB - The improved catalytic activity of Rh nanoparticles deposited on the swollen and pillared zeolites was observed in the hydrodeoxygenation (HDO) reactions of 1,3,5-trimethoxybenzene (1,3,5-TMB), a bulky lignin model compound, and guaiacol, one of the most frequently used lignin model compounds. As the high dispersion of metal nanoparticles increases HDO activity, the swelling/calcination and pillaring of crystalline MCM-22 zeolites increased the dispersion of Rh metal nanoparticles on the external surface area, and thus the corresponding HDO activity with respect to 1,3,5-TMB. On the contrary, although the mesopores in the amorphous MCM-41 and silica-alumina aerogel (SAA) supports accommodated higher Rh dispersion, overall, the resulting catalysts suffered from mass transfer limitation, and thus showed poor HDO reaction activity for 1,3,5-TMB. Finally, the Rh nanoparticles supported on the pillared zeolite showed the highest HDO activity for guaiacol, mainly due to the higher Rh dispersion and acid sites on the external surface among the zeolite-supported Rh catalysts.

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