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Good sulfur tolerance of a mesoporous Beta zeolite-supported palladium catalyst in the deep hydrogenation of aromatics

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Abstract.
The activities of a Pd catalyst supported on mesoporous Beta zeolite (Beta-H) were evaluated for
the hydrogenation of naphthalene and pyrene in the absence and presence of 200-ppm sulfur and
for the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT). Compared with
Pd/Al-MCM-41, the Pd/Beta-H catalyst exhibited better sulfur tolerance for hydrogenation of naphthalene
and pyrene and higher activity for HDS of 4,6-DMDBT. The ratio of the hydrogenation of the second ring
naphthalene in the absence and presence of 200-ppm sulfur for Pd/Beta-H was larger than that for Pd/Al-
MCM-41 (0.47 vs 0.19). The desulfurization effect of Pd/Beta-H was greater than that of Pd/Al-MCM-41
(51 vs 35%). The difference in sulfur tolerance and HDS ability of the 2 catalysts is attributed to the
difference in support acidity. Beta-H exhibited more acidic sites and a higher percentage of strong acidic
sites than Al-MCM-41 (552 μmol/g and 43% vs 291 μmol/g and 18%).

Keywords:
Mesoporous Beta zeolite
Palladium catalyst
Naphthalene
Pyrene
Hydrogenation
Sulfur tolerance
4,6-Dimethyldibenzothiophene
Hydrodesulfurization

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2008

Deskripsi Fisik

Journal of Catalysis 257 (2008) 125–133

Bahasa

English

ISBN/ISSN

00219517

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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