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Acidity and catalytic activities of sulfated zirconia inside SBA-15

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Abstract.
SBA-15 containing various amount (10–50 wt.%) of highly dispersed ZrO2 is prepared using urea
hydrolysis method. The sulfated zirconia (ZrO2) in SBA-15 catalysts were prepared using these materials.
The materials were characterized by XRD, BET surface area, TEM, TGA, acidity measurements using in situ
IR pyridine adsorption, sulfate content and catalytic activities were studied for cumene cracking and
esterification of cyclohexanol. The Bro¨ nsted acidity, catalytic activity for cumene cracking and
esterification and sulfate content were found to pass through a maxima where ZrO2 loading is 35 wt.%.
The 35SZ-SBA catalysts exhibited 6.4 times higher activity for cumene cracking compared to the bulk SZ
catalysts. The relationship between acidity, sulfate content and catalytic activity are discussed in the light of existing knowledge on sulfated zirconia.

Keywords:
Sulfated zirconia
Bro¨nsted acidity
SBA-15
ZrO2-SBA-15
IR pyridine adsorption
Cumene cracking

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Informasi Detail

Judul Seri

Catalysis Today

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Catalysis Today 141 (2009) 125–129

Bahasa

English

ISBN/ISSN

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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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