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Esterification of biomass pyrolysis model acids over sulfonic acid-functionalized mesoporous silicas

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Abstract.
Esterification of acetic acid with methanol, which was used as amodel reaction in the stabilization of biooil, was tested over propylsulfonic acid-functionalized SBA-15 materials. Due to the significant amount
of water content in bio-oil, the water tolerance properties of the materials were also investigated in
detail. The results showed that the functionalized mesoporous materials demonstrated a comparable
site activity to H2SO4 in acetic acid esterification proving its potential for application. The effect of
propylsulfonic acid loading showed that the intrinsic per site activity increased with the number of acid
sites, which suggested the presence of acidic site cooperativity. Water tolerance experiments showed
that SO3H-SBA-15 exhibited less reaction inhibition due to water than did H2SO4, which was at least
partially ascribed to the hydrophobic propyl groups bonded to sulfonic acid groups. Further
functionalization of SO3H-SBA-15 with hydrophobic propyl groups further increased the water
tolerance property of the catalyst in the esterification reaction. The reusability of the catalyst was also
investigated and showed multiple cycle stability for acetic acid esterification without significant loss of
activity.

Keywords: Acid-functionalized mesoporous silica, Organic–inorganic acidic catalyst, Bio-oil, Acetic acid esterification, Acidic sites cooperativity, Hydrophobic modification, Water effect

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Informasi Detail

Judul Seri

Applied Catalysis A: General

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Catalysis A: General 359 (2009) 113–120

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

Versi lain/terkait

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