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Sustainable production of acrolein: Preparation and characterization of zirconia-supported 12-tungstophosphoric acid catalyst for gas-phase dehydration of glycerol

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Abstract
ZrO2-supported H3PW12O40 (HPW) catalysts were used to catalyze the dehydration of glycerol to produce
acrolein at 315 8C under a high space velocity (GHSVGlycerol = 400 h1). The catalysts were prepared by
varying the loading of HPW on two ZrO(OH)2 supports of different preparations, followed by calcination
in flowing nitrogen. The use of alcogel-derived ZrO(OH)2-AN for the support, compared with
conventional hydrogel-derived ZrO(OH)2-CP, produced HPW/ZrO2 catalysts that showed higher surface
areas and better catalytic performance for the selective formation of acrolein from glycerol dehydration.
Independent of the preparation history of ZrO2, the Keggin-anion density (HPW nm2) at the catalyst
surface appeared as a key to the selectivity and mass-specific activity of HPW for acrolein production.
Acrolein selectivity as high as 70 mol% was obtained over the catalysts having the intermediate densities
(0.18–0.65 HPW nm2), at which most of the Keggin HPW remained intact after calcination up to 650 8C.
At higher densities, destruction of the KegginHPWwould occur during the calcination, which led to lower
acrolein selectivity. High selectivity (71 mol%) and high yield (>54%) for acrolein production were found
sustainable over the best performing HPW/ZrO2-AN catalyst for reaction times up to 10 h.

Keywords: Glycerol (glycerin), Alcohol dehydration, Acrolein, Heteropoly acid (H3PW12O40), ZrO2

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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 353 (2009) 213–222

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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