Conversion of Glycerol to Acrolein in the Presence of WO3/ZrO2 Catalysts

Ulgen, Arda; Hoelderich, Wolfgang F.

doi:10.1007/s10562-009-9923-0

Cited by 124 publications

(78 citation statements)

References 8 publications

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“…Supported WO 3 , MoO 3 , V 2 O 5 , and H 3 PO 4 catalysts are well known as the acid catalysts for many kinds of reactions [53][54][55][56]. For example, ZrO 2 -supported WO 3 catalyst and active carbonsupported H 3 PO 4 are effective for the dehydration of glycerol to form acrolein [53,54]; ␥-Al 2 O 3 -supported V 2 O 5 and MoO 3 are effective for the selective oxidation of methanol to form dimethoxymethane and methyl formate [55,56].…”

Section: Effect Of the Acidic Substance In Cu/al 2 O 3 Catalyst In Thmentioning

confidence: 99%

“…For example, ZrO 2 -supported WO 3 catalyst and active carbonsupported H 3 PO 4 are effective for the dehydration of glycerol to form acrolein [53,54]; ␥-Al 2 O 3 -supported V 2 O 5 and MoO 3 are effective for the selective oxidation of methanol to form dimethoxymethane and methyl formate [55,56]. In our recent paper, amorphous WO 3 supported on silica is prepared for the dehydration of 1,2-PDO into PA [49].…”

Section: Effect Of the Acidic Substance In Cu/al 2 O 3 Catalyst In Thmentioning

confidence: 99%

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Efficient production of propylene in the catalytic conversion of glycerol

Sun

Yamada

Sato

2015

Applied Catalysis B: Environmental

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Section: Effect Of the Acidic Substance In Cu/al 2 O 3 Catalyst In Thmentioning

confidence: 99%

Section: Effect Of the Acidic Substance In Cu/al 2 O 3 Catalyst In Thmentioning

confidence: 99%

Efficient production of propylene in the catalytic conversion of glycerol

Sun

Yamada

Sato

2015

Applied Catalysis B: Environmental

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“…35 Although the conversion could reach 100% in some cases, the selectivity to acrylic acid was not more than 1%, with acrolein, acetaldehyde and acetol as main products. Ulgen and Hoelderich 36,37 have studied the glycerol oxydehydration over supported tungsten oxide. Although the observed conversions were high, the selectivity to acrylic acid was below 5%, with acrolein being the main product.…”

Section: Introductionmentioning

confidence: 99%

Oxidative dehydration of glycerol to acrylic acid over vanadium-impregnated zeolite beta

Pestana¹,

Guerra²,

Ferreira³

et al. 2013

J. Braz. Chem. Soc.

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A desidratação oxidativa do glicerol a ácido acrílico foi estudada com o uso de zeólita Beta impregnada com vanádio. Os catalisadores foram preparados por impregnação úmida do metavanadato de amônio sobre a zeólita Beta na forma amoniacal, seguida de calcinação em ar a 823 K. A impregnação reduziu a área superficial específica, mas não afetou significativamente a acidez (Brønsted e Lewis) da zeólita. A avaliação dos catalisadores foi realizada num reator de leito fixo usando ar como gás de arraste e injetando o glicerol por meio de uma bomba seringa. Acroleína foi o principal produto formado, tendo também sido observados acetaldeído e hidróxi-acetona (acetol). O ácido acrílico foi formado em aproximadamente 25% de seletividade a 548 K sobre as zeólitas impregnadas. O resultado pode ser explicado por análises de XPS (espectroscopia fotoeletrônica de raios X), que mostraram uma boa dispersão de vanádio nos poros da zeólita.The oxidative dehydration of glycerol to acrylic acid was studied over vanadium-impregnated zeolite Beta. Catalysts were prepared by wet impregnation of ammonium metavanadate over ammonium-exchanged zeolite Beta, followed by air calcination at 823 K. Impregnation reduced the specific surface area, but did not significantly affected the acidity (Brønsted and Lewis) of the zeolites. The catalytic evaluation was carried out in a fixed bed flow reactor using air as the carrier and injecting glycerol by means of a syringe pump. Acrolein was the main product, with acetaldehyde and hydroxy-acetone (acetol) being also formed. Acrylic acid was formed with approximately 25% selectivity at 548 K over the impregnated zeolites. The result can be explained by XPS (X-ray photoelectron spectroscopy) measurements, which indicated a good dispersion of the vanadium inside the pores.Keywords: glycerol, acrylic acid, zeolite, dehydration, oxidation IntroductionGlycerol is usually found in combination with fatty acids of natural occurrence forming the triglycerides. Today, the major source of glycerol is the transesterification of oils and fats to produce biodiesel. 1 In this reaction, a molecule of triglyceride reacts with three molecules of methanol, under base catalysis conditions, to afford three molecules of fatty acid methyl esters (the biodiesel) and a molecule of glycerol (Scheme 1). In recent years, the growing concern about global warming has motivated the use of biofuels. Biodiesel, together with bioethanol, is one of the most important biofuels used nowadays.For each 90 m 3 of biodiesel produced by transesterification, about 10 m 3 of glycerol are obtained. The worldwide glycerol production will reached 2 approximately 1.2 million tons in 2012 and most of this production will come from the biodiesel industry. In Brazil, for instance, there is a mandatory blend of 5% of biodiesel in the petrodiesel, which represents an annual glycerol production of approximately 300,000 tons. The traditional markets for glycerol are cosmetics, soaps, pharmaceuticals and personal care products. However, with the increasing ...

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“…Various solid acid catalysts, viz. metal phosphates, 8,9,[13][14][15][16] metal sulfates, 17 metal oxides, [17][18][19] supported heteropolyacids (HPAs) 17,[20][21][22][23][24][25][26] and zeolites, 11,17,27,[28][29][30][31][32] have been reported. HPAs with well defined Keggin structures are well-known solid acid catalysts.…”

Section: Introductionmentioning

confidence: 99%

Gas-phase Dehydration of Glycerol over Supported Silicotungstic Acids Catalysts

Kim¹,

Jung²,

Park³

2010

Bulletin of the Korean Chemical Society

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The gas-phase dehydration of glycerol to acrolein was carried out over 10 wt % HSiW catalysts supported on different supports, viz. γ-Al2O3, SiO2-Al2O3, TiO2, ZrO2, SiO2, AC, CeO2 and MgO. The same reaction was also conducted over each support without HSiW for comparison. Several characterization techniques, N2-physisorption, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), the temperature-programmed desorption of ammonia (NH3-TPD), temperature-programmed oxidation (TPO) with mass spectroscopy and CHNS analysis were employed to characterize the catalysts. The glycerol conversion generally increased with increasing amount of acid sites. Ceria showed the highest 1-hydroxyacetone selectivity at 315 o C among the various metal oxides. The supported HSiW catalyst showed superior catalytic activity to that of the corresponding support. Among the supported HSiW catalysts, HSiW/ZrO2 and HSiW/SiO2-Al2O3 showed the highest acrolein selectivity. In the case of HSiW/ZrO2, the initial catalytic activity was recovered after the removal of the accumulated carbon species at 550 o C in the presence of oxygen.

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Conversion of Glycerol to Acrolein in the Presence of WO3/ZrO2 Catalysts

Cited by 124 publications

References 8 publications

Efficient production of propylene in the catalytic conversion of glycerol

Efficient production of propylene in the catalytic conversion of glycerol

Oxidative dehydration of glycerol to acrylic acid over vanadium-impregnated zeolite beta

Gas-phase Dehydration of Glycerol over Supported Silicotungstic Acids Catalysts

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