Gas-phase dehydration of glycerol to acrolein catalysed by caesium heteropoly salt

Alhanash, Abdullah M.; Kozhevnikova, Elena F.; Kozhevnikov, Ivan V.

doi:10.1016/j.apcata.2010.01.043

Cited by 306 publications

(263 citation statements)

References 25 publications

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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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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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“…In fact, while the zirconia-grafted catalyst exhibited outstanding long-term performance, it requires an activation period of about 1 h. In the beginning (0-1 h), the zirconia-grafted catalyst exhibits a poor selectivity to acrolein of no more than 38 %, against 79 % for the catalyst based on bare silica. This type of activation period is well reported for Lewis acid catalysts in the dehydration of glycerol 90) . In fact, Lewis acid sites present on the fraction of zirconia that is not covered by STA first catalyze the selective formation of acetol.…”

Section: (A) Glycerol Conversion To Acroleinmentioning

confidence: 77%

Biomass-derived Platform Molecules Upgrading through Catalytic Processes: Yielding Chemicals and Fuels

Dumeignil

Capron

Katryniok

et al. 2015

J. Jpn. Petrol. Inst.

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Biomass valorization is a booming field. Especially, the valorization of platform molecules by catalytic processes has driven a large interest in the recent years, and many groups are actively working on the transformation of biosourced substrates to a variety of upgraded chemicals. In this context, in the present paper we put in perspectives the scientific works of our research team. We first classified catalytic transformations of industrial interest according to the number of carbons of the starting material, from C1 to C6. They involve, among others, acid catalysts (e.g., for glycerol dehydration), redox catalysts (e.g., for 5-HMF conversion to diformylfuran), acid and redox catalysts (e.g., for direct acetalization of alcohols), or complex multifunctional catalysts, especially for the Guerbet reaction. Further, we also developed what we called 'toolboxes,' which are general concepts or technologies with a broader field of applications. For example, we adapted the two zones fluidized bed reactor (TZFBR) concept to the single reactor continuous regeneration of coking catalysts. Further, we designed a completely new high throughput platform enabling synthetizing, characterizing and testing the performances of many catalysts for considerably accelerating the catalysts discovery/optimization loop.

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“…The properties of the catalyst were closely related to silicotungstic acid dispersion and the relative quantities of strong acid sites [5]. Cesium 12-tungstophosphate, also possessing strong Brønsted acid sites, is an active catalyst for the dehydration of glycerol to acrolein in the gas-phase process under 1 bar pressure at 275 °C [6]. Nanocrystalline HZSM-5 catalysts with high Si/Al molar ratio (ca.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Acrolein from Glycerol Using FePO4 Catalyst in Liquid Phase Dehydration

Abidin

Afandi

Graha

2016

J. Eng. Technol. Sci.

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Abstract. Acrolein is currently produced using propylene from crude oil while its price and scarcity are increasing. A renewable material such as glycerol is an attractive alternative for acrolein production. It can be obtained from crude palm oil (CPO) and is a byproduct of biodiesel production. Besides being able to compete economically, glycerol is an environmentally friendly material. The purpose of this study is to synthesize acrolein from glycerol using FePO 4 catalyst in liquid phase dehydration. The catalyst was prepared by three different methods: hydrothermal (catalyst A), deposition at Fe/P = 1.15 (catalyst B), and deposition at Fe/P = 1.20 (catalyst C). The experimental reaction temperature was varied at 220, 240 and 260 °C under constant atmospheric pressure. The results showed that catalyst C provided the best yield (91%), followed by catalyst A (90%) and catalyst B (82%). The increasing reaction temperature showed a tendency to increase the yield of acrolein, while the presence of oxygen reduced the yield of acrolein and allowed the reaction to produce more side products such as glycerol propanal, acetaldehyde, and propionate. Catalyst reuse without any regeneration resulted in a yield profile of acrolein that continued to decline.

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Gas-phase dehydration of glycerol to acrolein catalysed by caesium heteropoly salt

Cited by 306 publications

References 25 publications

Gas-phase Dehydration of Glycerol over Supported Silicotungstic Acids Catalysts

Gas-phase Dehydration of Glycerol over Supported Silicotungstic Acids Catalysts

Biomass-derived Platform Molecules Upgrading through Catalytic Processes: Yielding Chemicals and Fuels

Synthesis of Acrolein from Glycerol Using FePO4 Catalyst in Liquid Phase Dehydration

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