New efficient and long-life catalyst for gas-phase glycerol dehydration to acrolein

Lauriol-Garbey, P.; Millet, J.M.M.; Loridant, S.; Bellière-Baca, V.; Rey, Patrick

doi:10.1016/j.jcat.2011.05.014

Cited by 40 publications

(37 citation statements)

References 36 publications

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“…One approach to substitute propylene relies on the use of new raw materials. For instance, catalysts and processes have been developed for the direct conversion of glycerol to acrolein [79]. However, in such processes catalysts face two major difficulties: (i) there is a more or less rapid deactivation; (ii) their selectivity is capped at an upper limit of less than 80%.…”

Section: Biomass Transformation Reactionsmentioning

confidence: 99%

Heterogeneous Catalysis on Metal Oxides

2017

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This review article contains a reminder of the fundamentals of heterogeneous catalysis and a description of the main domains of heterogeneous catalysis and main families of metal oxide catalysts, which cover acid-base reactions, selective partial oxidation reactions, total oxidation reactions, depollution, biomass conversion, green chemistry and photocatalysis. Metal oxide catalysts are essential components in most refining and petrochemical processes. These catalysts are also critical to improving environmental quality. This paper attempts to review the major current industrial applications of supported and unsupported metal oxide catalysts. Viewpoints for understanding the catalysts' action are given, while applications and several case studies from academia and industry are given. Emphases are on catalyst description from synthesis to reaction conditions, on main industrial applications in the different domains and on views for the future, mainly regulated by environmental issues. Following a review of the major types of metal oxide catalysts and the processes that use these catalysts, this paper considers current and prospective major applications, where recent advances in the science of metal oxide catalysts have major economic and environmental impacts.

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Section: Biomass Transformation Reactionsmentioning

confidence: 99%

Heterogeneous Catalysis on Metal Oxides

2017

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“…27,28 Consequently, undesirable dehydration reactions and problems associated with coke deposition are suppressed in the case of Brønsted acid sites compared to Lewis acid sites. 29 Thus, although the total amount and the strength of the acid sites decrease after a small amount of Pd is added, a significant increase in Brønsted acid characteristics would be beneficial for the selective dehydration of glycerol.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Promoter effect of Pd in CuCr2O4 catalysts on the hydrogenolysis of glycerol to 1,2-propanediol

Kim

Park

et al. 2012

Green Chem.

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CuCr 2 O 4 catalysts containing various amounts of Pd (Pd-CuCr) were prepared by a co-precipitation method and examined for use in the conversion of glycerol to 1,2-propanediol (1,2-PDO). Pd was observed to be highly dispersed in a CuCr 2 O 4 spinel structure and conferred unique reduction characteristics of a CuCr 2 O 4 catalyst. After reduction, the amounts of surface exposed Cu 0 species and occluded hydrogen species were much larger in the case of added Pd, the Pd-CuCr catalyst, compared to a pure copper chromite catalyst. The Pd-CuCr catalyst utilized hydrogen very efficiently, resulting in an enhancement in the catalytic activity for the conversion of glycerol to 1,2-PDO, even at a relatively low hydrogen pressure. The Pd 0.5 -CuCr catalyst (containing 0.5 wt% of Pd) showed a total yield of 93.9%, with a selectivity approaching 100% for 1,2-PDO at a hydrogen pressure of 4 MPa. In a kinetic study, the effects of H 2 pressure and the concentration of glycerol on the initial rate were examined. Based on the results, the palladium promoter (Pd-CuCr) enhanced the rate constant by about 1.7 times compared with copper chromite. The results provide a basis for the production of 1,2-PDO from glycerol using a process which is both environmentally benign and has improved economics.

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“…However, in both aforementioned works, the niobia catalysts showed glycerol conversions decreased rapidly with TOS. Lauriol-Garbey et al 19,20 used zirconium and niobium mixed oxides (ZrNbO) as catalysts for glycerol dehydration. The ZrNbO catalysts gave the recorded high conversion of 82% even aer 177 h on stream with acrolein selectivity remaining 72%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nb doping in WO₃/ZrO₂ catalysts on gas phase dehydration of glycerol to form acrolein

Sung

Cheng

2017

RSC Adv.

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Gas-phase dehydration of glycerol to produce acrolein was investigated over tungstated zirconia catalysts with and without niobium doping, in order to correlate the catalytic activity and life-stability with the acid/ base properties of the catalysts. The results of NH 3 -and CO 2 -TPD experiments showed that the tungstated zirconia catalysts contained both acidic and basic sites, and the amounts decreased with the increase in calcination temperature. The most suitable calcination temperature for 20% WO 3 /ZrO 2 as the catalyst in the gas phase dehydration of glycerol to form acrolein was 450 C in consideration of achieving high acrolein yield and long lifetime of the catalyst. Not only the amount of acid but also the amount of base affected the acrolein yield. Doping a small amount of niobium further increased the life-stability of the catalysts, attributed to the decrease in the number of basic sites. The influence of Nb is mostly in neutralization of surface acidity electronically instead of geometric blocking of the basic sites. Moreover, fine tuning the ratio of acid/base sites was found to be important in achieving good catalytic performance in the gas-phase dehydration of glycerol to generate acrolein. The ratio of acid/base sites in the range of 4-5.4 gave the highest glycerol conversion, and acrolein yield and lowest catalyst decay rate. The spent catalysts were easily regenerated by calcination at 450 C, and the catalytic activities were retained well even after the second time of reuse.

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New efficient and long-life catalyst for gas-phase glycerol dehydration to acrolein

Abstract: RAFFINAGE+SL

Cited by 40 publications

References 36 publications

Heterogeneous Catalysis on Metal Oxides

Heterogeneous Catalysis on Metal Oxides

Promoter effect of Pd in CuCr2O4 catalysts on the hydrogenolysis of glycerol to 1,2-propanediol

Effect of Nb doping in WO₃/ZrO₂ catalysts on gas phase dehydration of glycerol to form acrolein

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New efficient and long-life catalyst for gas-phase glycerol dehydration to acrolein

Abstract: RAFFINAGE+SL

Cited by 40 publications

References 36 publications

Heterogeneous Catalysis on Metal Oxides

Heterogeneous Catalysis on Metal Oxides

Promoter effect of Pd in CuCr2O4 catalysts on the hydrogenolysis of glycerol to 1,2-propanediol

Effect of Nb doping in WO3/ZrO2 catalysts on gas phase dehydration of glycerol to form acrolein

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Effect of Nb doping in WO₃/ZrO₂ catalysts on gas phase dehydration of glycerol to form acrolein