1,3-Butadiene Hydrogenation in 1-Butene Over Alumina Supported Pd-Ag Catalysts

Hightower, Joe W.; Furlong, B.; Sárkány, A.; Guczi, L.

doi:10.1016/s0167-2991(08)64286-x

Cited by 17 publications

(7 citation statements)

References 4 publications

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“…1 The selective catalytic hydrogenation of alkynes and dienes in the presence of alkenes is the most appropriate method to lower their concentration level, as it consists of the conversion of the impurities into valuable alkene products. Among the various metal catalysts used for the selective hydrogenation of alkynes or dienes, palladium is considered as the most effective, 2,3 especially when it is associated with another metal such as Ag [4][5][6][7][8] or when it is partially poisoned by the addition of lead (Lindlar's catalysts). [9][10][11][12] More recently, gold-based catalysts have received some attention for selective hydrogenation reactions as reported in several reviews.…”

Section: Introductionmentioning

confidence: 99%

Selective hydrogenation of butadiene over TiO₂supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Delannoy¹,

Thrimurthulu²,

Reddy³

et al. 2014

Phys. Chem. Chem. Phys.

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Oxide supported copper and gold catalysts are active for the selective hydrogenation of polyunsaturated hydrocarbons but their low activity compared to palladium catalysts and the deactivation of copper catalysts limit their use. There are only a very limited number of studies concerned with the use of bimetallic Au-Cu catalysts for selective hydrogenation reactions and the aim of this work was to prepare TiO2-supported monometallic Au and Cu and bimetallic AuCu (Cu/Au atomic ratio of 1 and 3) catalysts and to evaluate their catalytic performance in the selective hydrogenation of butadiene. Small gold, copper and gold-copper nanoparticles (average particle size < 2 nm) were obtained on TiO2 using the preparation method of deposition-precipitation with urea followed by reduction under H2 at 300 °C. Very small clusters were observed for Cu/TiO2 (∼1 nm) which might result from O2 induced copper redispersion, as also supported by the XPS analyses. The alloying of copper with gold was found to inhibit its redispersion and also limits its reoxidation, as attested by XPS. The bimetallic character of the AuCu nanoparticles was confirmed by XPS and EDX-HAADF. Cu/TiO2 was initially more active than Au/TiO2 in the selective hydrogenation of butadiene at 75 °C but it deactivated rapidly during the first hours of reaction whereas the gold catalyst was very stable up to 20 hours of reaction. The bimetallic AuCu/TiO2 catalysts displayed an activation period during the first hours of the reaction, which was very pronounced for the sample containing a higher Cu/Au atomic ratio. This initial gain in activity was tentatively assigned to copper segregation at the surface of the bimetallic nanoparticles, induced by the reactants. When the AuCu/TiO2 catalysts were pre-exposed to air at 75 °C before butadiene hydrogenation, surface copper segregation occurred, leading to higher initial activity and the suppression of the activation period. Under the same conditions, Cu/TiO2 totally lost its activity, probably due to irreversible copper oxidation.

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Section: Introductionmentioning

confidence: 99%

Selective hydrogenation of butadiene over TiO₂supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Delannoy¹,

Thrimurthulu²,

Reddy³

et al. 2014

Phys. Chem. Chem. Phys.

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“…In manufacturing polymers, the catalytic hydrogenation of dienes is widely used for the purification of olefin stream. The hydrogenation catalysts commonly utilize supported precious metals, such as Pd- [1][2][3], Pt- [4][5][6], Rh- [7] or Au- [8,9] based catalysts. The precious metal catalysts have shown high activity; however, their high cost and limited abundance are potential concerns for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Replacing Precious Metals with Carbide Catalysts for Hydrogenation Reactions

et al. 2015

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Molybdenum carbide (Mo 2 C and Ni/Mo 2 C) catalysts were compared with Pd/SiO 2 for the hydrogenation of several diene molecules, 1,3-butadiene, 1,3and 1,4-cyclohexadiene (CHD). Compared to Pd/SiO 2 , Mo 2 C showed similar hydrogenation rate for 1,3-butadiene and 1,3-CHD and even higher rate for 1,4-CHD, but with significant deactivation rate for 1,3-CHD hydrogenation. However, the hydrogenation activity of Mo 2 C could be completely regenerated by H 2 treatment at 723 K for the three molecules. The Ni modified Mo 2 C catalysts retained similar activity for 1,3-butadiene hydrogenation with significantly enhanced selectivity for 1-butene production. The 1-butene selectivity increased with increasing Ni loading below 15%. Among the Ni modified Mo 2 C catalysts, 8.6%Ni/Mo 2 C showed the highest selectivity to 1-butene, which was even higher selectivity than that over Pd/SiO 2 . Compared to Pd/SiO 2 , both Mo 2 C and Ni/Mo 2 C showed combined advantages in hydrogenation activity and catalyst cost reduction, demonstrating the potential to use less expensive carbide catalysts to replace precious metals for hydrogenation reactions.

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“…In recent years considerable progress has been achieved in minimizing the undesired side reactions and thus improving the selectivity. The development was based mainly on employing bimetallic catalysts, like Pd-Ag (Hightower et al, 1993;Miura et al, 1993), Pd-Au (Miura et al, 1993), Pd-Cr (Borgna et al, 1991), Pd-Cu (Furlong et al, 1994), Pd-Pb (Goetz et al, 1995;Adu ´riz et al, 1992), and Pd-Zn (Sarkany et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Kinetic Aspects of Selectivity and Stereoselectivity for the Hydrogenation of Buta-1,3-diene over a Palladium Catalyst

Goetz

Murzin

Touroude

1996

Ind. Eng. Chem. Res.

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The gas-phase hydrogenation of buta-1,3-diene to but-1-ene, trans- and cis-but-2-ene, and butane over Pd catalysts was studied. The reaction was investigated in a reactor operating at atmospheric pressure at 0−20 °C over a wide range of conversions. Special attention was focused on the selectivity as a function of conversion. Up to high conversions (low values of buta-1,3-diene mole fractions) selectivity and stereoselectivity toward reaction products were constant. At approximately 85% conversion the selectivity in but-1-ene was seen to decrease. The selectivity and stereoselectivity were described within a framework of the advanced reaction mechanism. Deactivation influenced the activity and selectivity of the reaction. Deactivation kinetics was taken into account, assuming the formation of higher molecular weight oligomerized olefins. The parameters of the kinetic model were estimated with nonlinear regression analysis. Simulations showed that the kinetic model is able to describe selectivity and stereoselectivity behavior in buta-1,3-diene hydrogenation over the whole range of conversions.

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1,3-Butadiene Hydrogenation in 1-Butene Over Alumina Supported Pd-Ag Catalysts

Cited by 17 publications

References 4 publications

Selective hydrogenation of butadiene over TiO₂supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Selective hydrogenation of butadiene over TiO₂supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Replacing Precious Metals with Carbide Catalysts for Hydrogenation Reactions

Kinetic Aspects of Selectivity and Stereoselectivity for the Hydrogenation of Buta-1,3-diene over a Palladium Catalyst

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1,3-Butadiene Hydrogenation in 1-Butene Over Alumina Supported Pd-Ag Catalysts

Cited by 17 publications

References 4 publications

Selective hydrogenation of butadiene over TiO2supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Selective hydrogenation of butadiene over TiO2supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Replacing Precious Metals with Carbide Catalysts for Hydrogenation Reactions

Kinetic Aspects of Selectivity and Stereoselectivity for the Hydrogenation of Buta-1,3-diene over a Palladium Catalyst

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Selective hydrogenation of butadiene over TiO₂supported copper, gold and gold–copper catalysts prepared by deposition–precipitation

Selective hydrogenation of butadiene over TiO₂supported copper, gold and gold–copper catalysts prepared by deposition–precipitation