New composite materials as support for selective hydrogenation; egg-shell catalysts

Badano, Juan; Betti, Carolina; Rintoul, Ignacio; Vich-Berlanga, J.; Cagnola, Edgardo; Torres, Gerardo; Vera, Carlos Román; Yori, Juan Carlos; Quiroga, Mónica

doi:10.1016/j.apcata.2010.10.008

Cited by 27 publications

(29 citation statements)

References 20 publications

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“…We have also reported that when Pd is supported over composite organic-inorganic supports, the resulting catalysts prove to be highly active for the selective hydrogenation of styrene [9]. These catalysts were also found to be more mechanically resistant than other commercial supports thus being attractive for being used in long packed bed columns of continuous processes [10].…”

Section: Introductionmentioning

confidence: 99%

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Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Betti

Badano

Lederhos

et al. 2015

Reac Kinet Mech Cat

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This is a study on the kinetics of the liquid-phase hydrogenation of styrene to ethylbenzene over a catalyst of palladium supported on an inorganic-organic composite. This support has a better mechanical resistance than other commercial supports, e.g. alumina, and yields catalysts with egg-shell structure and a very thin active Pd layer. Catalytic tests were carried out in a batch reactor by varying temperature, total pressure and styrene initial concentration between 353-393 K, 10-30 bar, and 0.26-0.60 mol L -1 , respectively. Kinetic models were developed on the assumptions of dissociative hydrogen chemisorption and non-negligible adsorption of hydrogen and styrene. Final chemical reaction expressions useful for reactor design were obtained. The models that best fitted the experimental data were those ones that considered the surface reaction as the limiting step. In this sense a two-step Horiuti-Polanyi working mechanism with half hydrogenation intermediates gave the best fit of the experimental data. The heats of adsorption of styrene and ethylbenzene were also estimated.

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Section: Introductionmentioning

confidence: 99%

“…The composite support (BTAl) was prepared following a technique developed by our group [9,10]. The method basically comprises the copolymerization of two monomers (1:1 molar ratio).…”

Section: Catalyst Preparationmentioning

confidence: 99%

Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Betti

Badano

Lederhos

et al. 2015

Reac Kinet Mech Cat

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“…In HPLC, recently developed core-shell particles (smaller than 3 mm) [25,34] indeed make the competition for monoliths very hard. In catalysis, it reflects the so-called egg-shell particles [41,47]. They are useful when the reaction is very fast and intraparticle mass and heat transfer limitations impact the activity, selectivity, and lifetime of the catalyst.…”

Section: Examples Of Monoliths In Separation and Catalysismentioning

confidence: 99%

Sol‐Gel and Porous Glass‐Based Silica Monoliths with Hierarchical Pore Structure for Solid‐Liquid Catalysis

Enke

Gläser

Tallarek

2016

Chemie Ingenieur Technik

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This work draws attention to both prospects and challenges for silica monoliths in solid-liquid catalysis at ultrahigh efficiency. The fundamental advantages of silica monoliths as support structure over particulate fixed beds and organicpolymer monoliths are illustrated as well as recent applications as flow-through microreactors for the production of fine chemicals. Preparation routes to sol-gel and porous glass-based silica monoliths featuring a hierarchical pore structure are described and their potential use as short-contact-time reactors is highlighted together with a view on the multiscale characterization and their rational design by establishing quantitative synthesis-morphology-transport relationships.

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“…Bad wettability and non-homogeneity of the natural fillers utilized in the polymeric composites belong among the main disadvantages of their use [20]. The conclusions of various authors were certified that adding the filler into the reactoplastics epoxy-based matrix affected the mechanical properties of the resultant composite [4-6; 22; 23].…”

Section: Resultsmentioning

confidence: 99%

“…Many studies proved their positive influence [1] as an ingredient in various products. It has been demonstrated that using lowcost materials and a relatively simple process complex supports with a mixed inorganic-organic structure can be synthesized [3]. The recent research has been focused on development of biological composites where a matrix or a reinforcement is of a biological essence [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Polymeric particle composites based on filler from hen egg-shells

Petrásek

Müller

2017

Engineering for Rural Development

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Abstract. The paper deals with utilization of a by-product from the food industry, namely waste coming into being at processing hen eggs, i.e. egg-shells. Polymeric particle composites, i.e. structural two-component epoxy resins CHS EPOXY 324 Lepox 1200 filled with microparticles from hen egg-shells of 10, 20, 30 and 40 wt. % concentrations, were used within the research. The aim of the research was to evaluate the possibilities of the use of the microparticles based on hen egg-shells as the filler in the structural two-component resin. Another aim was to determine the influence of the filler content in the structure of the composite material on the mechanical properties, i.e. the tensile strength, elongation at break and hardness. The tensile strength was increased of 22 % at 10 wt. % egg-shell microparticle filler. The elongation at break was decreased with increasing the filler weight up of 34.5 %. The influence of the filler on the hardness was not statistically proved, however, the filler proved good wettability with the matrix. A scanning electron microscopy MIRA 3 TESCAN (SEM) was used for the description of the created composite material. The research was based on an assumption of an optimization of the waste utilization from renewable resources with the aim to gain a material providing good mechanical properties. The egg-shell microparticle filler proved the effectivity in the area of filling two-component epoxy resin also at high concentrations, i.e. to 40 wt. %.Keywords: composite, egg-shell microparticles, elongation at break, hardness, tensile strength. IntroductionThe paper deals with utilization of a by-product from the food industry, namely waste coming into being at processing hen eggs. The production of hen eggs on an industrial level leads to an essential amount of shells, which are regarded as waste or they are used as a supplement in agriculture. Generally, it can be said that the egg-shells are of no economic value [1]. However, they are rich in minerals. This material can be regarded [2] as a source of the calcium filler. Many studies proved their positive influence [1] as an ingredient in various products. It has been demonstrated that using lowcost materials and a relatively simple process complex supports with a mixed inorganic-organic structure can be synthesized [3]. The recent research has been focused on development of biological composites where a matrix or a reinforcement is of a biological essence [4][5][6][7]. At present composites containing the biological reinforcement based on waste, i.e. the by-product from the manufacturing industry, [4] have been developed. A natural based material can be defined as a product made from renewable agricultural and forestry feedstock, including crops and crop by-products and their residues [8]. Biocomposites are also made with the use of various other ingredients, e.g., feather, cellulose fibres, coconut, flax, sisal, Ensete ventricosum, seeds of Phoenix, rice -husk, jute etc [1; 5; 6; 9-14] .About several hundred thousand tons of egg-shell ...

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New composite materials as support for selective hydrogenation; egg-shell catalysts

Cited by 27 publications

References 20 publications

Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Sol‐Gel and Porous Glass‐Based Silica Monoliths with Hierarchical Pore Structure for Solid‐Liquid Catalysis

Polymeric particle composites based on filler from hen egg-shells

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