Analysis of the performance of single capillary and multiple capillary (monolith) reactors for the multiphase Pd-catalyzed hydrogenation of 2-Butyne-1,4-Diol

Natividad, Reyna; Kulkarni, Ranjit; Nuithitikul, Kamchai; Raymahasay, S.; Wood, Joseph; Winterbottom, J. M.

doi:10.1016/j.ces.2004.09.011

Cited by 28 publications

(19 citation statements)

References 15 publications

(16 reference statements)

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“…First, the support is deposited on the monolith by washcoating using a slurry of the support material with or without a binder. In the second step, the active metal is impregnated on the washcoated support (Kreutzer et al, 2001;Boger et al, 2004;Naitividad et al, 2004;Zhao et al, 2008). In multiphase reactions, the reactor performance is a combined effect of both internal and external mass transfer resistances.…”

Section: Introductionmentioning

confidence: 99%

Effect of method of preparation on activity of Pd/Al₂O₃ monolith catalysts

Mogalicherla

Kunzru

2010

Can J Chem Eng

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monolithic catalyst of different washcoat thicknesses were prepared by two methods and tested for the activity of hydrogenation of˛-methyl styrene. These catalysts were prepared by two methods; either the palladium was impregnated on -alumina and this Pd/Al 2 O 3 powder was used to prepare the slurry for washcoating (Cat 1) or -alumina washcoating was followed by impregnation of palladium (Cat 2). The effect of slurry concentration, pH of the slurry, and addition of binders on the catalyst properties was investigated. The monolithic catalysts were characterised by determination of metal dispersion, surface area, scanning electron microscopy, and weight loss of washcoat during ultrasonication. Well-adhered washcoats were obtained with slurry prepared using milled -alumina, whereas the adhesion of the washcoat prepared using Pd/Al 2 O 3 powders was very poor. Addition of binders significantly improved the adhesion of the washcoats prepared from Pd/Al 2 O 3 . Metal dispersion for Cat 2 decreased with washcoat loading but did not change with loading for Cat 1. The activity tests were conducted at different washcoat loadings and the productivity of the monolithic catalyst prepared in both methods has been compared. Des catalyseurs monolithiques de Pd/Al2O3 et d'épaisseurs de couche lavis différentes ontété préparées par deux méthodes et testées en termes d'activité pour l'hydrogénation du˛-méthyl-styrène. Ces catalyseurs ontété préparés par deux méthodes : 1) du palladium aété enduit sur de la -alumine et cette poudre de Pd/Al2O3était utilisée pour préparer la boue de couche lavis (Cat 1) ou 2) la préparation de la couche lavis de y-alumineétait suivie d'un enduit de palladium (Cat 2). On aétudié l'effet de la concentration de la boue, de son pH et de l'ajout de liants sur les propriétés des catalyseurs. On a déterminé les caractéristiques des catalyseurs monolithiques par détermination de la dispersion métallique, de la surface, par une microscopieélectroniqueà balayage et par la perte de poids de la couche lavis durant l'ultrasonication. Des couches lavis de bonne adhésion ontété obtenues avec des boues préparées en utilisant de la -alumine moulue, tandis que l'adhésion des couches lavis préparées avec des poudres de Pd/Al2O3était très mauvaise. L'ajout de liants améliorait de façon significative l'adhésion des couches lavis préparées avec le Pd/Al2O3. La dispersion métallique du Cat 2 diminuait avec la charge de couche lavis mais pour le Cat 1, cette dispersion n'était pas modifiée avec la charge. Ces tests d'activité ontété effectués pour différentes charges de couche lavis et l'on a comparé la productivité des catalyseurs monolithiques produits par les deux méthodes.

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Section: Introductionmentioning

confidence: 99%

Effect of method of preparation on activity of Pd/Al₂O₃ monolith catalysts

Mogalicherla

Kunzru

2010

Can J Chem Eng

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“…Scheme 1: 2-Butyne-1,4-diol hydrogenation scheme [29]. low cost and environmentally friendly since the support is a waste material, the solvent is water, and the calcination step is eliminated.…”

Section: Discussionmentioning

confidence: 99%

“…The withdrawn liquid samples were analyzed by gas chromatography with a flame ionization detector using a VARIAN CP3800 GC (DB-WAX 52 column, length 32 m, inner diameter = 0.3 mm) and helium (30 ml/min) as carrier gas, according to previous reported analysis methods [29,31,32]. Reaction samples were injected into the GC and analyzed under the following conditions: temperature detector was set at 518 K, injector temperature was set at 513 K, initial oven temperature was 353 K, and this was raised up to 493 K at a rate 10 (K/min).…”

Section: Hydrogenation Of 2-butyne-14-diolmentioning

confidence: 99%

Synthesis, Characterization, and Catalytic Activity of Platinum Nanoparticles on Bovine-Bone Powder: A Novel Support

Gama-Lara

Morales‐Luckie

Argueta-Figueroa

et al. 2018

Journal of Nanomaterials

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Pt nanoparticles supported on bovine-bone powder were obtained by a rather simple method consisting of immersing powder of bovine bone into a Pt +4 metal ion solution at room temperature and subsequent reduction by sodium borohydride. This method eliminates the calcination step of the usual catalyst preparation methods. The nanocomposite was characterized by transmission electron microscopy (TEM), which revealed uniformly dispersed platinum nanoparticles with average particle size of 2.2 nm ± 0.6 nm. The XPS studies exhibited the presence of 63% Pt ∘ and 37% PtO. The catalytic activity was tested in the hydrogenation of 2-butyne-1,4-diol. The nanocomposite shows good catalytic performance with nearly 100% conversion and 83% selectivity towards 2-butene-1,4-diol.

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“…7 They considered that, compared with other flow patterns, Taylor flow was the optimum with the reaction rate dependent on the liquid slug length. 7 Natividad et al 18 and Tsoligkas et al 19 studied the hydrogenation of 2-butyne-1,4-diol on Pd catalyst under Taylor flow in monolith and capillary reactors. Their experiments showed that the operating condition of Taylor flow influenced remarkably the initial reaction rate.…”

mentioning

confidence: 99%

“…Their experiments showed that the operating condition of Taylor flow influenced remarkably the initial reaction rate. 18,19 It was well known that, compared with circular channels, square channel monolith reactors were more widely used in practice. The flow states of reactants in square channels were remarkably different from that in circular channels.…”

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confidence: 99%

Hydrogenation of 2‐ethylanthraquinone under Taylor flow in single square channel monolith reactors

Zhang

Kong

et al. 2009

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).The hydrogenation of 2-ethylanthraquinone (EAQ) to 2-ethylanthrahydroquinone (EAHQ) was carried out under Taylor flow in single square channel monolith reactors. The two opening ends of opaque reaction channel were connected with two circular transparent quartz-glass capillaries, where Taylor flow hydrodynamics parameters were measured and further used to obtain practical flow state of reactants in square reaction channels. A carefully designed gas-liquid inlet mixer was used to supply steady gas bubbles and liquid slugs with desired length. The effects of various operating parameters, involving superficial gas velocity, superficial liquid velocity, gas bubble length, liquid slug length, two-phase velocity and temperature, on EAQ conversion were systematically researched. Based on EAQ conversion, experimental overall volumetric mass transfer coefficients were calculated, and also studied as functions of various parameters as mentioned earlier. The film model, penetration model, and existing semi-empirical formula were used to predict gas-solid, gas-liquid, and liquid-solid volumetric mass transfer coefficients in Taylor flow, respectively. The predicted overall volumetric mass transfer coefficients agreed well with the experimental ones.

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Analysis of the performance of single capillary and multiple capillary (monolith) reactors for the multiphase Pd-catalyzed hydrogenation of 2-Butyne-1,4-Diol

Cited by 28 publications

References 15 publications

Effect of method of preparation on activity of Pd/Al₂O₃ monolith catalysts

Effect of method of preparation on activity of Pd/Al₂O₃ monolith catalysts

Synthesis, Characterization, and Catalytic Activity of Platinum Nanoparticles on Bovine-Bone Powder: A Novel Support

Hydrogenation of 2‐ethylanthraquinone under Taylor flow in single square channel monolith reactors

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Analysis of the performance of single capillary and multiple capillary (monolith) reactors for the multiphase Pd-catalyzed hydrogenation of 2-Butyne-1,4-Diol

Cited by 28 publications

References 15 publications

Effect of method of preparation on activity of Pd/Al2O3 monolith catalysts

Effect of method of preparation on activity of Pd/Al2O3 monolith catalysts

Synthesis, Characterization, and Catalytic Activity of Platinum Nanoparticles on Bovine-Bone Powder: A Novel Support

Hydrogenation of 2‐ethylanthraquinone under Taylor flow in single square channel monolith reactors

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Effect of method of preparation on activity of Pd/Al₂O₃ monolith catalysts

Effect of method of preparation on activity of Pd/Al₂O₃ monolith catalysts