Drying of supported catalysts for high metal concentrations: A reduced parameter model

Noorithaya, Anusha V.; Bishop, Cody; Sarkar, Prateek; Khinast, Johannes G.; Glasser, Benjamin J.

doi:10.1016/j.ces.2019.05.014

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…This step is followed by drying and calcination to remove the solvent and convert the deposited NPs into the active state. Since a wide range of metal combinations, whose interaction with the support can largely vary, is used in the present research, slow drying is preferable to obtain homogeneous distribution 31,32 .…”

Section: Introductionmentioning

confidence: 99%

High-throughput screening of multimetallic catalysts for three-way catalysis

Ton

Seenivasan

et al. 2023

Preprint

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Multimetallic nanoparticles (MNPs) have appeared as promising catalysts for important catalytic reactions such as three-way catalysis (TWC) due to their synergistic effects. Herein, a comprehensive process of preparing and evaluating MNPs and supported catalysts using high-throughput experimentation (HTE) for TWC is demonstrated. The synthesis of MNPs via a hot-injection method is performed using a homemade parallel reactor. The prepared MNPs are impregnated in parallel on alumina and examined for TWC. An in-house fixed-bed reactor equipped with a quadrupole mass spectrometer was employed for catalyst evaluation, taking advantage of the rapid screening of 20 catalysts and multiple reaction conditions. The overall HTE system can facilitate the synthesis and evaluation of 51 multimetallic catalysts for TWC in less than 2 weeks, and also appear to be a flexible and versatile system for other applications

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Section: Introductionmentioning

confidence: 99%

High-throughput screening of multimetallic catalysts for three-way catalysis

Ton

Seenivasan

et al. 2023

Preprint

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“…Originally developed and verified against macroporous materials, i.e., soil or wood, the volume averaged formulation has also been successfully applied for the prediction of postdrying catalyst profiles in micro- and mesoporous materials. ,, In all those cases, the transport is highly dependent on averaged properties of the porous media, e.g., saturation, permeability, and capillary pressure to name a few. Often, those are determined experimentally for a support, yet research into analytical derivations of those parameters from routinely measured bulk properties is quite active. − Those models often rely on dedicated configurations of the pore size distributions and therefore allow the derivation of the relevant parameters from the porosity and the knowledge of minimum and maximum pore size.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Drying Process of Porous Catalysts: Impact of the Pore Size Distribution

Rieder,

Peters,

Kuipers

2023

Ind. Eng. Chem. Res.

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The distribution of catalytically active species in heterogeneous porous catalysts strongly influences their performance and durability in industrial reactors. A drying model for investigating this redistribution was developed and implemented using the finite volume method. This model embeds an analytical approach regarding the permeability and capillary pressure from arbitrary pore size distributions. Subsequently, a set of varying pore size distributions are investigated, and their impact on the species redistribution during drying is quantified. It was found that small amounts of large pores speed up the drying process and reduce internal pressure build up significantly while having a negligible impact on the final distribution of the catalytically active species. By further increasing the amount of large pores, the accumulation of species at the drying surface is facilitated.

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“…Metal precursor introduction by impregnation, ion-exchange and precipitation are some steps to produce reactional dispersion but, most of these methods depend on a sequence of unit operations such as filtration (wash to remove the solvent used in impregnation), dispersion drying (originating precursor) and calcination to obtain catalysts [7]. Overall, the drying step is carried out in oven, with or without air recirculation, at temperature ranging from 80 ºC to 200 ºC to produce catalysts in laboratory environment [7]. This drying method can generate particles presenting different shapes and spatial structure, at wide-size range [2].…”

Section: Introductionmentioning

confidence: 99%

Characterization of niobium photocatalyst precursor obtained by spray drying

Sartor¹,

Rodrigues²,

Chaguri³

Proceedings of the 22nd International Drying Symposium on Drying Technology - IDS '22

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Finding variations in unitary operations in the synthesis and drying method, applied to the obtainment of Nb2O5/carbon xerogel, is the aim of in the present study. Feed (dispersion) preparation led to some variations in unit operations. Dispersion was spray dried at 115 ºC, 1.25 m 3 /min and 0.15 L/h; it presented 38. 024.4 kg/m 3 . Moisture content in the product reached 0.89 % dry basis; particle and tapped density reached 5,413.3 and 287.9 kg/m 3 , respectively; and spherical particle size ranged from 1 to 21 μm.

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Drying of supported catalysts for high metal concentrations: A reduced parameter model

Cited by 7 publications

References 40 publications

High-throughput screening of multimetallic catalysts for three-way catalysis

High-throughput screening of multimetallic catalysts for three-way catalysis

Modeling the Drying Process of Porous Catalysts: Impact of the Pore Size Distribution

Characterization of niobium photocatalyst precursor obtained by spray drying

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