Direct synthesis of hydrogen peroxide in a wall-coated microchannel reactor over Au–Pd catalyst: A performance study

Paunovic, V.; Schouten, J.C.; Nijhuis, T.A.

doi:10.1016/j.cattod.2014.04.007

Cited by 35 publications

(18 citation statements)

References 44 publications

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“…An elegant solution to the environmental problems described lies in process intensification which is possible in microreactors [15][16][17][18]. Microreactors provide high surface to volume ratio of several orders of magnitude as high as batch reactors, which results in high heat-and mass-transfer rates [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Cherkasov

Ibhadon

Rebrov

2016

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 99%

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Cherkasov

Ibhadon

Rebrov

2016

Applied Catalysis A: General

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“…Varying WHSV and G/L can alter the size of gas bubbles and liquid slugs, and consequently gas-liquid- solid mass transfer rates. 27 The unaffected productivities in both cases confirms that with the very slow kinetic of methane activation, mass transfer is not the limiting factor in the process.…”

Section: View Article Onlinementioning

confidence: 62%

“…By increasing G/L from 2.5 to 5, peroxide concentration in the outlet slightly increased from 0.21 to 0.28 wt%, which is in agreement to our previous study on H 2 O 2 synthesis. 27 However, neither the oxygenate productivity nor the MeOH/OX ratio (Fig. 8b) were affected by G/L ratio.…”

Section: View Article Onlinementioning

confidence: 89%

Towards coupling direct activation of methane with in situ generation of H₂O₂

Delparish

Kanungo

Schaaf

et al. 2019

Catal. Sci. Technol.

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Due to the explosive nature of H 2 , O 2 and CH 4 mixtures, the concept of coupling in situ synthesis of H 2 O 2 with low-temperature single-step methane conversion to methanol has not received sufficient attention.This study aimed to investigate this process using a microchannel reactor, which offers the opportunity to explore the process under a wide range of concentrations. Direct methane activation with in situ generation of H 2 O 2 was successfully demonstrated in a microcapillary containing Au-Pd nanoparticles embedded on its silica-coated walls. The effect of H 2 , O 2 and CH 4 partial pressures, H 2 /O 2 molar ratio, gas-to-liquid (G/L) ratio and liquid phase weight-hourly-space-velocity (WHSV) on the productivity and product distribution was investigated. CH 4 partial pressure had the most significant effect on the productivity, while H 2 and O 2 partial pressures influenced the productivity less. The methane activation rate was found to be correlated with the H 2 O 2 formation rate. With only O 2 or pre-formed stabilized H 2 O 2 methane activation was not found, in situ H 2

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“…Paunovic et al reported a production process using the same catalysts in a microchannel reactor. The researchers were able to obtain five mass percent H 2 O 2 solutions at a conversion rate of 15% at 42% selectivity (315 K, 2.0 MPa, 0.05 M H 2 SO 4 , 9 parts per million (ppm) NaBr, H 2 /O 2 ratio 20%) [73]. Voloshin et al elucidated the mass transfer mechanism that occurs in a microreactor during the direct synthesis of H 2 O 2 (Figure 2b).…”

Section: Reactor Designmentioning

confidence: 99%

Recent Advances in the Direct Synthesis of Hydrogen Peroxide Using Chemical Catalysis—A Review

2018

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Hydrogen peroxide is an important chemical of increasing demand in today’s world. Currently, the anthraquinone autoxidation process dominates the industrial production of hydrogen peroxide. Herein, hydrogen and oxygen are reacted indirectly in the presence of quinones to yield hydrogen peroxide. Owing to the complexity and multi-step nature of the process, it is advantageous to replace the process with an easier and straightforward one. The direct synthesis of hydrogen peroxide from its constituent reagents is an effective and clean route to achieve this goal. Factors such as water formation due to thermodynamics, explosion risk, and the stability of the hydrogen peroxide produced hinder the applicability of this process at an industrial level. Currently, the catalysis for the direct synthesis reaction is palladium based and the research into finding an effective and active catalyst has been ongoing for more than a century now. Palladium in its pure form, or alloyed with certain metals, are some of the new generation of catalysts that are extensively researched. Additionally, to prevent the decomposition of hydrogen peroxide to water, the process is stabilized by adding certain promoters such as mineral acids and halides. A major part of today’s research in this field focusses on the reactor and the mode of operation required for synthesizing hydrogen peroxide. The emergence of microreactor technology has helped in setting up this synthesis in a continuous mode, which could possibly replace the anthraquinone process in the near future. This review will focus on the recent findings of the scientific community in terms of reaction engineering, catalyst and reactor design in the direct synthesis of hydrogen peroxide.

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Direct synthesis of hydrogen peroxide in a wall-coated microchannel reactor over Au–Pd catalyst: A performance study

Cited by 35 publications

References 44 publications

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Towards coupling direct activation of methane with in situ generation of H₂O₂

Recent Advances in the Direct Synthesis of Hydrogen Peroxide Using Chemical Catalysis—A Review

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Direct synthesis of hydrogen peroxide in a wall-coated microchannel reactor over Au–Pd catalyst: A performance study

Cited by 35 publications

References 44 publications

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Towards coupling direct activation of methane with in situ generation of H2O2

Recent Advances in the Direct Synthesis of Hydrogen Peroxide Using Chemical Catalysis—A Review

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Towards coupling direct activation of methane with in situ generation of H₂O₂