Hydrodynamic effects on three phase micro-packed bed reactor performance – Gold–palladium catalysed benzyl alcohol oxidation Article Swipe
Noor Al‐Rifai
,
Federico Galvanin
,
Moataz Morad
,
Enhong Cao
,
Stefano Cattaneo
,
Meenakshisundaram Sankar
,
Vivek Dua
,
Graham J. Hutchings
,
Asterios Gavriilidis
·
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.1016/j.ces.2016.03.018
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.1016/j.ces.2016.03.018
The hydrodynamics of a three-phase micro-packed bed reactor and its effect on catalysed benzyl alcohol oxidation with pure oxygen were studied in a silicon–glass microstructured reactor. The microreactor was operated at 120 °C and 1 barg and contained a channel with a 300 μm×600 μm cross-section, packed with 1 wt% Au–Pd/TiO2 catalyst, 65 μm in average diameter. Improvements in the conversion of benzyl alcohol and selectivity to benzaldehyde were observed with increasing gas-to-liquid ratio, which coincided with a change in the flow pattern from a liquid-dominated slug to a gas-continuous flow regime. The observed enhancement is attributed to improved external mass transfer, associated with an increase in the gas–liquid interfacial area and reduction in the liquid film thickness that occur with gradual changes in the flow pattern. A maximum selectivity of 93% to benzaldehyde was obtained under partial wetting – which introduced the added benefit of direct gas–solid mass transfer – outperforming the selectivity in a conventional glass stirred reactor. However, this was at the expense of a reduction in the conversion. A response surface model was developed and then used to predict optimal operating conditions for maximum benzaldehyde yield, which were in the gas-continuous flow regime. This corresponded to relatively high gas flow rate in conjunction with moderate liquid flow rate, ensuring sufficient catalyst wetting with a thin film to reduce transport resistances
Related Topics
Concepts
Microreactor
Benzyl alcohol
Benzaldehyde
Packed bed
Selectivity
Wetting
Catalysis
Volumetric flow rate
Mass transfer
Chemical engineering
Materials science
Yield (engineering)
Chemistry
Analytical Chemistry (journal)
Slug flow
Chromatography
Two-phase flow
Composite material
Organic chemistry
Flow (mathematics)
Thermodynamics
Physics
Engineering
Geometry
Mathematics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1016/j.ces.2016.03.018
- https://ars.els-cdn.com/content/image/1-s2.0-S0009250916301166-fx1_lrg.jpg
- OA Status
- hybrid
- Cited By
- 68
- References
- 45
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2304855475
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2304855475Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1016/j.ces.2016.03.018Digital Object Identifier
- Title
-
Hydrodynamic effects on three phase micro-packed bed reactor performance – Gold–palladium catalysed benzyl alcohol oxidationWork title
- Type
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articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2016Year of publication
- Publication date
-
2016-03-26Full publication date if available
- Authors
-
Noor Al‐Rifai, Federico Galvanin, Moataz Morad, Enhong Cao, Stefano Cattaneo, Meenakshisundaram Sankar, Vivek Dua, Graham J. Hutchings, Asterios GavriilidisList of authors in order
- Landing page
-
https://doi.org/10.1016/j.ces.2016.03.018Publisher landing page
- PDF URL
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https://ars.els-cdn.com/content/image/1-s2.0-S0009250916301166-fx1_lrg.jpgDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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hybridOpen access status per OpenAlex
- OA URL
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https://ars.els-cdn.com/content/image/1-s2.0-S0009250916301166-fx1_lrg.jpgDirect OA link when available
- Concepts
-
Microreactor, Benzyl alcohol, Benzaldehyde, Packed bed, Selectivity, Wetting, Catalysis, Volumetric flow rate, Mass transfer, Chemical engineering, Materials science, Yield (engineering), Chemistry, Analytical Chemistry (journal), Slug flow, Chromatography, Two-phase flow, Composite material, Organic chemistry, Flow (mathematics), Thermodynamics, Physics, Engineering, Geometry, MathematicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
68Total citation count in OpenAlex
- Citations by year (recent)
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2025: 9, 2024: 6, 2023: 7, 2022: 8, 2021: 8Per-year citation counts (last 5 years)
- References (count)
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45Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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