Design and parametric optimization of a fan-notched baffle structure mixer for enhancement of liquid-liquid two-phase chemical process
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Shuangfei Zhao
Abstract
The mixing uniformity plays a crucial role in a liquid-liquid two-phase chemical process. To quantify the uniformity of the liquid–liquid process, the specific surface area ratio is proposed and studied through computational fluid dynamics simulation. There is a scale effect in the liquid–liquid two phase chemical processing that the specific surface area ratio decreases to 7.01% when the diameter of the Y-like mixer increases from 1 mm to 10 mm. A millimeter-scale mixer with a fan-notched baffle structure was designed, and the baffle unit length, baffle tilt angle, baffle notch size and baffle thickness of the mixer were optimized. Compared with the 1 mm Y-like mixer, the specific surface area ratio of the 10 mm mixer with notched baffle structures increases to 2.5 times and the treatment capacity increases to 100 times. Additionally, experiment and simulation results prove that FNBS is considered to be a suitable structure for enhancing liquid-liquid two-phase. This study will provide a useful reference for the design of large-scale mixers applicable to liquid-liquid heterogeneous chemical processes.
Funding source: The Top-notch Academic Programs Project of Jiangsu Higher Education Institutions
Funding source: The National Key R&D Program of China
Award Identifier / Grant number: 2021YFC2101900, 2019YFA0905000
Funding source: Nanjing International Joint R&D Project
Award Identifier / Grant number: 202002037
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 21908094, 21776130 and 22078150
Funding source: Basic Research Program of Jiangsu Province (Natural Science Foundation)-Frontier Leading Technology Basic Research Project-Frontier Project
Award Identifier / Grant number: BK20212003
Funding source: Jiangsu Province Industrial Prospects and Key Core Technologies-Competitive Projects
Award Identifier / Grant number: BE2021083
Nomenclature
- A
-
The area of the radial section
- a
-
The baffle thickness
- A i
-
The area of the interface between two fluids in a certain radial section
- A s
-
The total area of the interface between two phases
- c
-
Mass fraction
- CFD
-
Computational Fluid Dynamics
- D
-
Molecular diffusion coefficient
- D i
-
The internal diameter
- F
-
Surface tension between two phases
- f 2
-
The Near wall attenuation function
- FNBS
-
Fan-notched baffle structure
- GC-MS
-
Gas chromatography-mass spectrometry
- k
-
The turbulent kinetic energy
- L s
-
The baffle unit length
- L Y
-
Tube diameter
- n
-
The number of sections
- p
-
Pressure
- Q
-
Treatment volume
- Re
-
Reynolds number
- S ij
-
The mean-velocity strain-rate tensor
- u
-
Velocity vector
- v
-
The flow rate
- V
-
The volume of the two phases
- VOF
-
Volume of fluid
- YLTM
-
Y-like tube mixer
-
-
Average curvature of the two-phase interface
-
-
The number of ester moles reacting with NaOH
-
-
The complete number of ester moles
- X s
-
The product distribution
-
-
The α at different radial planes
- ɛ
-
The turbulent dissipation rate
- α
-
Specific surface area ratio
- δ ij
-
Kronecker delta
- η
-
Dynamic viscosity
- θ 1
-
The baffle tilt angle
- θ 2
-
The baffle notch angle
- μ t
-
The eddy viscosity
- ρ
-
Density
- τ tij
-
The Reynolds stress
- φ ɛ
-
The Wall item
- φ k
-
The Wall item
-
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: The research has been supported by The National Key R&D Program of China (2021YFC2101900, 2019YFA0905000); Basic Research Program of Jiangsu Province (Natural Science Foundation)-Frontier Leading Technology Basic Research Project-Frontier Project (BK20212003); The National Natural Science Foundation of China (21908094, 21776130 and 22078150); Jiangsu Province Industrial Prospects and Key Core Technologies-Competitive Projects (BE2021083); Nanjing International Joint R&D Project (202002037); The Top-notch Academic Programs Project of Jiangsu Higher Education Institutions.
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Conflict of interest statement: The authors declare that we have no declaration of interest in connection with the work submitted.
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Articles in the same Issue
- Frontmatter
- Articles
- Design and parametric optimization of a fan-notched baffle structure mixer for enhancement of liquid-liquid two-phase chemical process
- Quantification of motion characteristics of vertically ascending bubbles in NaCl solution via image processing
- Particle crystallization by supercritical antisolvent processing techniques: the case of Retama raetam powder for pharmaceutical purposes
- Evaluation the performance of the tin (IV) oxide (SnO2) in the removal of sulfur compounds via oxidative-extractive desulfurization process for production an eco-friendly fuel
- Experimental and kinetic studies of biogas production from petroleum oily sludge by anaerobic co-digestion with animals’ dung at thermophilic conditions
- A study on the adsorption property and mechanism of β-cyclodextrin/polyvinyl alcohol/polyacrylic acid hydrogel for ciprofloxacin
- Evaluation of promoted Ni-based nanocatalysts in wall-coated microchannel reactor on the dry reforming of methane and effect of ultrasound waves on physiochemical properties of synthesized nanocatalysts
- Reaction engineering of continuous crystallization of β-ammonium tetramolybdate in concentric structure reactor and its application
- Bio-lubricant production based on epoxidized oleic acid derived dated palm oil using in situ peracid mechanism
Articles in the same Issue
- Frontmatter
- Articles
- Design and parametric optimization of a fan-notched baffle structure mixer for enhancement of liquid-liquid two-phase chemical process
- Quantification of motion characteristics of vertically ascending bubbles in NaCl solution via image processing
- Particle crystallization by supercritical antisolvent processing techniques: the case of Retama raetam powder for pharmaceutical purposes
- Evaluation the performance of the tin (IV) oxide (SnO2) in the removal of sulfur compounds via oxidative-extractive desulfurization process for production an eco-friendly fuel
- Experimental and kinetic studies of biogas production from petroleum oily sludge by anaerobic co-digestion with animals’ dung at thermophilic conditions
- A study on the adsorption property and mechanism of β-cyclodextrin/polyvinyl alcohol/polyacrylic acid hydrogel for ciprofloxacin
- Evaluation of promoted Ni-based nanocatalysts in wall-coated microchannel reactor on the dry reforming of methane and effect of ultrasound waves on physiochemical properties of synthesized nanocatalysts
- Reaction engineering of continuous crystallization of β-ammonium tetramolybdate in concentric structure reactor and its application
- Bio-lubricant production based on epoxidized oleic acid derived dated palm oil using in situ peracid mechanism
