structures Dr. Ing. Daniel Jussen B. Sc. David Lthy Dr. Ing. Peter - - PowerPoint PPT Presentation

▶
structures
SMART_READER_LITE
LIVE PREVIEW

structures Dr. Ing. Daniel Jussen B. Sc. David Lthy Dr. Ing. Peter - - PowerPoint PPT Presentation

Sep 23, 2022 448 likes •564 views

Mixing in microfluidic structures Dr. Ing. Daniel Jussen B. Sc. David Lthy Dr. Ing. Peter Riedlberger Microprocess engineering and particulate systems Advantages: Challenges: Rapid mixing Macro to micro interface Defined

slide-1
SLIDE 1

Mixing in microfluidic structures

  • Dr. Ing. Daniel Jussen
  • B. Sc. David Lüthy
  • Dr. Ing. Peter Riedlberger
slide-2
SLIDE 2

Microprocess engineering and particulate systems

Advantages:

  • Rapid mixing
  • Defined temperature

control

  • Continuous processing
  • Ease of serial reactions
  • Favorable for hazardous

processes

  • Ease of Scale up
  • Flexible processes

Challenges:

  • Macro to micro interface
  • Backpressure
  • Fouling
  • Overhead
slide-3
SLIDE 3

Microfluidic mixing concepts

Kashid, M. N., Renken, A., & Kiwi-Minsker, L. (2015). Microstructured Devices for Cemical Processinf. Campos Domínguez, C., & Gamse, T. (2016). Process intensification by the use of micro devices for liquid fractionation with supercritical carbon dioxide. Chemical Engineering Research and Design, 108, 1–7. http://doi.org/10.1016/j.cherd.2016.01.011

Multilamelar mixer (Simm V2) High collision mixer

slide-4
SLIDE 4

Mixing efficiency – Test reaction

4

Competitive parallel reaction

𝑌𝑡 = 𝑍 𝑍

𝑇𝑈

𝑌𝑡= Segregation index 𝑍= Y is the ratio of acid mole number consumed by reaction (2) to the total acid mole number 𝑍

𝑇𝑈= Y in the total segregation case when the micromixing process is

infinitely slow

slide-5
SLIDE 5

Villermaux-Dushman Method

 I3

  • detectable 353 nm
slide-6
SLIDE 6

Villermaux-Dushman Method

SIMM-V2 (multilamellar mixer) R300 (SAR/caterpillar mixer) R600 (SAR/caterpillar mixer)

Segregation index (XS) depence on the mixer type and flow rate (Q)

slide-7
SLIDE 7

Precipitation of Bariumsulfate

7

Model reaction: Ba2+ SO4

2-  BaSO4

SIMM-V2 (multilamellar mixer) Batch process

left: particle size distribution for diferent mixers and batch reaction, right: dependence of the mean particle diameter for different mixers

Intensity /%

M4 (high collision mixer) R600 (SAR/caterpillar mixer) R300 (SAR/caterpillar mixer)

Particle Size d/ nm flow rate Q /mL min-1

slide-8
SLIDE 8

Summary and Outlook

  • Mixing has significant influence on reactions
  • Choice of mixer influences reaction and

performance

  • Utilization of microfluidic mixing setups for a

model process

– P/TiO2 process for exemplary process intensification – Fouling remidation studies for exemplary process

slide-9
SLIDE 9
slide-10
SLIDE 10

Villermaux-Dushman Method

𝑌𝑡 = 𝑍 𝑍

𝑇𝑈

𝑌𝑡 = Segregation index 𝑍 = Y is the ratio of acid mole number consumed by reaction (2) to the total acid mole number 𝑍

𝑇𝑈

= Y in the total segregation case when the micromixing process is infinitely slow