1. EMERGING TRENDS IN SEPARATION SCIENCE AND TECHNOLOGY - SESTEC 2016
Detailed study on the variation of particle size of precursor powder with pore size distribution of ceramic membranes
Murchana Changmai1 and Mihir Kumar Purkait2 1 Dept.of Chemical Engineering, 2 Dept. of Chemical Engineering Indian Institute of Technology, Guwahati, Assam
EMERGING TRENDS IN SEPARATION SCIENCE AND TECHNOLOGY - SESTEC 2016

2. Introduction What are we trying to answer …
Porous ceramic membrane with wide applicability range
Remarkable
Physical properties
Processing parameters
Cleaning
viability
What are we trying to answer …
The role of particle size on the pore size of low cost ceramic membrane.

3. What have WE done ?
Reduce the initial particle size of the precursor powder
Prepare membranes
Study the physical and chemical changes
Application

4. How did we do it? Grinding medium Ball mill MB 1 MB 2 MB 3 Mono mill
Planetary mill
MB 1
MB 2
MB 3
Precursor particle size reduction
Add Pore forming agents
Mechanical strength inducing agents
Thorough mixing with Millipore water
Casting in a metallic ring
Drying the prepared membrane
Sintering the membrane
Grinding medium
Ball mill
Mono mill
Planetary ball mill
Particle size
102.4 µm
78.38 µm µm
MB-Membrane

5. Characterization Fourier transform infrared spectroscopy
Individual graphs of the raw materials were obtained.
Sintered samples had softer peaks in coamparison to non-sintered peaks.

6. Thermogravimetric analysis (TGA)
With decreasing particle size the sintering temperature decreased.
Effective grain coarsening.

7. X-Ray Diffractometer (XRD) analysis
Major crystalline phases identified were quartz (Q), hematite (H) and mullite (M) and anhydrite (A)
With reduced particle size, intensity of peaks started reducing

8. Field emission scanning electron microscopy (FESEM) analysis
MB1
MB2
MB3
Field emission scanning electron microscopy (FESEM) analysis
Grinding medium
Ball mill
Mono mill
Planetary ball mill
Pore diameter
20-21 µm µm nm
Energy dispersive X-ray (EDX) analysis

9. Physical properties: % Apparent porosity:
% Water absorption:
% W.A = 𝑊 𝑊 − 𝑊 𝐴 𝑊 𝐴 ×100%
Bulk density:
B.D= 𝑀𝑎𝑠𝑠 𝑖𝑛 𝑎𝑖𝑟 (𝑔) 𝑉𝑜𝑙𝑢𝑚𝑒 𝑜𝑓 𝑤𝑎𝑡𝑒𝑟 𝑑𝑖𝑠𝑝𝑙𝑎𝑐𝑒𝑑 (𝑚𝑙)
Where WA = Weight in air (g)
WS = Soaked weight (g)
WSW = Suspended weight (g)
WA = Weight in air (g)
WW=Wet weight (g)
MB-Membrane

10. Particle size distribution of permeate
With decreasing pore size ,the Particle size of filtrate decreased.
Feed
Permeate 1
Permeate 2 µm
10.36 µm
1.04 µm

11. Conclusion

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13. Thank you