HMBSP: Application of hybrid based separation processes for … · 2019. 11. 5. · HMBSP:...
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HMBSP: Application of hybrid membrane based separation processes for treatment of industrial wastewater TEAM MEMBERS:Prof. Sirshendu De, IIT Kharagpur , India Prof. J. Coronas, Univ of Zaragosa, Spain Prof. C. Janiak, Univ. of Dusseldorf, Germany
Transcript of HMBSP: Application of hybrid based separation processes for … · 2019. 11. 5. · HMBSP:...
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HMBSP: Application of hybrid membrane based separation processes for treatment of industrial wastewater
TEAM MEMBERS:Prof. Sirshendu De, IIT Kharagpur , IndiaProf. J. Coronas, Univ of Zaragosa, SpainProf. C. Janiak, Univ. of Dusseldorf, Germany
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Fluoride removal using Cellulose Acetate-Alumina mixed matrix membrane
Sirshendu DeDepartment of Chemical Engineering, Indian Institute of Technology
Kharagpur, Kharagpur 721302, [email protected]
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Hazards of fluoride contamination in drinking water
Effects on the human body
Neurotoxic agent Changes Bone Structure and Strength
Impairs Immune SystemCauses Initial Stages of Skeletal Fluorosis
Contributes to the Development of Repetitive Stress Injury
Allowable limit in drinking water:-1.5 ppm
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Fluoride Presence Within India
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PrecipitationAdsorption on promising adsorbents like Alum,charcoal ,ash ,Alumina Reverse osmosis
Conventional remedial measures adopted
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Membrane preparation
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Membrane characterization Pure Water Flux -The linear permeability decreases from 1.82x10-11-9.79x10-12m/ Pa.s
for Alumina wt. % from 0 %-35 %. Molecular Weight Cut Off (MWCO) -The MWCO decreases from 63 K-12.86 K for
Alumina wt. % from 0 %-35 %. %Porosity-The % porosity variation is from 41%-9% for Alumina wt. % From 0-35%. Pore radius variation- The pore radius variation is from 79 Å-35 Å for Alumina wt. % From
0-35%. Maximum stress-The maximum withstand able stress that the membrane can support varies
from 20 N/mm²-1.92 N/mm², for Alumina wt. % From 0-35%. FTIR analysis- The FTIR analysis of the membrane samples (35% Al & 20% CA) has been
done before and after batch cell run with fluoride solution. Morphology- Analysis has been done with scanning electron micrographs, revealing the
presence of depressions made by granular Alumina particles, in which the fluoride ions gets clogged.
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Variation of different characterization properties
PWF (linear permeability) MWCO (molecular weight cut off)
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Variation of different characterization properties
porosity Pore radius
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Variation of different characterization properties
FTIRMaximum stress
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Morphology Top/Cross sectional view
0% Al 35% Al20% Al
0% Al 35% Al
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Fluoride Rejection and Flux decline (For a 35 wt.% Alumina and 20 wt.% CA membrane)
Flux decline w.r.t time
Permeate concentration variation w.r.t time
12 ppm 8 ppm
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Membrane resistances
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Conclusions CA-alumina mixed matrix membrane is able to
remove fluoride from water.Alumina above 35 w/w % with CA 20 w/w % leads
to casting problems, so this composition isrecommended.
The recommended membrane gives satisfactorypermeate concentration at comparatively lowpressure.
Membrane hydraulic resistance and fouling resistanceare comparable.
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Nanocomposites, mixed‐matrix membranes for gas separation
PSF-MIL-101mixed-matrix membrane MMM,
▬ 20-60 µm
C O SO
CH3
CH3
O
O
Polysulfone (PSF) repeating unit
Chem. Commun. 2012, 48, 2140.MIL-101
3.4nm
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zeolitesactivecarbon
metal-organic frameworks, MOFs orporous coordination polymers, PCPs
Kitagawa, Matsuda, Coord. Chem. Rev.2007, 251, 2490–2509.
Nanopores in Metal‐Organic Frameworks (MOFs)
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metal-atom/cluster
organicligand
Metal‐Organic Frameworks (MOFs) – construction principle
Yaghi et al, Nature 1999, 402, 276.
O
OO
O
benzene-1,4-dicarboxylate,terephthalate, bdc
{Zn4(µ4-O)} +
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Yaghi et al, Nature 1999, 402, 276.
Metal‐Organic Frameworks (MOFs) – construction principle
MOF-5inner surface~2900 m2/g
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poreMOF-5inner surface~2900 m2/g
Yaghi et al, Nature 1999, 402, 276.
Metal‐Organic Frameworks (MOFs) – construction principle
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H2 O2 N2 CO2 CH4
Kineticdiameter (Å)
2.9 3.46 3.64 3.3 3.8
Polymer phase
Porous inorganic particle phase,e.g. MOF
Chung et al., Prog. Polym. Sci., 2007, 32, 483.Li et al., Coord. Chem. Rev., 2011, 255, 1791.
Dalton Trans. 2012, 41, in press. http://dx.doi.org/10.1039/C2DT31550E
Mixed‐matrix membranes (MMMs) for gas separation– Polymer‐MOF membranes
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Chem. Commun. 2012, 48, 2140.
Mixed‐matrix membranes with MOFs for gas separation– PSF‐MIL‐101 membrane
O2/N2 separation
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7.5 wt%MIL load
14 wt%MIL load
19 wt%MIL load Chem. Commun. 2012, 48, 2140.
a = Cu-bpy-hfs,b = MOF-5,c = HKUST-1, Cu-btc,d = Mn(HCOO)2
O2/N2 separation
PSF‐MIL‐101 MMM for gas separation– comparative studies
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CO2 / N2
CO2 / CH4
Membranes 2012, 2 , 727.
PSF‐MIL‐101 membrane – CO2 separation from N2 or CH4
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Mixed-matrix membranes with MOFs for gas separation– the goal
Dalton Trans. 2012, 41, in press. http://dx.doi.org/10.1039/C2DT31550E
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Acknowledgements
Claudia Staudt, GMM/MBASF SE [email protected]
Janina DechnikSubarna DeyDr. Harold Tanh
