luminous fabric for wastewater treatment by photocatalysis ... · photocatalytic removal of vocs by...
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Luminous fabric for wastewater treatment by photocatalysis –AQUAPHOTEX ANR project
Laure Péruchon, project manager - Brochier technologies (France)
14th May 2014 - Delft
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q Contents
§ Brochier technologies company
§ R&D projects
§ Innovation
§ Experimental setup
§ Results
§ Conclusions
§ Prospects
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q Brochier technologies company
§ Setting-up Brochier Technologies in 2007§ 12 personnes§ Main activity:
Ø Lighting solutions using optical fiber fabric
§ Application fields:Ø Lighting – backlighting – design – customized systemsØ Transport industry – architecture - safety clothing - medical field ….
§ Lightex® technology :
1.Weaving the optical fibers 2. Side emitting process
3. Light link
Side-emitting in optical fiber
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q R&D projects§ R&D projects :Works supported by the French National Research Agency (ANR).
Ø ANR PHOTEX (2007-2010) : Photocatalytic removal of VOCs by a new textile composed of optical fibers.
Project partners : 1) IRCELYON, an academic research laboratory entirely dedicated to catalysis2) Brochier technologies, a company specialized in weaving of optical fibers
Ø ANR AQUAPHOTEX (2011-2015) : Luminous fabric for wastewater treatment by photocatalysis.
Project partners : 1) IRCELYON, laboratory2) Brochier technologies, company3) LISPB – INSA, an academic research laboratory focused on modeling of fluid transfer
§ Application fields:Ø Environment : air and water purification
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q Innovation
§ Technologies :Ø Lighting optical fiber fabric
Ø Photocatalysis : This process is used for air and water purification and leads to the photo-mineralization of many pollutants.
§ Innovation :Ø Combination of both technologies § Maximize the meeting of UV / photocatalyst / pollutant molecule
§ Textile = UV irradiation source and support of the photocatalyst - it optimizes the surface of
contact between UV light and the photocatalyst
§ Optimize the ratio volume/surface of the system to reduce the size of UV source
§ Produce some systems adaptable: extra thin system, flexible, deported UV source
UV Light
VOCTiO2
Photo-catalysis
BV
BC
e-
hν
Pollutants
O2, H2O
Products(CO2, H2O…)
TiO2
Fig 1 : Principle of the Photocatalysis Fig 2 : conditions for photocatalysis
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q Innovation§ Development of a new type of material, based on the association of microtexturated optical fiber fabric, developed by Brochier Technologies and photocatalyst (TiO2) for an application in wastewater treatment
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q InnovationOptical fiber fabric and Photocatalyst (TiO2)
§ Textile fibers : PE (PolyEster)§ Optical fibers : PMMA core (MethylPolyMethAcrylate) + PVDF cladding(PolyVinyliDene Fluoride)§ Light source : UV LED
§ Photocatalyst : TiO2§ Intermediate layer : SiO2§ Coating methods :o bath (dyeing),o dip-coating§ Pollutant: Formic acid, HCOOH
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q Experimental set up
§ TestsV0= 220 mLC0 = 50 ppm HCOOHFlow = 1650 mL/min è Chemical regime
Analysis method : HPLC
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q Results§ Characterization of the TiO2 and SiO2 layerØ Homogeneity of the deposit at the surface of the optical fiber fabric :
SEM (Scanning Electron Microscopy) analysis
TiO2 : « CGA »
SiO2 : « W7622 »
Optical fiber fabric before enduction
TiO2 : « TAG »
SiO2 : « Snowtex »SiO2/TiO2 : « xerogel »
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q Results§ Characterization of the TiO2 and SiO2 layerØ Irradiance before and after the deposition : absorbance of the UV by the TiO2 layer
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q Results§ Photocatalytic performances of the fabric samplesØ degradation of the formic acid by photocatalysis as a function of the reaction time
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q Results§ Photocatalytic performances of the fabric samplesØ degradation rate of the formic acid as a function of TiO2 mass deposited on the fabric
Deposit Mass of the coated fabric (g)
Equivalent mass TiO2 (g)
v (μmol/min)
v specific(μmol/min*g of TiO2)
TAG50 + SiO2 12,57 0,047 2,1 44,7
CGA 12,87 0,607 2,1 3,5
W7622/11 + CGA 12,91 0,485 2,3 4,7
W7622 + CGA 13,00 0,366 2,1 5,6
Xerogel 10%Ti-10%Si / monolayer 12,94 0,435 1,6 3,7
Xerogel 5%Ti-5%Si / bilayer 12,84 0,375 2,2 5,0
Xerogel 10%Ti-10%Si / bilayer 13,24 0,798 2,2 2,7
Xerogel 15%Ti-15%Si / monolayer 13,25 0,744 1,9 2,5
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q Conclusions§ Textile properties : Compact size, flexibility, lightweight, distribution and light scattering
on various surfaces, adapting the product based on the application : frontal and tangential.
§ UV LED source : remote source, inertia textile fiber - does not conduct electricity, long life (10 000h) and low power LED (3W)
§ Photocatalytic performances : Conditions : Flow rate 1650 mL/min
Ø formic acid degradation : 2,2 μmol/min = 132 μmol/h (Sfabric : 0,01m²) =Ø 13,2 mmol/h/m² (initial concentration of pollutant : C0 = 50 ppm HCOOH)
Ø phenol degradation : 0,35 µmol/min = 21 μmol/h (Sfabric : 0,01m²) =Ø 2,1 mmol/h/m² (initial concentration of pollutant : C0 = 17 ppm C6H6O)
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q Prospects
§Wastewater treatment
Ø Industrial wastewater : problematic organic (silicone, HAP, solvent..,)Ø Pharmaceutical wastewater : traces of drugsØ Agricultural wastewater : problematic pesticidesØ…
§ R&D project for industrial application
ØWastewater problematic of an industrial companyØ Consortium : Brochier technologies, end-user, laboratoryØ European project ?Ø…
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Thank you for your attention
ContactBROCHIER TECHNOLOGIES SAS
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Laure Peruchon, project managerPhone : +33 4 37 56 85 64
E-mail : [email protected]