luminous fabric for wastewater treatment by photocatalysis ... · photocatalytic removal of vocs by...

www.brochiertechnologies.com

Luminous fabric for wastewater treatment by photocatalysis –AQUAPHOTEX ANR project

Laure Péruchon, project manager - Brochier technologies (France)

14th May 2014 - Delft


q Contents

§ Brochier technologies company

§ R&D projects

§ Innovation

§ Experimental setup

§ Results

§ Conclusions

§ Prospects


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


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


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


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


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


q Experimental set up

§ TestsV0= 220 mLC0 = 50 ppm HCOOHFlow = 1650 mL/min è Chemical regime

Analysis method : HPLC


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 »


q Results§ Characterization of the TiO2 and SiO2 layerØ Irradiance before and after the deposition : absorbance of the UV by the TiO2 layer


q Results§ Photocatalytic performances of the fabric samplesØ degradation of the formic acid by photocatalysis as a function of the reaction time


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


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)


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…


Thank you for your attention

ContactBROCHIER TECHNOLOGIES SAS


Laure Peruchon, project managerPhone : +33 4 37 56 85 64

E-mail : [email protected]

luminous fabric for wastewater treatment by photocatalysis ... · photocatalytic removal of vocs by...

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