MATERIA NOVA - avniR · Use of LCA tools in the early stages of a research project - A case study...

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Le Fonds Européen de Développement Régional et

la Région Wallonne investissent dans votre avenir

MATERIA NOVA

Use of LCA tools in the early stages of a research project

- A case study about an innovative process for cellulose

nanocrystals extraction

Olivier Talon, Séverine Coppée, Jevgenij Lazko,

Tangi Sénéchal, Jean-Marie Raquez

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Birth of a new unit at Materia Nova

justification of environmental added value

asked to obtain grants for a new project

many projects meant to have environmental

dimension (biobased plastics, biotechnologies,

solar cells…)

high interest in making a priori and a posteriori

environmental impact studies for our projects

creation of a new environmental impact unit

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microfibril

fiber

H2SO4 Heating

Centrifugation Dialysis

Cellulose Fiber Cellulose Nanocrystals

Cellulose nanocrystals extraction

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Process not so green

High consumption of acid and water

Cellulose nanocrystals :

High Young’s Modulus (=steel)

Interesting shape/aspect ratio (needle like)

Extracted from biomass (potentially from local biomass)

Green nanoparticles

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Ionic Liquids are presented as green solvents of cellulose :

Reuse of reagent

+ Recyclability

+ Low VOC emissions

+ Good solvation of lignocellulose

Low amount of sulfuric acid

Decrease of water consumption during purification

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- Environmental cost of IL production?

Currently not industrial scale product

- How much recycling to improve our process?

How many cycles needed for environmental benefit?

How many possible to keep a good extraction?

The success of nanocrystals extraction at bench will not directly

provide information about the greenness of the process

First bench results coupled with Simple LCA can help to pinpoint

critical points

Background of the study

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Background of the study Evaluation of the “greenness” potential of the study

Simultaneous kick-off as first lab experiments

Identification of hotspots

hydrolysis

water

H2SO4 hydrolysis

[BMIM]Cl water

H2SO4

purification water purification

water

H2SO4 H2SO4

[BMIM]Cl

CNC

fibers

CNC

fibers

[BMIM]Cl

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Comparison of lab scale processes

s-o-a and experimental data

Virtual upscaling of the new process

(industrial scale)

Need to recover values of

s-o-a process

No data on detailed or described

industrial process

NE

W S

TR

AT

EG

Y

Comparison needs data for same scale of production

Background of the study

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Highly simplified hypotheses

Identical yields and raw materials

fibers out of system boundaries

No intrinsic impact of BMIM Recycling modeled by input division

Same energetic input not taken into account

No effluent treatment treated as emission to water

Same nanocrystal quality

FU = treatment for 1 kg of CNC

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Data collection / choice of the method

Emissions : Choice of a proxy based on toxicology literature (phenol)

LCA literature negligible about IL or CNC, non existent for the combination

Material inputs: firsts lab tests estimation

No IL in the DB, neither as process nor as substance

DB : no waste water treatment for a comparable process

1 publication about LCA of [BMIM]Cl production

Calculation method:

- including phenol and H2SO4 emissions

- including a “water depletion” category

restricted choice: ILCD 2011 Midpoint

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BMIM-Cl modelisation

From literature, Righi 2011

Single score, Eco-indicator

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Impacts of the different processes

ILCD calculation

0

20

40

60

80

100

[BMIM]Cl process / 10 cycles

sulphuric acid process

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Major impact contributors for « BMIM » process

ILCD calculation

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BMIM-Cl

water / purification

water / hydrolysis

sulphuric acid

process emissions

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Optimisation way of BMIM process

IL recycling optimization

ILCD calculation

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process BMIM V2 - 10 cycles



process sulfu V4

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BMIM-Cl synthesis optimization (yield)

ILCD calculation

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BMIM[Cl] process / 10 cycles

BMIM[Cl] process / 10 cycles / optimized IL synthesis

sulphuric acid process

Optimisation way of BMIM process

48%90%

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Conclusions

Necessity to refine the model:

- treatment/ recycling of the acid

- intrinsic impact of recycling of ionic liquid (if cycles nb increased)

First results

environmental benefit is not automatic

Numerous ways of improvement:

- IL recycling (> 20 cycles in some publications)

- “greener” production of [BMIM]Cl (or other ILs) ? (not matured production, scale effect, biosourcing…)

- Yield and quality of CNC ? FU modification ?

(theoretical better thermal resistance)

Scientific contribution of the project is not in balance with LCA

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MATERIA NOVA

Olivier Talon, Séverine Coppée, Jevgenij Lazko,

Tangi Sénéchal, Jean-Marie Raquez

Email adress : [email protected]

Thanks for your attention

MATERIA NOVA - avniR · Use of LCA tools in the early stages of a research project - A case study...

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Transcript of MATERIA NOVA - avniR · Use of LCA tools in the early stages of a research project - A case study...