Second Generation Lignin Seminar ________ New Lignin Generation through Biorefineries - PowerPoint PPT Presentation

1 / 11
About This Presentation
Title:

Second Generation Lignin Seminar ________ New Lignin Generation through Biorefineries

Description:

Valorization of cellulose as is (such as fibers for paper paste) ... For example, CIMV, using acetic and formic acid at low temperature. ... – PowerPoint PPT presentation

Number of Views:458
Avg rating:3.0/5.0
Slides: 12
Provided by: mart113
Category:

less

Transcript and Presenter's Notes

Title: Second Generation Lignin Seminar ________ New Lignin Generation through Biorefineries


1
Second Generation Lignin Seminar ________New
Lignin Generation through Biorefineries
2
New Biomass Valorizations
  • Roughly nowadays, the pathway
  • Extraction of cellulose and hemicelluloses
  • Valorization of cellulose as is (such as fibers
    for paper paste)
  • Polysaccharides hydrolysis to hexoses and
    pentoses
  • Green chemistry on sugars, or fermentation of
    sugars to bioethanol
  • Valorization of by products waxs, proteins,
    terpenes, talloil, etc...
  • ? Fate of LIGNIN?

3
Bioefinery
Annual or pluriannual biomass, by-products
Cooler
Chemistry
Polymers
Nutrition
Propanediol
Succinic ac.
Lactic ac.
Amino ac.
Lignin Hemicelluloses Cellulose
Cellulosic paste for paper
Biothanol
.....
Fermentation
Enzymes cellulases
Glucose
Grinding
Biofuel
.
.
Insolubles
.
.
.
.
Time
.
.
.
.
.
.
.
.
.
Pretreatement
.
.
.
Press Decantor Filter
Heat Chemicals Enzymes
Lignin
Solubles
Lignin
Surfactants Polyalcohol Furfural
Pentoses
Chemistry
4
Raw Materials Sourcing
5
Biorefinery processes
  • Specifications needed
  • Preservation of cellulose
  • Low degradation of pentoses
  • And then, what about  residues 

6
Cellulose Pretreatment for EtOH
  • Targets
  • reducing crystallinity
  • increasing digestibility
  • washing of hemicellulose and lignin
  • Means
  • -acidic or alkalin impregnation
  • -thermal and mechanical treatment
  • -enzymes for hemicellulose hydrolysis
  • Results
  • -90 to 95 cellulose recovery
  • -85 to 95 cellulose digestibility
  • -75 to 95 pentoses recovery
  • -how lignin looks like? how knows?

Steam explosion
New smooth processes
7
Cellulose recovery for paper
Existing processes (Kraft, bisulfite) do not
preserve lignin. New processes (Organoslv, CIMV)
help to recover less modified lignin. For
example, CIMV, using acetic and formic acid at
low temperature. ?Lignin is still the last
by-product, after cellulose and hemicellulose A
big issue for lignin separation and
purification processes adapted to several kinds
of lignin.
8
New lignin recovery
Washing
Screening
Liquid/solid Separation
Drying?
9
Biorefinery an opportunity for lignin
  • An example
  • A bioethanol cellulosic plant reliable with
    175000 To of Ethanol
  • Input 1million To of biomass Output 250000
    Tonnes of  lignin 
  • Biorefinery
  • has to crack the whole plant
  • has to be flexible to switch to other raw
    materials
  • has to valorize each fraction in accordance with
    market price variation
  • ? LIGNIN is a part of the system, such as the 2
    others polymers.

10
Fates of lignin
  • The big issue with lignin are
  • there is one cellulose, some hemicellulose and a
    world of lignin
  • lignin are derived from processes driven by
    polysaccharides
  • remaining lignin is not alone what about purity
    and extraction?
  • biorefinery are mostly aqueous processes, not
    compatible with lignin
  • To summarize, lignin is the last stream to be
    valorized.
  • Last, but not least, lignin could be also
  • an interesting guinea-pig for chemist
  • - a biocombustible for heat and power generation
    in biorefinery
  • a load for feed / concrete / boards,....
  • but probably the most promising building block
    for aromatic chemistry

11
Conclusion - Outlook
  • Until proof-of-principle of reasonable
    valorization of lignin, poor adaptation of
    processes for cellulose and hemicellulose will be
    implemented in biorefinery to preserve lignin.
  • But biorefinery is probably the best area to
    promote and succeed in a new lignin chemistry.
  • We have to bring economical, technical,
    environnemental evidences of interest of lignin
    to guide choices
  • process
  • purification
  • properties
  • price
Write a Comment
User Comments (0)
About PowerShow.com