presentation on bioproducts

7/25/2019 Presentation on Bioproducts

1/13

Picture 1. Voikkaa paper mill.


2/13

Picture 1. Voikkaa paper mill.


3/13

Concomitant production of dissolving pu

polymeric xylan and lignin from birch wo

OBJECTIVES

Examine how dissolving pulp,polymeric xylan and ligninproduction can be combined

New value-added productsfrom noncellulosic sidestreams

Taneli Rautio


4/13

Concomitant production of dissolving pu

polymeric xylan and lignin from birch wo

1. Process flowchart and structure

2. Comparison with existing

technology

3. Feasibility and conclusion


5/13

1. Process flowchart

Polymeric

Xylan

Dissolving

PulpLignin

Precipitation

Washing ofsolid residue

Pre-hydrolysis

Alkaline pre-extraction

Birch chips

Nano- anddiafiltration

SAQ pulping

Overliming,DTAC

Figure1. Hierarchy of combined production.


6/13

Process structure

1. Mechanical treatment of birch

2. Alkaline pre-extraction, NaOH/95oC3. Washing of solid residue

4. Pre-hydrolysis of solid residue, 160-180oC

Removal of hemicelluloses by autohydrolysis

5. Soda-anthraquinone (SAQ) pulping, SAQ/160oC

Delignification and bleaching to get dissolving Isolation of lignin from PHL with Overliming/D

6. Nano- and diafiltration

7. Precipitation

Polymeric xylan


7/13

2. Comparison with existing technolo

Benefits+ High-quality products

+ Products have diverseapplications and economicalvalue

+ Refining of all sidestreamscan be localized

Transportation costs can beminimized


8/13

2. Comparison with existing technolo

Benefits+ High-quality products

+ Products have diverseapplications and economicalvalue

+ Refining of all sidestreamscan be localized

Transportation costs can beminimized

Disadvantages- Dissolving pulp productrequires larger facilities tkraft pulp production

- Pre-extraction affects

dissolving pulp and polymxylan yield

- Requires lots of optimiz


9/13

Figure 2. Graph showcasing the combined production.

Birch Wood

Pre-Extraction,

Cooking andPulping

New Products

and

Applications

Dissolving

PulpPolymeric

XylanLignin

3. CONCLUSION Alkaline production

methods have pote

Production of new pconsidered economfeasible


10/13

Figure 2. Graph showcasing the combined production.

Birch Wood

Pre-Extraction,

Cooking andPulping

New Products

and

Applications

Dissolving

PulpPolymeric

XylanLignin

3. CONCLUSION Alkaline production

methods have pote

Production of new pconsidered economfeasible

Market succe More efficien

processes

FUTURE OUTLOO


11/13

Picture 2. nekoski Bioproduct mill


12/13

QUESTIONS?


13/13

References

Testova, L., Roselli, A., Costabel, L., Kovasin, K., Tenkanen, M., Sixta, H., Combined Production of Polymeric Birch Xylan and Paper Pulp by Alkaline Pre-eFollowed by Alkaline Cooking, ACS Publications 2014

Sixta, H., Handbook of Pulp, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 2006

Kamm, B., Gruber, P., Kamm, M., Biorefineries

Industrial Processes and Products. Status Quo and Future Directions. Vol. 1, WILEY-VCH Verlag GmbH &Weinheim 2006

Shi, H., Fatehi, P., Xiao, H., Ni, Y.,A process for isolating lignin of pre-hydrolysis liquor of kraft pulping process based on surfactant and calcium oxide trBiochemical Engineering Journal 68 (2012) 19-24

presentation on bioproducts

Documents