Removal of wood extractives as pulp (pre-)treatment: a technological review

Abstract Wood extractives usually do not exceed five percent of dry wood mass but can be a serious issue for pulping as well as for the pulp itself. They cause contamination and damages to process equipment and negatively influence pulp quality. This paper addresses not only the extractives-related...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Maximilian Lehr, Martin Miltner, Anton Friedl
Formato:	article
Lenguaje:	EN
Publicado:	Springer 2021
Materias:	Extractives Pulp Removal Treatment Wood Science Q Technology T
Acceso en línea:	https://doaj.org/article/a7ef7e24c08d4338885ac16141b8d4f3
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a7ef7e24c08d4338885ac16141b8d4f3
record_format	dspace
spelling	oai:doaj.org-article:a7ef7e24c08d4338885ac16141b8d4f32021-11-28T12:13:28ZRemoval of wood extractives as pulp (pre-)treatment: a technological review10.1007/s42452-021-04873-12523-39632523-3971https://doaj.org/article/a7ef7e24c08d4338885ac16141b8d4f32021-11-01T00:00:00Zhttps://doi.org/10.1007/s42452-021-04873-1https://doaj.org/toc/2523-3963https://doaj.org/toc/2523-3971Abstract Wood extractives usually do not exceed five percent of dry wood mass but can be a serious issue for pulping as well as for the pulp itself. They cause contamination and damages to process equipment and negatively influence pulp quality. This paper addresses not only the extractives-related problems but also different solutions for these issues. It is an extensive review of different technologies for removing wood extractives, starting with methods prior to pulping. Several wood yard operations like debarking, knot separation, and wood seasoning are known to significantly decreasing the amount of wood extractives. Biological treatment has also been proven as a feasible method for reducing the extractives content before pulping, but quite hard to handle. During pulping, the extractives reduction efficiency depends on the pulping method. Mechanical pulping removes the accessory compounds of wood just slightly, but chemical pulping, on the other hand, removes them to a large extent. Organosolv pulping even allows almost complete removal of wood extractives. The residual extractives content can be significantly reduced by pulp bleaching. Nevertheless, different extraction-based methods have been developed for removing wood extractives before pulping or bleaching. They range from organic-solvent-based extractions to novel processes like supercritical fluid extractions, ionic liquids extractions, microwave technology, and ultrasonic-assisted extraction. Although these methods deliver promising results and allow utilization of wood extractives in most cases, they suffer from many drawbacks towards an economically viable industrial-scale design, concluding that further research has to be done on these topics. Graphical abstractMaximilian LehrMartin MiltnerAnton FriedlSpringerarticleExtractivesPulpRemovalTreatmentWoodScienceQTechnologyTENSN Applied Sciences, Vol 3, Iss 12, Pp 1-22 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Extractives Pulp Removal Treatment Wood Science Q Technology T
spellingShingle	Extractives Pulp Removal Treatment Wood Science Q Technology T Maximilian Lehr Martin Miltner Anton Friedl Removal of wood extractives as pulp (pre-)treatment: a technological review
description	Abstract Wood extractives usually do not exceed five percent of dry wood mass but can be a serious issue for pulping as well as for the pulp itself. They cause contamination and damages to process equipment and negatively influence pulp quality. This paper addresses not only the extractives-related problems but also different solutions for these issues. It is an extensive review of different technologies for removing wood extractives, starting with methods prior to pulping. Several wood yard operations like debarking, knot separation, and wood seasoning are known to significantly decreasing the amount of wood extractives. Biological treatment has also been proven as a feasible method for reducing the extractives content before pulping, but quite hard to handle. During pulping, the extractives reduction efficiency depends on the pulping method. Mechanical pulping removes the accessory compounds of wood just slightly, but chemical pulping, on the other hand, removes them to a large extent. Organosolv pulping even allows almost complete removal of wood extractives. The residual extractives content can be significantly reduced by pulp bleaching. Nevertheless, different extraction-based methods have been developed for removing wood extractives before pulping or bleaching. They range from organic-solvent-based extractions to novel processes like supercritical fluid extractions, ionic liquids extractions, microwave technology, and ultrasonic-assisted extraction. Although these methods deliver promising results and allow utilization of wood extractives in most cases, they suffer from many drawbacks towards an economically viable industrial-scale design, concluding that further research has to be done on these topics. Graphical abstract
format	article
author	Maximilian Lehr Martin Miltner Anton Friedl
author_facet	Maximilian Lehr Martin Miltner Anton Friedl
author_sort	Maximilian Lehr
title	Removal of wood extractives as pulp (pre-)treatment: a technological review
title_short	Removal of wood extractives as pulp (pre-)treatment: a technological review
title_full	Removal of wood extractives as pulp (pre-)treatment: a technological review
title_fullStr	Removal of wood extractives as pulp (pre-)treatment: a technological review
title_full_unstemmed	Removal of wood extractives as pulp (pre-)treatment: a technological review
title_sort	removal of wood extractives as pulp (pre-)treatment: a technological review
publisher	Springer
publishDate	2021
url	https://doaj.org/article/a7ef7e24c08d4338885ac16141b8d4f3
work_keys_str_mv	AT maximilianlehr removalofwoodextractivesaspulppretreatmentatechnologicalreview AT martinmiltner removalofwoodextractivesaspulppretreatmentatechnologicalreview AT antonfriedl removalofwoodextractivesaspulppretreatmentatechnologicalreview
_version_	1718408159721160704

Removal of wood extractives as pulp (pre-)treatment: a technological review

Ejemplares similares