Direct separation of acetate and furfural from xylose by nanofiltration of birch pretreated liquor: Effect of process conditions and separation mechanism

Jakub Zdarta, Anders Thygesen, Martin S. Holm, Anne S. Meyer, Manuel Pinelo*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Lignocellulosic biomass from wood is a potentially rich source of glucose and xylose, which may be used either directly as monosaccharides or function as monomeric building blocks for a range of bioeconomy processes. In this paper we present a forthright separation of monosaccharides from other compounds present in the liquor after thermal biomass pretreatment. The main focus is on separation of xylose from acetate, formate and furans (hydroxymethyl furfural and furfural) by direct nanofiltration of sulphuric acid-hydrothermally pretreated birch liquor (a process optimized for xylose liberation from the biomass). In the study, the performance of eight commercially available flat-sheet membranes with different molecular weight cut-off was compared at 20 and 40 bars of pressure for efficient separation, focusing mainly on xylose retention. The nanofiltration membranes type TS40 (polypiperazine amide) and NF90 (polyamide) with cut-off of around 200 Da were found to be the most suitable for such direct detoxification of the liquor providing xylose retention over 98% and less than 20% retention of the accompanying thermal carbohydrate degradation compounds. The fouling mechanism during separation of the pretreated birch liquor appeared to be mainly cake-layer fouling on the surface of the membrane. Employment of diananofiltration resulted in particularly high purity (over 90%) and recovery (over 99%) of xylose after three diafiltration rounds. Moreover, the selected membranes exhibited great reusability, as the retention of monosaccharides was almost unaltered after five repeated nanofiltration cycles. The data provide new insight into the factors and mechanisms affecting membrane-separation of complex biomass liquors and are of significance for refining of lignocellulosic biomass.
Original languageEnglish
Article number116546
JournalSeparation and Purification Technology
Volume239
Number of pages11
ISSN1383-5866
DOIs
Publication statusPublished - 2020

Keywords

  • Nanofiltration
  • Birch pretreated liquor
  • Inhibitors
  • Detoxification
  • Mechanism of fouling

Cite this

@article{b8bcc96894e044eda55a4d993c58a263,
title = "Direct separation of acetate and furfural from xylose by nanofiltration of birch pretreated liquor: Effect of process conditions and separation mechanism",
abstract = "Lignocellulosic biomass from wood is a potentially rich source of glucose and xylose, which may be used either directly as monosaccharides or function as monomeric building blocks for a range of bioeconomy processes. In this paper we present a forthright separation of monosaccharides from other compounds present in the liquor after thermal biomass pretreatment. The main focus is on separation of xylose from acetate, formate and furans (hydroxymethyl furfural and furfural) by direct nanofiltration of sulphuric acid-hydrothermally pretreated birch liquor (a process optimized for xylose liberation from the biomass). In the study, the performance of eight commercially available flat-sheet membranes with different molecular weight cut-off was compared at 20 and 40 bars of pressure for efficient separation, focusing mainly on xylose retention. The nanofiltration membranes type TS40 (polypiperazine amide) and NF90 (polyamide) with cut-off of around 200 Da were found to be the most suitable for such direct detoxification of the liquor providing xylose retention over 98{\%} and less than 20{\%} retention of the accompanying thermal carbohydrate degradation compounds. The fouling mechanism during separation of the pretreated birch liquor appeared to be mainly cake-layer fouling on the surface of the membrane. Employment of diananofiltration resulted in particularly high purity (over 90{\%}) and recovery (over 99{\%}) of xylose after three diafiltration rounds. Moreover, the selected membranes exhibited great reusability, as the retention of monosaccharides was almost unaltered after five repeated nanofiltration cycles. The data provide new insight into the factors and mechanisms affecting membrane-separation of complex biomass liquors and are of significance for refining of lignocellulosic biomass.",
keywords = "Nanofiltration, Birch pretreated liquor, Inhibitors, Detoxification, Mechanism of fouling",
author = "Jakub Zdarta and Anders Thygesen and Holm, {Martin S.} and Meyer, {Anne S.} and Manuel Pinelo",
year = "2020",
doi = "10.1016/j.seppur.2020.116546",
language = "English",
volume = "239",
journal = "Separation and Purification Technology",
issn = "1383-5866",
publisher = "Pergamon Press",

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TY - JOUR

T1 - Direct separation of acetate and furfural from xylose by nanofiltration of birch pretreated liquor: Effect of process conditions and separation mechanism

AU - Zdarta, Jakub

AU - Thygesen, Anders

AU - Holm, Martin S.

AU - Meyer, Anne S.

AU - Pinelo, Manuel

PY - 2020

Y1 - 2020

N2 - Lignocellulosic biomass from wood is a potentially rich source of glucose and xylose, which may be used either directly as monosaccharides or function as monomeric building blocks for a range of bioeconomy processes. In this paper we present a forthright separation of monosaccharides from other compounds present in the liquor after thermal biomass pretreatment. The main focus is on separation of xylose from acetate, formate and furans (hydroxymethyl furfural and furfural) by direct nanofiltration of sulphuric acid-hydrothermally pretreated birch liquor (a process optimized for xylose liberation from the biomass). In the study, the performance of eight commercially available flat-sheet membranes with different molecular weight cut-off was compared at 20 and 40 bars of pressure for efficient separation, focusing mainly on xylose retention. The nanofiltration membranes type TS40 (polypiperazine amide) and NF90 (polyamide) with cut-off of around 200 Da were found to be the most suitable for such direct detoxification of the liquor providing xylose retention over 98% and less than 20% retention of the accompanying thermal carbohydrate degradation compounds. The fouling mechanism during separation of the pretreated birch liquor appeared to be mainly cake-layer fouling on the surface of the membrane. Employment of diananofiltration resulted in particularly high purity (over 90%) and recovery (over 99%) of xylose after three diafiltration rounds. Moreover, the selected membranes exhibited great reusability, as the retention of monosaccharides was almost unaltered after five repeated nanofiltration cycles. The data provide new insight into the factors and mechanisms affecting membrane-separation of complex biomass liquors and are of significance for refining of lignocellulosic biomass.

AB - Lignocellulosic biomass from wood is a potentially rich source of glucose and xylose, which may be used either directly as monosaccharides or function as monomeric building blocks for a range of bioeconomy processes. In this paper we present a forthright separation of monosaccharides from other compounds present in the liquor after thermal biomass pretreatment. The main focus is on separation of xylose from acetate, formate and furans (hydroxymethyl furfural and furfural) by direct nanofiltration of sulphuric acid-hydrothermally pretreated birch liquor (a process optimized for xylose liberation from the biomass). In the study, the performance of eight commercially available flat-sheet membranes with different molecular weight cut-off was compared at 20 and 40 bars of pressure for efficient separation, focusing mainly on xylose retention. The nanofiltration membranes type TS40 (polypiperazine amide) and NF90 (polyamide) with cut-off of around 200 Da were found to be the most suitable for such direct detoxification of the liquor providing xylose retention over 98% and less than 20% retention of the accompanying thermal carbohydrate degradation compounds. The fouling mechanism during separation of the pretreated birch liquor appeared to be mainly cake-layer fouling on the surface of the membrane. Employment of diananofiltration resulted in particularly high purity (over 90%) and recovery (over 99%) of xylose after three diafiltration rounds. Moreover, the selected membranes exhibited great reusability, as the retention of monosaccharides was almost unaltered after five repeated nanofiltration cycles. The data provide new insight into the factors and mechanisms affecting membrane-separation of complex biomass liquors and are of significance for refining of lignocellulosic biomass.

KW - Nanofiltration

KW - Birch pretreated liquor

KW - Inhibitors

KW - Detoxification

KW - Mechanism of fouling

U2 - 10.1016/j.seppur.2020.116546

DO - 10.1016/j.seppur.2020.116546

M3 - Journal article

VL - 239

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

M1 - 116546

ER -