Thermochemical conversion of black liquor organics into an oil product: II. Low-molecular-weight compounds in the aqueous-phase

Raimo Alen

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

This study concerned the conversion of black liquor organic components during heat treatment in the liquid phase. The liquor was treated for 45 minutes at 350-degrees-C after a sodium hydroxide charge of 15-45% of the mass of black liquor dry solids. A hydrophobic, lignin-derived oil product (about 40% of initial organics) was formed, in addition to volatile products (about 35% of initial organics) and fragments remaining in the aqueous phase. Detailed GLC analysis of the low-molecular-weight aqueous phase components indicated the presence of various aliphatic carboxylic acids (5-20% of initial organics). These acids were primarily degradation products of the original acid fraction of the feed black liquor. The influence of conversion conditions on the composition of the acid fraction is discussed.
Original languageEnglish
Pages (from-to)127 - 130
Number of pages4
JournalHolzforschung
Volume45
Issue number2
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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Oils
Molecular weight
Acids
Sodium Hydroxide
Lignin
Carboxylic Acids
Carboxylic acids
Heat treatment
Sodium
Degradation
Liquids
Chemical analysis

Cite this

@article{88ff00d25c064035b069954d2d70600a,
title = "Thermochemical conversion of black liquor organics into an oil product: II. Low-molecular-weight compounds in the aqueous-phase",
abstract = "This study concerned the conversion of black liquor organic components during heat treatment in the liquid phase. The liquor was treated for 45 minutes at 350-degrees-C after a sodium hydroxide charge of 15-45{\%} of the mass of black liquor dry solids. A hydrophobic, lignin-derived oil product (about 40{\%} of initial organics) was formed, in addition to volatile products (about 35{\%} of initial organics) and fragments remaining in the aqueous phase. Detailed GLC analysis of the low-molecular-weight aqueous phase components indicated the presence of various aliphatic carboxylic acids (5-20{\%} of initial organics). These acids were primarily degradation products of the original acid fraction of the feed black liquor. The influence of conversion conditions on the composition of the acid fraction is discussed.",
author = "Raimo Alen",
note = "Project code: POV90041",
year = "1991",
doi = "10.1515/hfsg.1991.45.2.127",
language = "English",
volume = "45",
pages = "127 -- 130",
journal = "Holzforschung",
issn = "0018-3830",
publisher = "De Gruyter",
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}

Thermochemical conversion of black liquor organics into an oil product : II. Low-molecular-weight compounds in the aqueous-phase. / Alen, Raimo.

In: Holzforschung, Vol. 45, No. 2, 1991, p. 127 - 130.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Thermochemical conversion of black liquor organics into an oil product

T2 - II. Low-molecular-weight compounds in the aqueous-phase

AU - Alen, Raimo

N1 - Project code: POV90041

PY - 1991

Y1 - 1991

N2 - This study concerned the conversion of black liquor organic components during heat treatment in the liquid phase. The liquor was treated for 45 minutes at 350-degrees-C after a sodium hydroxide charge of 15-45% of the mass of black liquor dry solids. A hydrophobic, lignin-derived oil product (about 40% of initial organics) was formed, in addition to volatile products (about 35% of initial organics) and fragments remaining in the aqueous phase. Detailed GLC analysis of the low-molecular-weight aqueous phase components indicated the presence of various aliphatic carboxylic acids (5-20% of initial organics). These acids were primarily degradation products of the original acid fraction of the feed black liquor. The influence of conversion conditions on the composition of the acid fraction is discussed.

AB - This study concerned the conversion of black liquor organic components during heat treatment in the liquid phase. The liquor was treated for 45 minutes at 350-degrees-C after a sodium hydroxide charge of 15-45% of the mass of black liquor dry solids. A hydrophobic, lignin-derived oil product (about 40% of initial organics) was formed, in addition to volatile products (about 35% of initial organics) and fragments remaining in the aqueous phase. Detailed GLC analysis of the low-molecular-weight aqueous phase components indicated the presence of various aliphatic carboxylic acids (5-20% of initial organics). These acids were primarily degradation products of the original acid fraction of the feed black liquor. The influence of conversion conditions on the composition of the acid fraction is discussed.

U2 - 10.1515/hfsg.1991.45.2.127

DO - 10.1515/hfsg.1991.45.2.127

M3 - Article

VL - 45

SP - 127

EP - 130

JO - Holzforschung

JF - Holzforschung

SN - 0018-3830

IS - 2

ER -