Gasification of sulphate soap for the lime kiln

Kari Saviharju, Tuomas Timonen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Sulphate soap is a by-product of pulp mills utilized as a raw material for the chemical industry. However, this results in an increase in sulphur input of several kilograms SO2 per ADt pulp into the mill. Another increasingly interesting alternative is to utilize soap in the lime kiln of the mill. This has a positive effect, in addition to sulphur problems, on the energy balance of the mill. The crucial problem is the high Na + K content of the soap, from 4 to 8%, which can result in plugging of the lime kiln. The operational problems can be avoided by gasifying the soap and by separating the inorganic materials from the product gas before the kiln. This paper describes research work on the gasification of crude sulphate soap carried out at VTT over the years 1991 and 1992. This work will be continued in 1993 by focusing on specified problems, after which commercial applications should be available. A detailed research report will be published after this second stage of research has been completed.

Original languageEnglish
Pages (from-to)159 - 166
Number of pages8
JournalBioresource Technology
Volume46
Issue number1 - 2
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

Fingerprint

Soaps (detergents)
Kilns
Gasification
Lime
Sulfates
lime
sulfate
mill
Sulfur
sulfur
Paper and pulp mills
chemical industry
research work
Chemical industry
Energy balance
energy balance
Pulp
Byproducts
Raw materials
Gases

Keywords

  • gasification

Cite this

Saviharju, Kari ; Timonen, Tuomas. / Gasification of sulphate soap for the lime kiln. In: Bioresource Technology. 1993 ; Vol. 46, No. 1 - 2. pp. 159 - 166.
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Gasification of sulphate soap for the lime kiln. / Saviharju, Kari; Timonen, Tuomas.

In: Bioresource Technology, Vol. 46, No. 1 - 2, 1993, p. 159 - 166.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Gasification of sulphate soap for the lime kiln

AU - Saviharju, Kari

AU - Timonen, Tuomas

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AB - Sulphate soap is a by-product of pulp mills utilized as a raw material for the chemical industry. However, this results in an increase in sulphur input of several kilograms SO2 per ADt pulp into the mill. Another increasingly interesting alternative is to utilize soap in the lime kiln of the mill. This has a positive effect, in addition to sulphur problems, on the energy balance of the mill. The crucial problem is the high Na + K content of the soap, from 4 to 8%, which can result in plugging of the lime kiln. The operational problems can be avoided by gasifying the soap and by separating the inorganic materials from the product gas before the kiln. This paper describes research work on the gasification of crude sulphate soap carried out at VTT over the years 1991 and 1992. This work will be continued in 1993 by focusing on specified problems, after which commercial applications should be available. A detailed research report will be published after this second stage of research has been completed.

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