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Influence of pressure on pyrolysis of black liquor: 2. Char yields and component release
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics, Energy Technology and Thermal Process Chemistry.
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2008 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 99, no 3, 671-679 p.Article in journal (Refereed) PublishedText
Abstract [en]

This is the second in a series of papers concerning the behavior of black liquor during pyrolysis at elevated pressures. Two industrial black liquors were pyrolyzed under pressurized conditions in two laboratory-scale devices, a pressurized single-particle reactor and a pressurized grid heater. Temperatures ranging between 650 and 1100 degrees C and pressures in the range 1-20 bar were studied. Char yields were calculated and based on analysis of some of the chars the fate of carbon, sodium, potassium and sulfur was determined as a function of pyrolysis pressure. At temperatures below 800 degrees C little variation in char yield was observed at different pressures. At higher temperatures char yield increased with pressure due to slower decomposition of sodium carbonate. For the same reason, sodium release decreased with pressure. Sulfur release, however, increased with pressure primarily because there was less opportunity for its capture in the less-swollen chars.

Place, publisher, year, edition, pages
Oxford: Elsevier, 2008. Vol. 99, no 3, 671-679 p.
Keyword [en]
black liquor, char, pressure, pyrolysis, volatiles
National Category
Bioenergy Environmental Sciences related to Agriculture and Land-use Industrial Biotechnology
URN: urn:nbn:se:umu:diva-117510DOI: 10.1016/j.biortech.2006.11.064ISI: 000251491200030PubMedID: 17349787OAI: diva2:908387
Available from: 2016-03-02 Created: 2016-03-01 Last updated: 2016-03-02Bibliographically approved

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