New high-pressure gasification rate data for fast pyrolysis of black liquor char

Kari Saviharju, Antero Moilanen, Adriaan van Heiningen

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Abstract

It has been customary, when measuring the gasification rate of black liquor char, to add CO during the preceding temperature equilibration period in order to suppress the loss of sodium by the char before gasification is started.
The present study shows that this hot treatment before gasification leads to a reduction in the pressurized CO 2 gasification rate data. It is proposed that a thin layer of soot, deposited during the hot pretreatment, reduces the catalytic activity of sodium sites for carbon gasification by CO 2a. Surprisingly, the pressurized hot treatment has no effect on the pressurized H 2O gasification rate.
Atmospheric hot treatment has also no effect on the gasification rate. New high-pressure CO 2 gasification rate data are presented for fast pyrolysis black liquor char which has not been subjected to the hot treatment.
Original languageEnglish
Pages (from-to)231-236
JournalJournal of Pulp and Paper Science
Volume24
Issue number7
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

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Keywords

  • gasification

Cite this

Saviharju, K., Moilanen, A., & van Heiningen, A. (1998). New high-pressure gasification rate data for fast pyrolysis of black liquor char. Journal of Pulp and Paper Science, 24(7), 231-236.