THE SIGNIFICANCE OF SODIUM RELEASE DURING DEVOLATILIZATION ON FUME FORMATION IN KRAFT RECOVERY FURNACES

Authors
VERRILL CL GRACE TM NICHOLS KM
Citation
Cl. Verrill et al., THE SIGNIFICANCE OF SODIUM RELEASE DURING DEVOLATILIZATION ON FUME FORMATION IN KRAFT RECOVERY FURNACES, Journal of pulp and paper science, 20(12), 1994, pp. 100000354-100000360
Citations number
25
Categorie Soggetti
Materials Science, Paper & Wood
Journal title
Journal of pulp and paper science → ACNP
ISSN journal
08266220
Volume
20
Issue
12
Year of publication
1994
Pages
100000354 - 100000360
Database
ISI
SICI code
0826-6220(1994)20:12<100000354:TSOSRD>2.0.ZU;2-4
Abstract
Approximately 5-20% of the sodium in black liquor was released during drying and devolatilization of individual drops in reducing and oxidiz ing pyrolytic atmospheres. The extent of this loss increased with incr easing furnace temperature (600-900-degrees-C) and decreased with incr easing relative gas velocity (0.61-1.83 m/s). This sodium loss is not caused by simple vaporization, but may result from convection of mater ial by escaping gases. The contribution of this sodium loss to overall fume formation is unknown; however, collected aerosol samples suggest that it is not the most significant source of submicron-sized fume in the recovery furnace.