Borate autocausticizing equilibria in recovery boiler smelt
2005 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 20, no 2, 232-236 p.Article in journal (Refereed) PublishedText
The effect of the potassium and boron concentration in an alkali carbonate/borate mixture and the effect of CO, concentration in the gas were studied with thermogravimetry and thermal analysis up to 900 degrees C. Results show that the auto-causticizing reaction is readily reversible with 1 % CO2 or higher in the gas if the mixtures contain only sodium compounds. Both a higher CO, concentration and a higher potassium concentration lead to lower autocausticizing. In systems that contain only potassium compounds, the autocausticizing is low and no recarbonation is observed. In potassium-rich systems, volatilization of alkali- and/or boron-components becomes more prominent than in sodium systems.
Place, publisher, year, edition, pages
Stockholm: AB Svensk papperstidning , 2005. Vol. 20, no 2, 232-236 p.
alkali berates, boron, chemical equilibria, chemical recovery, decarbonation, partial borate autocausticizing, recovery boiler, smelt
IdentifiersURN: urn:nbn:se:umu:diva-120455ISI: 000230271800016OAI: oai:DiVA.org:umu-120455DiVA: diva2:928981