Influence of black liquor variability, combustion, and gasification process variables and inaccuracies in thermochemical data on equilibrium modeling resultsShow others and affiliations
2006 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 20, no 1, p. 359-363Article in journal (Refereed) Published
Resource type
Text
Abstract [en]
The present work is a systematic sensitivity study of how inaccuracies in thermochemical data influence important parameters resulting from chemical equilibrium modeling of black liquor combustion and gasification processes. These effects have also been compared with those originating from normal variations in process variables and black liquor composition. Determination of the effects was achieved by performing a large number of equilibrium calculations structured according to statistical designs. Evaluation of the chemical equilibrium model calculations was facilitated by regression analysis. From the results, it can be concluded that uncertainties in thermochemical data of several key components have significant effects on important chemical and physical modeling responses in black liquor combustion and gasification. These effects are in many cases comparable to, or larger than, the effects from variation in fuel and process variables. Experimental redetermination of thermochemical data for Na2S, K2S, and gaseous NaOH is suggested.
Place, publisher, year, edition, pages
Washington: American Chemical Society (ACS), 2006. Vol. 20, no 1, p. 359-363
Keywords [en]
thermodynamic models, recovery boiler, uncertainties, chlorides, design, sulfur, errors
National Category
Chemical Engineering Bioenergy
Identifiers
URN: urn:nbn:se:umu:diva-119418DOI: 10.1021/ef050181wISI: 000234818200053Scopus ID: 2-s2.0-33644537942OAI: oai:DiVA.org:umu-119418DiVA, id: diva2:926716
2016-05-092016-04-182023-03-23Bibliographically approved