Matches in SemOpenAlex for { <https://semopenalex.org/work/W276823763> ?p ?o ?g. }
Showing items 1 to 63 of
63
with 100 items per page.
- W276823763 abstract "Black liquor is considered as being one of the most important process streams as far as the design and optimization of kraft pulp mills are concerned. Many methods have been developed in order to describe and, possibly, predict its physico-chemical properties. Most of them are, however, empirical methods that are difficult to generalize. Attempts to model the properties of black liquor based on rigorous solution thermodynamics are rare.This work uses Pitzer’s semi-empirical model to calculate the activity coefficients and osmotic coefficient in aqueous electrolyte solutions in order to estimate the solubilities of salts and the boiling point elevation in black liquor and related systems. The salts investigated included burkeite and (sodium sulphate) dicarbonate, both double salts of Na2CO3 and Na2SO4. Besides activity coefficients, a thermodynamic definition of the solubility constant was applied to the modelling of the solubilities of these salts. A solubility model for burkeite was consequently developed, based on literature data. The model predicts the solubility and the composition of the solid phase in solid solutions of burkeite and sodium carbonate. Furthermore, the average solubility constant values for dicabonate were calculated for three temperature levels using the experimental values of the solubility obtained in this work.The boiling point elevation for salt solutions was calculated using the Pitzer method for estimating the osmotic coefficient and compared with the literature data. The predictions were excellent in salt solutions at low-to-moderate concentration levels. It was found that neglecting the higher-order interaction coefficients did not affect the predictions at these concentrations significantly. The Pitzer method was also used to estimate the boiling point elevation in black liquor solutions; the results were compared to the experimental values obtained in an earlier project. The solubility models developed earlier were used to account for the precipitation of salt. It was found that the model predicted the boiling point rise reasonably well at low concentration levels; at concentrations above those recommended by Pitzer, the predictions were somewhat poorer. It was also found that a proper description of the organic compounds found in black liquor is important for the accurate estimation of its boiling point." @default.
- W276823763 created "2016-06-24" @default.
- W276823763 creator A5020810251 @default.
- W276823763 date "2008-01-01" @default.
- W276823763 modified "2023-09-26" @default.
- W276823763 title "Thermodynamic modelling of black liquor-related solutions. Pitzer method for estimating activities, solubilities and boiling point rise" @default.
- W276823763 hasPublicationYear "2008" @default.
- W276823763 type Work @default.
- W276823763 sameAs 276823763 @default.
- W276823763 citedByCount "0" @default.
- W276823763 crossrefType "dissertation" @default.
- W276823763 hasAuthorship W276823763A5020810251 @default.
- W276823763 hasConcept C121332964 @default.
- W276823763 hasConcept C129396204 @default.
- W276823763 hasConcept C132871171 @default.
- W276823763 hasConcept C155574463 @default.
- W276823763 hasConcept C170961132 @default.
- W276823763 hasConcept C178790620 @default.
- W276823763 hasConcept C184651966 @default.
- W276823763 hasConcept C185592680 @default.
- W276823763 hasConcept C188596812 @default.
- W276823763 hasConcept C2781052789 @default.
- W276823763 hasConcept C2781110116 @default.
- W276823763 hasConcept C97355855 @default.
- W276823763 hasConceptScore W276823763C121332964 @default.
- W276823763 hasConceptScore W276823763C129396204 @default.
- W276823763 hasConceptScore W276823763C132871171 @default.
- W276823763 hasConceptScore W276823763C155574463 @default.
- W276823763 hasConceptScore W276823763C170961132 @default.
- W276823763 hasConceptScore W276823763C178790620 @default.
- W276823763 hasConceptScore W276823763C184651966 @default.
- W276823763 hasConceptScore W276823763C185592680 @default.
- W276823763 hasConceptScore W276823763C188596812 @default.
- W276823763 hasConceptScore W276823763C2781052789 @default.
- W276823763 hasConceptScore W276823763C2781110116 @default.
- W276823763 hasConceptScore W276823763C97355855 @default.
- W276823763 hasLocation W2768237631 @default.
- W276823763 hasOpenAccess W276823763 @default.
- W276823763 hasPrimaryLocation W2768237631 @default.
- W276823763 hasRelatedWork W1519457121 @default.
- W276823763 hasRelatedWork W1969802740 @default.
- W276823763 hasRelatedWork W1979520299 @default.
- W276823763 hasRelatedWork W2001347805 @default.
- W276823763 hasRelatedWork W2021977823 @default.
- W276823763 hasRelatedWork W2065104681 @default.
- W276823763 hasRelatedWork W2069048024 @default.
- W276823763 hasRelatedWork W2122872973 @default.
- W276823763 hasRelatedWork W2125270145 @default.
- W276823763 hasRelatedWork W2173006898 @default.
- W276823763 hasRelatedWork W2318735327 @default.
- W276823763 hasRelatedWork W2327602110 @default.
- W276823763 hasRelatedWork W2360731960 @default.
- W276823763 hasRelatedWork W2362765416 @default.
- W276823763 hasRelatedWork W2364439557 @default.
- W276823763 hasRelatedWork W2367993656 @default.
- W276823763 hasRelatedWork W2382260319 @default.
- W276823763 hasRelatedWork W2387507121 @default.
- W276823763 hasRelatedWork W2610876853 @default.
- W276823763 hasRelatedWork W3185991540 @default.
- W276823763 isParatext "false" @default.
- W276823763 isRetracted "false" @default.
- W276823763 magId "276823763" @default.
- W276823763 workType "dissertation" @default.