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The study of dissolution kinetics of K2SO4 crystal in aqueous ethanol solutions with a statistical rate theory
Nanjing University of Technology.
Nanjing University of Technology.
Nanjing University of Technology.
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2004 (English)In: Chinese Journal of Chemical Engineering, ISSN 1004-9541, E-ISSN 2210-321X, Vol. 12, p. 128-130Article in journal (Refereed) Published
Abstract [en]

Dissolution kinetics of K2SO4 crystal in aqueous ethanol solutions was studied on-line with ion selective electrode. The concentration of K2SO4 was calculated from the determined electromotive force in which the activity coefficient of components in the liquid phase was calculated with the Pitzer equation. Dissolution kinetic parameters in the modified statistical rate theory were regressed. The correlation results show that dissolution rate of K2SO4 is slower in aqueous ethanol solutions than that in aqueous solutions. The two most important reasons are as follows: (1) The solubility Of K2SO4 in aqueous ethanol solutions is lower than that in aqueous solutions, which causes a decrease of the driving force of mass transfer. (2) The process of surface reaction Of K2SO4 became slower due to the addition of ethanol, so that the whole process is mainly dominated by the surface reaction instead of mass transfer.

Place, publisher, year, edition, pages
2004. Vol. 12, p. 128-130
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-3384Local ID: 1351b040-0d7c-11de-9d3e-000ea68e967bOAI: oai:DiVA.org:ltu-3384DiVA, id: diva2:976242
Note
Upprättat; 2004; 20090310 (xiajix)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Ji, Xiaoyan

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