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Phase-behavior of alkyl ketene dimmer (AKD) in supercritical carbon dioxide. The implications of using different solubility measurement methods

In English

Författare

Summary, in English

In this work, three different methods were used to determine the phase behavior of alkyl ketene dimer (AKD) in supercritical carbon dioxide (SC-CO2). Rough values for the total solubility of AKD in SC-CO2 were obtained. The solubility ranges from 1 to 14 mg AKD/g CO2 at temperatures from 40 to 80 degrees C and pressures from 10 to 30 MPa. A significant increase in solubility was observed in the region above 50 degrees C and 20 MPa. A region of improved solubility was found, without the presence of a cross-over pressure point. The fact that different solubility methods gave different results was discussed and the importance of data interpretation was highlighted. H-1 NMR and MALDI-TOF MS analyses were utilized to chemically characterize the AKD wax. Its special behavior and the influence of data interpretation on the design of a RESS process were discussed. (C) 2011 Elsevier B.V. All rights reserved.

Publiceringsår

2012

Språk

Engelska

Sidor

25-33

Publikation/Tidskrift/Serie

Journal of Supercritical Fluids

Volym

61

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Organic Chemistry

Nyckelord

  • Alkyl ketene dimer
  • Wax
  • Supercritical carbon dioxide
  • Solubility

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0896-8446