Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/130969
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Viscosity variation of model compounds during hydrothermal liquefaction under subcritical conditions of water |
Author: | Edifor, S.Y. Nguyen, Q.D. van Eyk, P. Biller, P. Hall, T. Lewis, D.M. |
Citation: | Industrial and Engineering Chemistry Research, 2021; 60(2):980-989 |
Publisher: | American Chemical Society |
Issue Date: | 2021 |
ISSN: | 0888-5885 1520-5045 |
Statement of Responsibility: | Sylvia Y. Edifor, Quoc D. Nguyen, Philip van Eyk, Patrick Biller, Tony Hall and David M. Lewis |
Abstract: | Recent assessments in waste-to-energy technologies highlight hydrothermal liquefaction (HTL) as a suitable process for converting organic-rich waste with high moisture content into a useful resource. Organic waste materials, including sewage sludge, food, and agricultural waste residues, typically contain lipids, carbohydrates, proteins, and lignin with varying compositions depending on their origin. Fluid properties of reacting HTL slurries under subcritical water conditions, particularly viscosity and density, affect material flow and heat transfer in both batch and continuous HTL process systems. Real-time viscosity variations of 20 wt % water slurries of model compounds, sunflower oil, sucrose, and soy protein were determined in a stirred tank batch reactor using the Metzner–Otto method. Measured torque on the impeller shaft at a fixed impeller speed was used to determine the changes in the viscosity of the reacting slurry at different reaction temperatures. Changes in the viscosity of the sunflower oil mixture were insignificant as compared to viscosity variations with sugar- and soy protein-derived feedstock. The viscosity of the soy protein solution decreased rapidly with the temperature during hydrolysis of polypeptides into amino acids between 25 and 100 °C. Further increase in the temperature led to minimal changes in viscosity as more soluble compounds were produced above 100 °C. The viscosity of the sucrose solution changed significantly above 250 °C when carbon compounds precipitated from the solution. Viscosity variations of mixtures of model compounds were determined to predict viscosity changes in biomass. |
Keywords: | Lipids; carbohydrates; mixtures; fluids; viscosity |
Rights: | © 2021 American Chemical Society |
DOI: | 10.1021/acs.iecr.0c04845 |
Grant ID: | http://purl.org/au-research/grants/arc/LP150101241 |
Published version: | http://dx.doi.org/10.1021/acs.iecr.0c04845 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.