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Conclusions

  • Aminul Islam
  • Pogaku Ravindra
Chapter

Abstract

In conclusion, from the rheological study, boehmite suspensions under controlled pH conditions show a non-Newtonian behavior that could result from particle–particle aggregation due to weak attractive forces. The correlations found were that the consistency index (k) increased with decreasing suspension pH and in turn increased suspension viscosity. The flow behavior index (n) increases with increasing pH, reaching a maximum value at pH 7.6. The results show that the flow activation energy (∆E) response of boehmite suspensions is sensitive to a change in pH. Similar to the flow behavior index, decreasing the pH to 1 resulted in an increase in the ∆E value, suggesting the rigidity of the gel network. Based on the results, the suspensions with the high pH showed high sensitivity to temperature with low activation energy. The correlation between the rheology of the suspension and the density of the boehmite sol suggests that increased interparticle interactions at low pH may be the cause of the higher density.

Keywords

Transesterification Reaction Flow Behavior Index Spherical Bead Flow Activation Energy Mesoporous Characteristic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer International Publishing Switzerland 2017

Authors and Affiliations

  • Aminul Islam
    • 1
    • 2
  • Pogaku Ravindra
    • 1
    • 2
  1. 1.Faculty of EngineeringUniversiti Malaysia SabahKotakinabaluMalaysia
  2. 2.Energy Research UnitUniversity Malaysia SabahKotakinabaluMalaysia

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